Geochemical major-oxide, minor-oxide, trace-element, and rare-earth-element data from rocks and streams sediments collected in 2012 in the Ray Mountains area, Beaver, Bettles, Livengood, and Tanana quadrangles, Alaska

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What does this data set describe?

Title:: Geochemical major-oxide, minor-oxide, trace-element, and rare-earth-element data from rocks and streams sediments collected in 2012 in the Ray Mountains area, Beaver, Bettles, Livengood, and Tanana quadrangles, Alaska
Abstract:: Mineral-resources personnel from the Alaska Division of Geological & Geophysical Surveys (DGGS) carried out a helicopter-supported geological and geochemical resource assessment project in the Beaver, Bettles, Livengood, and Tanana quadrangles from June 23 through August 5, 2012. The objectives of DGGS's resource assessment are to improve the trace-element geochemical coverage of selected watersheds; to obtain modern, quantitative geochemical analyses; to understand the petrogenesis of the granites; and to better document established mineral occurrences. Stream-sediment, pan-concentrate, and rock sampling were conducted as part of the State's Rare Earth Elements and Strategic Minerals Assessment project, which is designed to evaluate Alaska's potential for these resources. Highlights of this sampling project include documenting patterns of variable REE enrichment in the granites, and identifying bedrock samples of greisen and oxidized breccias with enriched REE, and stream sediments with enriched REEs that have a pattern of variation that mimics that of the granites.
Supplemental_Information:: This data distribution package consists of multiple CSV files which provide sample locations and descriptions, geochemical data, analytical methods, and instrumentation detection limits for analysis of the samples collected for this project. For each analytical data type, a primary table presents the analytical results, sample locations, and other information about each sample. A secondary table provides detailed information about the methods and detection limits of the instrumentation used to analyze the data. The DGGS metadata standard extends the FGDC standard to include elements that are required to facilitate our internal data management. These elements, referred to as "layers," group and describe files that have intrinsic logical or topological relationships. Attribute information for each layer is included in this metadata file under the "Entity_and_Attribute_Information" section. The metadata layer provides the metadata, codesets, or other documentation files applicable to all layers. The data layer(s) are titled: >pan-con-trace-element-ree: trace-element and rare-earth-element analysis of pan-concentrate samples >rock-major-minor-oxide-trace-element-ree: major- and minor-oxide, trace-element, and rare-earth-element analysis of pulverized rock samples >rock-trace-element-ree: trace-element and rare-earth-element analysis of pulverized rock samples >slab-xrf-major-minor-oxide-trace-element: major- and minor-oxide and trace-element analysis of rock-slab samples >stream-sed-trace-element-ree: trace-element and rare-earth-element analysis of stream-sediment and soil samples >sample-location-details-no-suitable-media: list of visited locations in which samples were not collected for reasons noted

How should this data set be cited?
Bachmann, E.N., Blessington, M.J., Freeman, L.K., Newberry, R.J., Tuzzolino, A.L., Wright, T.C., and Wylie, William, 2013, Geochemical major-oxide, minor-oxide, trace-element, and rare-earth-element data from rocks and streams sediments collected in 2012 in the Ray Mountains area, Beaver, Bettles, Livengood, and Tanana quadrangles, Alaska: Raw Data File RDF 2013-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.
Online Links:
- <http://www.dggs.alaska.gov/pubs/id/25386>
Other_Citation_Details: 4 p.
What geographic area does the data set cover?

West_Bounding_Coordinate: -151.717019

East_Bounding_Coordinate: -149.756801

North_Bounding_Coordinate: 66.79450811

South_Bounding_Coordinate: 65.627367
What does it look like?
Does the data set describe conditions during a particular time period?

Calendar_Date: 2012
Currentness_Reference: ground condition
What is the general form of this data set?

Geospatial_Data_Presentation_Form: ASCII tabular files, report
How does the data set represent geographic features?
1. How are geographic features stored in the data set?
  This is a point data set.
2. What coordinate system is used to represent geographic features?
  The horizontal datum used is North American Datum of 1927.
  The ellipsoid used is North American Datum of 1927.
  The semi-major axis of the ellipsoid used is 6378206.4.
  The flattening of the ellipsoid used is 1/294.9786982.

How does the data set describe geographic features?

rdf2013-5-pan-con-trace-element-ree.csv, rdf2013-5-pan-con-trace-element-ree-limits.csv

Trace-element and rare-earth-element analysis of pan-concentrate samples. (Source: Alaska Division of Geological & Geophysical Surveys)

Station

Label assigned to identify the field location where a sample was collected. For this project a unique station value was created for all visited sites that yielded samples. However, the "Station" identifier does not uniquely identify each sample; in some cases, multiple samples were collected from the same site for different purposes. In other cases, a station number may be duplicated because the lab provided multiple analyses for a particular sample. (Source: Alaska Division of Geological & Geophysical Surveys)

Generic example of a station identifier: 20YYAAA9999X: YY=last two digits of year, AAA=geologist's initials (one to three characters), 9999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location or that multiple observations were recorded in the project database. The initials used by the geologists who collected samples for this project are: AT = Amy L. Tuzzolino; BW = William (aka Bill) Wylie; LF = Larry Freeman; RN = Rainer Newberry; MJB = Michael J. Blessington; MBW = Melanie B. Werdon; CW = T. Colby Wright; and EB = Erik N. Bachmann.

Latitude

Latitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

Range of values
Minimum:	65.63976624
Maximum:	66.79450811
Units:	decimal degrees

Longitude

Longitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

Range of values
Minimum:	-151.7149775
Maximum:	-149.9250977
Units:	decimal degrees

Weight_g

Sample weight in grams (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex)

Range of values
Minimum:	4
Maximum:	90
Units:	grams

Stream_W

The estimated average width of stream at the sample site. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Range of values
Minimum:	0.2
Maximum:	60
Units:	meters

Stream_D

The estimated depth of stream at the sample site. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Range of values
Minimum:	0.1
Maximum:	105
Units:	meters

Stream_Spd

Qualitative description of the stream flow rate and stream channel morphology at the field station where the sample was collected.. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.
stagnant	no apparent current, bed is composed of organics, silt or sand, and banks are composed of silt and organics, no gravel is present.
slow	slow current, few riffles, bed and banks are composed of gravel and sand, minor cobbles and silt, organics may be present.
swift	fast moving water, many riffles, bed and bank are composed of cobbles and gravel with minor sand.
tumbling	step-wise flows with plunges and pools, bed and banks are composed of boulders and cobbles with minor gravel and finer sediment.
slow-stagnant	very slow current with stagnant pools, bed is comprised of sand and banks are composed of silt; organics and a small amount of gravel may be present.
swift-slow	varied flow rate and channel morphology, bed and banks are composed of gravel and sand, banks are composed of sand, silt and minor gravel; cobbles and organics may be present.
tumbling-swift-slow	varied flow rate and channel morphology with intermittent step-wise plunges and pools, bed and banks are variable and may be composed of boulders, cobbles, gravel, sand, or silt organics may be present.
tumbling-slow	slow current with few riffles and intermittent step-wise plunges and pools, bed and banks are variable and may be composed of cobbles, gravel, sand, or silt, organics may be present.
tumbling-swift	fast moving water with many riffles and intermittent step-wise flows with plunges and pools, bed and banks are composed of boulders and cobbles with minor gravel and finer sediment.

Stream_Ord

Relative magnitude of the stream based on its position within the tributary hierarchy of the drainage basin.. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Formal codeset
Codeset Name:	Numeric values were assigned according to Strahler, A. N. (1957) classification system.
Codeset Source:	Strahler, A. N. (1957), Quantitative analysis of watershed geomorphology: Transactions of the American Geophysical Union Vol 38, p. 913-920.

Stream_Sit

The type of material that forms the bed and banks of the sampled stream channel.. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.
alluvium	Natural unconsolidated aggregate deposited by rivers, streams and creeks.
colluvium	Natural unconsolidated aggregate resulting from down slope movement of loose rocks and soil.
bedrock	Solid in situ rock and boulders that have not been transported.

Grain_Size

Estimated classification of the size of material that is the source of the sample. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Formal codeset
Codeset Name:	Unified Soil Classification System (USCS)
Codeset Source:	United States Army Engineer Waterways Experiment Station (1960), The Unified Soil Classification System: Technical Memorandum No. 3-357, U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS.

Source

Description of depositional environment of the specific sample site. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.
point-bar	Gravel or sand deposited at the downstream end of a gravel bar.
boulder/log-eddy	Gravel or sand deposited downstream of an obstruction such as a log or boulder.
gravel-armor	Sediment trapped below pebble or cobble pavement at the leading edge of a gravel bar.
moss-mat	Sand or gravel trapped in a moss mat in the main channel or bank of a creek.
plunge-pool	Sand or gravel deposited at the edge of a pool below a water fall.

Num_Sites

Number of sample sites at the station. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Range of values
Minimum:	1
Maximum:	6

Dist_Samp

The distance between the creek bed and the sample site. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Range of values
Minimum:	0.5
Maximum:	20
Units:	meters

Sed_Colors

Primary and, if applicable, secondary color of chemical or biogenic precipitate on the stream bed material qualitatively assigned by the sampler, no color palate or guide is used.. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

The color selection values used in this table are: "black"; "black, brown"; "black, orange"; "brown"; "brown, black"; "brown, orange"; "brown, white"; "orange"; "orange, brown"; "orange, red"; "white";

Intensity

Intensity of the chemical or biogenic precipitate on the stream bed material qualitatively assigned by the sampler. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.
weak	Precipitate binds otherwise unconsolidated deposits.
heavy	Obscures the texture and color of the stream bed materials.
moderate	Obscures the color of the stream bed materials.

Description

Description of the sample. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Characters 1 to 254 of a brief sample and/or station description.

Descrip_2

Extension of the sample and/or station description for descriptions which are greater than 254 characters in length. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Characters greater than 255 of the sample and/or station description.

Ba_ppm_1

Barium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	76.7
Maximum:	4930
Units:	parts per million

Ce_ppm_1

Cerium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-2	Above detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	24.8
Maximum:	8440
Units:	parts per million

Ce_ppm_2

Cerium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 3 ppm; Upper detection limit = 50000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	20800
Maximum:	20800
Units:	parts per million

Cr_ppm_1

Chromium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-2	Above detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	10
Maximum:	7400
Units:	parts per million

Cs_ppm

Cesium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.01 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.92
Maximum:	72.8
Units:	parts per million

Dy_ppm_1

Dysprosium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.05 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-2	Above detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1.84
Maximum:	417
Units:	parts per million

Dy_ppm_2

Dysprosium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.3 ppm; Upper detection limit = 5000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1150
Maximum:	1150
Units:	parts per million

Er_ppm_1

Erbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.03 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1.14
Maximum:	684
Units:	parts per million

Er_ppm_2

Erbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.2 ppm; Upper detection limit = 5000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	716
Maximum:	716
Units:	parts per million

Eu_ppm_1

Europium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.03 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.19
Maximum:	19.3
Units:	parts per million

Eu_ppm_2

Europium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.2 ppm; Upper detection limit = 5000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	10.7
Maximum:	10.7
Units:	parts per million

Ga_ppm_1

Gallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 1 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	4.8
Maximum:	87.8
Units:	parts per million

Gd_ppm_1

Gadolinium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.05 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1.83
Maximum:	932
Units:	parts per million

Gd_ppm_2

Gadolinium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.3 ppm; Upper detection limit = 5000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1080
Maximum:	1080
Units:	parts per million

Hf_ppm_1

Hafnium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	2.6
Maximum:	300
Units:	parts per million

Hf_ppm_2

Hafnium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 1 ppm; Upper detection limit = 50000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	843
Maximum:	843
Units:	parts per million

Ho_ppm_1

Holmium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.01 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.39
Maximum:	214
Units:	parts per million

Ho_ppm_2

Holmium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.05 ppm; Upper detection limit = 5000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	248
Maximum:	248
Units:	parts per million

La_ppm_1

Lanthanum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	14.6
Maximum:	9870
Units:	parts per million

La_ppm_2

Lanthanum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 3 ppm; Upper detection limit = 50000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	10050
Maximum:	10050
Units:	parts per million

Lu_ppm_1

Lutetium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.01 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.18
Maximum:	99.4
Units:	parts per million

Lu_ppm_2

Lutetium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.05 ppm; Upper detection limit = 5000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	113
Maximum:	113
Units:	parts per million

Nb_ppm_1

Niobium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.2 ppm; Upper detection limit = 2500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	5.6
Maximum:	965
Units:	parts per million

Nb_ppm_2

Niobium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 1 ppm; Upper detection limit = 5000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1250
Maximum:	1250
Units:	parts per million

Nd_ppm_1

Neodymium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	11.5
Maximum:	7180
Units:	parts per million

Nd_ppm_2

Neodymium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.5 ppm; Upper detection limit = 50000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	7420
Maximum:	7420
Units:	parts per million

Pr_ppm_1

Praseodymium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.03 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-2	Above detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	3.16
Maximum:	954
Units:	parts per million

Pr_ppm_2

Praseodymium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.2 ppm; Upper detection limit = 5000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	2220
Maximum:	2220
Units:	parts per million

Rb_ppm_1

Rubidium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	25.7
Maximum:	612
Units:	parts per million

Rb_ppm_2

Rubidium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 1 ppm; Upper detection limit = 50000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	65
Maximum:	65
Units:	parts per million

Sm_ppm_1

Samarium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.03 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-2	Above detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	2.3
Maximum:	526
Units:	parts per million

Sm_ppm_2

Samarium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.2 ppm; Upper detection limit = 5000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1295
Maximum:	1295
Units:	parts per million

Sn_ppm_1

Tin values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-2	Above detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	2
Maximum:	8600
Units:	parts per million

Sn_ppm_2

Tin values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 5 ppm; Upper detection limit = 50000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	6740
Maximum:	6740
Units:	parts per million

Sr_ppm_1

Strontium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	7.9
Maximum:	681
Units:	parts per million

Ta_ppm_1

Tantalum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.1 ppm; Upper detection limit = 2500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.6
Maximum:	235
Units:	parts per million

Ta_ppm_2

Tantalum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.5 ppm; Upper detection limit = 5000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	185
Maximum:	185
Units:	parts per million

Tb_ppm_1

Terbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.01 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.31
Maximum:	154.5
Units:	parts per million

Tb_ppm_2

Terbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.05 ppm; Upper detection limit = 5000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	178.5
Maximum:	178.5
Units:	parts per million

Th_ppm_1

Thorium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.05 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-2	Above detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	6.29
Maximum:	902
Units:	parts per million

Th_ppm_2

Thorium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.3 ppm; Upper detection limit = 5000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-2	Above detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Tl_ppm_1

Thallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.5 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.5
Maximum:	3
Units:	parts per million

Tm_ppm_1

Thulium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.01 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.19
Maximum:	108
Units:	parts per million

Tm_ppm_2

Thulium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.05 ppm; Upper detection limit = 5000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	111.5
Maximum:	111.5
Units:	parts per million

U_ppm_1

Uranium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.05 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1.64
Maximum:	547
Units:	parts per million

U_ppm_2

Uranium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.3 ppm; Upper detection limit = 5000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	619
Maximum:	619
Units:	parts per million

V_ppm_1

Vanadium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	7
Maximum:	438
Units:	parts per million

W_ppm_1

Tungsten values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	2
Maximum:	2900
Units:	parts per million

W_ppm_2

Tungsten values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 5 ppm; Upper detection limit = 50000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	2620
Maximum:	2620
Units:	parts per million

Y_ppm_1

Yttrium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	11.2
Maximum:	6660
Units:	parts per million

Y_ppm_2

Yttrium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 3 ppm; Upper detection limit = 50000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	6780
Maximum:	6780
Units:	parts per million

Yb_ppm_1

Ytterbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.03 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1.22
Maximum:	687
Units:	parts per million

Yb_ppm_2

Ytterbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.2 ppm; Upper detection limit = 5000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	748
Maximum:	748
Units:	parts per million

Zr_ppm_1

Zirconium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-2	Above detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	84
Maximum:	7150
Units:	parts per million

Zr_ppm_2

Zirconium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 10 ppm; Upper detection limit = 50000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. High sample to volume ratios were utilized to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	26700
Maximum:	26700
Units:	parts per million

Au_ppm

Gold values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Fire assay - aqua regia; Lower detection limit = 0.001 ppm; Upper detection limit = 10 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.
-4	Insufficient sample.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.001
Maximum:	6.02
Units:	parts per million

Pt_ppm

Platinum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Fire assay - aqua regia; Lower detection limit = 0.005 ppm; Upper detection limit = 10 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.
-4	Insufficient sample.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.005
Maximum:	0.038
Units:	parts per million

Pd_ppm

Palladium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Fire assay - aqua regia; Lower detection limit = 0.001 ppm; Upper detection limit = 10 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.
-4	Insufficient sample.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.001
Maximum:	0.006
Units:	parts per million

Ag_ppm

Silver values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.5 ppm; Upper detection limit = 100 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.5
Maximum:	2.8
Units:	parts per million

Al_pct

Aluminum values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 50 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1.59
Maximum:	10.05
Units:	percent

As_ppm

Arsenic values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	5
Maximum:	134
Units:	parts per million

Ba_ppm_2

Barium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	80
Maximum:	4540
Units:	parts per million

Be_ppm

Beryllium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.5 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.8
Maximum:	195
Units:	parts per million

Bi_ppm

Bismuth values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	2
Maximum:	79
Units:	parts per million

Ca_pct

Calcium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 50 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.02
Maximum:	6.77
Units:	percent

Cd_ppm

Cadmium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.5 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.5
Maximum:	1.4
Units:	parts per million

Co_ppm

Cobalt values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1
Maximum:	66
Units:	parts per million

Cr_ppm_2

Chromium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-2	Above detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	3
Maximum:	8710
Units:	parts per million

Cu_ppm

Copper values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	43
Units:	parts per million

Fe_pct

Iron values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 50 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.67
Maximum:	18.6
Units:	percent

Ga_ppm_2

Gallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	30
Units:	parts per million

K_pct

Potassium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 10 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.44
Maximum:	4.35
Units:	percent

La_ppm_3

Lanthanum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	10
Maximum:	8120
Units:	parts per million

Mg_pct

Magnesium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 50 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.03
Maximum:	3.74
Units:	percent

Mn_ppm

Manganese values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 5 ppm; Upper detection limit = 100000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	127
Maximum:	24800
Units:	parts per million

Mo_ppm

Molybdenum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	23
Units:	parts per million

Na_pct

Sodium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 10 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.04
Maximum:	2.92
Units:	percent

Ni_ppm

Nickel values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	202
Units:	parts per million

P_ppm

Phosphorus values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-2	Above detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	50
Maximum:	5190
Units:	parts per million

Pb_ppm

Lead values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-2	Above detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	5
Maximum:	95
Units:	parts per million

S_pct

Sulfur values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 10 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	0.17
Units:	percent

Sb_ppm

Antimony values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	5
Maximum:	28
Units:	parts per million

Sc_ppm

Scandium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1
Maximum:	49
Units:	parts per million

Sr_ppm_2

Strontium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	12
Maximum:	713
Units:	parts per million

Th_ppm_3

Thorium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 20 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	20
Maximum:	4020
Units:	parts per million

Ti_pct

Titanium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 10 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-2	Above detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.05
Maximum:	9.82
Units:	percent

Tl_ppm_2

Thallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	20
Units:	parts per million

U_ppm_3

Uranium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	410
Units:	parts per million

V_ppm_2

Vanadium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	6
Maximum:	348
Units:	parts per million

W_ppm_3

Tungsten values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	2610
Units:	parts per million

Zn_ppm

Zinc values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	10
Maximum:	502
Units:	parts per million

rdf2013-5-rock-major-minor-oxide-trace-element-ree.csv, rdf2013-5-rock-major-minor-oxide-trace-element-ree-limits.csv

Major- and minor-oxide, trace-element, and rare-earth-element analysis of pulverized rock samples . (Source: Alaska Division of Geological & Geophysical Surveys)

Station

Latitude

Latitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

Range of values
Minimum:	65.713882
Maximum:	66.74655
Units:	decimal degrees

Longitude

Longitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

Range of values
Minimum:	-151.69061
Maximum:	-149.769035
Units:	decimal degrees

Weight_kg

Sample weight in kilograms (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex)

Range of values
Minimum:	0.28
Maximum:	7.46
Units:	kilograms

Map_Unit_Name

When possible, we indicate our interpretation of the geologic map unit associated with rock samples. Map unit names are derived from nomenclature or map unit labeling provided in pre-existing literature. Questionable unit interpretations are noted in the corresponding "Description" field of the table. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
unknown	The map unit could not be determined.
Bonanza Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Bonanza Pluton unit described in Patton, W.W., Jr. and Miller, T.P., 1973, Bedrock geologic map of Bettles and southern part of Wiseman quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map 492, 1 sheet, scale 1:250,000
Coal Creek Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Coal Creek Pluton unit described in Barker, J.C. and Foley, J.Y., 1986, Tin reconnaissance of the Kanuti and Hodzana Rivers uplands, central Alaska: U.S. Bureau of Mines Information Circular 9104, 27 p.
Fort Hamlin Hills Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Fort Hamlin Hills Pluton unit described in Barker, J.C. and Foley, J.Y., 1986, Tin reconnaissance of the Kanuti and Hodzana Rivers uplands, central Alaska: U.S. Bureau of Mines Information Circular 9104, 27 p.
Hot Springs Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Hot Springs Pluton unit described in Patton, W.W., Jr. and Miller, T.P., 1973, Bedrock geologic map of Bettles and southern part of Wiseman quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map 492, 1 sheet, scale 1:250,000
Kanuti Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Kanuti Pluton unit described in Miller, Thomas P., 1989, Contrasting plutonic rock suites of the Yukon-Koyukuk Basin and the Ruby Geanticline, Alaska: Journal of Geophysical Research, vol. 94, no. B11, p. 969-987
Ray Mountains Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Ray Mountains Pluton unit described in Miller, Thomas P., 1989, Contrasting plutonic rock suites of the Yukon-Koyukuk Basin and the Ruby Geanticline, Alaska: Journal of Geophysical Research, vol. 94, no. B11, p. 969-987
Ray River Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Ray River Pluton unit described in Barker, J.C. and Foley, J.Y., 1986, Tin reconnaissance of the Kanuti and Hodzana Rivers uplands, central Alaska: U.S. Bureau of Mines Information Circular 9104, 27 p.
Ruby Terrane	Field context and/or geochemical analysis indicate that this sample is associated with the Ruby Terrane unit described in Jones, D.L., Silberling, N.J., Coney, P.J., and Plafker, George, 1987, Lithotectonic terrane map of Alaska (west of the 141st meridian): U.S. Geological Survey Miscellaneous Field Studies Map 1874-A, 1 sheet, scale 1:2,500,000
Sithylemenkat Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Sithylemenkat Pluton unit described in Patton, W.W., Jr. and Miller, T.P., 1970, Preliminary geologic investigations in the Kanuti River region, Alaska: U.S. Geological Survey Bulletin 1312-J, p. J1-J10.
Tozitna Terrane	Field context and/or geochemical analysis indicate that this sample is associated with the Tozitna Terrane unit described in Jones, D.L., Silberling, N.J., Coney, P.J., and Plafker, George, 1987, Lithotectonic terrane map of Alaska (west of the 141st meridian): U.S. Geological Survey Miscellaneous Field Studies Map 1874-A, 1 sheet, scale 1:2,500,000

Description

Description of the sample. (Source: Alaska Division of Geological & Geophysical Surveys)

Characters 1 to 254 of a brief sample and/or station description.

Descrip_2

Extension of the sample and/or station description for descriptions which are greater than 254 characters in length. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Characters greater than 255 of the sample and/or station description.

SiO2_pct

Silicon dioxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Range of values
Minimum:	45.33
Maximum:	76.76
Units:	percent

Al2O3_pct

Aluminum oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Range of values
Minimum:	11.64
Maximum:	22.22
Units:	percent

Fe2O3_pct

Iron oxide (+3) values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Range of values
Minimum:	0.61
Maximum:	11
Units:	percent

CaO_pct

Calcium Oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Range of values
Minimum:	0.05
Maximum:	16.19
Units:	percent

MgO_pct

Magnesium oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Range of values
Minimum:	0.03
Maximum:	12.28
Units:	percent

Na2O_pct

Sodium Oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Range of values
Minimum:	0.86
Maximum:	4.09
Units:	percent

K2O_pct

Potassium oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Range of values
Minimum:	0.02
Maximum:	7.81
Units:	percent

Cr2O3_pct

Chromium Oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	0.11
Units:	percent

TiO2_pct

Titanium dioxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Range of values
Minimum:	0.03
Maximum:	1.76
Units:	percent

MnO_pct

Manganese oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Range of values
Minimum:	0.01
Maximum:	0.2
Units:	percent

P2O5_pct

Phosphorus oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Range of values
Minimum:	0.009
Maximum:	0.855
Units:	percent

SrO_pct

Strontium Oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	0.12
Units:	percent

BaO_pct

Barium Oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	0.22
Units:	percent

LOI_pct

Loss on Ignition values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Range of values
Minimum:	0.29
Maximum:	3.79
Units:	percent

Total_pct

Total values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Range of values
Minimum:	98.16
Maximum:	99.99
Units:	percent

Ba_ppm

Range of values
Minimum:	5
Maximum:	2000
Units:	parts per million

Ce_ppm

Range of values
Minimum:	1
Maximum:	244
Units:	parts per million

Cr_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	800
Units:	parts per million

Cs_ppm

Range of values
Minimum:	0.55
Maximum:	95.8
Units:	parts per million

Dy_ppm

Range of values
Minimum:	0.53
Maximum:	17.25
Units:	parts per million

Er_ppm

Range of values
Minimum:	0.3
Maximum:	11.95
Units:	parts per million

Eu_ppm

Range of values
Minimum:	0.04
Maximum:	2.91
Units:	parts per million

Ga_ppm

Gallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.1 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Range of values
Minimum:	13.6
Maximum:	25.4
Units:	parts per million

Gd_ppm

Range of values
Minimum:	0.55
Maximum:	16.3
Units:	parts per million

Hf_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1.7
Maximum:	14.8
Units:	parts per million

Ho_ppm

Range of values
Minimum:	0.11
Maximum:	3.8
Units:	parts per million

La_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	4.2
Maximum:	132.5
Units:	parts per million

Lu_ppm

Range of values
Minimum:	0.04
Maximum:	1.9
Units:	parts per million

Nb_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1.5
Maximum:	48.5
Units:	parts per million

Nd_ppm

Range of values
Minimum:	1
Maximum:	97
Units:	parts per million

Pr_ppm

Range of values
Minimum:	0.18
Maximum:	29.3
Units:	parts per million

Rb_ppm

Range of values
Minimum:	1.4
Maximum:	896
Units:	parts per million

Sm_ppm

Range of values
Minimum:	0.41
Maximum:	15.95
Units:	parts per million

Sn_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	101
Units:	parts per million

Sr_ppm

Range of values
Minimum:	5.4
Maximum:	1135
Units:	parts per million

Ta_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.1
Maximum:	15
Units:	parts per million

Tb_ppm

Range of values
Minimum:	0.09
Maximum:	2.98
Units:	parts per million

Th_ppm

Range of values
Minimum:	0.06
Maximum:	88.3
Units:	parts per million

Tl_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.8
Maximum:	4.2
Units:	parts per million

Tm_ppm

Range of values
Minimum:	0.05
Maximum:	1.9
Units:	parts per million

U_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.2
Maximum:	22.4
Units:	parts per million

V_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	5
Maximum:	272
Units:	parts per million

W_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	25
Units:	parts per million

Y_ppm

Range of values
Minimum:	2.8
Maximum:	121
Units:	parts per million

Yb_ppm

Range of values
Minimum:	0.25
Maximum:	12.95
Units:	parts per million

Zr_ppm

Range of values
Minimum:	4
Maximum:	499
Units:	parts per million

rdf2013-5-rock-trace-element-ree.csv, rdf2013-5-rock-trace-element-ree-limits.csv

Trace-element and rare-earth-element analysis of pulverized rock samples. (Source: Alaska Division of Geological & Geophysical Surveys)

Station

Latitude

Latitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

Range of values
Minimum:	65.716771
Maximum:	66.78137
Units:	decimal degrees

Longitude

Longitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

Range of values
Minimum:	-151.527516
Maximum:	-149.800553
Units:	decimal degrees

Weight_kg

Sample weight in kilograms (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex)

Range of values
Minimum:	0.07
Maximum:	3.68
Units:	kilograms

Description

Description of the sample. (Source: Alaska Division of Geological & Geophysical Surveys)

Characters 1 to 254 of a brief sample and/or station description.

Descrip_2

Extension of the sample and/or station description for descriptions which are greater than 254 characters in length. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Characters greater than 255 of the sample and/or station description.

Ba_ppm_1

Range of values
Minimum:	2.7
Maximum:	5690
Units:	parts per million

Ce_ppm

Cerium values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.5
Maximum:	504
Units:	parts per million

Cr_ppm_1

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	380
Units:	parts per million

Cs_ppm

Range of values
Minimum:	0.12
Maximum:	118
Units:	parts per million

Dy_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.05
Maximum:	63.5
Units:	parts per million

Er_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.03
Maximum:	60.1
Units:	parts per million

Eu_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.03
Maximum:	2.94
Units:	parts per million

Ga_ppm_1

Gallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.1 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Range of values
Minimum:	0.6
Maximum:	64.6
Units:	parts per million

Gd_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.05
Maximum:	30.1
Units:	parts per million

Hf_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.2
Maximum:	11.7
Units:	parts per million

Ho_ppm

Range of values
Minimum:	0.01
Maximum:	16.05
Units:	parts per million

La_ppm_1

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.6
Maximum:	542
Units:	parts per million

Lu_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	10.85
Units:	parts per million

Nb_ppm

Range of values
Minimum:	0.2
Maximum:	86.4
Units:	parts per million

Nb_pct

Niobium values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 10 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Nd_ppm

Range of values
Minimum:	0.1
Maximum:	294
Units:	parts per million

Pr_ppm

Range of values
Minimum:	0.03
Maximum:	94.6
Units:	parts per million

Rb_ppm

Range of values
Minimum:	0.9
Maximum:	1905
Units:	parts per million

Sm_ppm

Range of values
Minimum:	0.03
Maximum:	38.9
Units:	parts per million

Sn_ppm

Value	Definition
-1	Below detection limit.
-2	Above detection limit.

Range of values
Minimum:	1
Maximum:	8540
Units:	parts per million

Sn_pct

Tin values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 60 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1.01
Maximum:	2.57
Units:	percent

Sr_ppm_1

Range of values
Minimum:	0.2
Maximum:	1140
Units:	parts per million

Ta_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.1
Maximum:	39
Units:	parts per million

Tb_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	7.72
Units:	parts per million

Th_ppm_1

Range of values
Minimum:	0.09
Maximum:	120.5
Units:	parts per million

Tl_ppm_1

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.5
Maximum:	10.2
Units:	parts per million

Tm_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	10.4
Units:	parts per million

U_ppm_1

Value	Definition
-2	Above detection limit.

Range of values
Minimum:	0.06
Maximum:	668
Units:	parts per million

V_ppm_1

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	5
Maximum:	540
Units:	parts per million

W_ppm_1

Value	Definition
-1	Below detection limit.
-2	Above detection limit.

Range of values
Minimum:	1
Maximum:	4240
Units:	parts per million

Y_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.6
Maximum:	572
Units:	parts per million

Yb_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.03
Maximum:	70.5
Units:	parts per million

Zr_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	2
Maximum:	422
Units:	parts per million

Au_ppm_1

Value	Definition
-1	Below detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.001
Maximum:	0.14
Units:	parts per million

Au_ppm_2

Value	Definition
-1	Below detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.001
Maximum:	0.005
Units:	parts per million

Pt_ppm

Value	Definition
-1	Below detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.005
Maximum:	0.011
Units:	parts per million

Pd_ppm

Value	Definition
-1	Below detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.001
Maximum:	0.013
Units:	parts per million

Ag_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.5
Maximum:	52.3
Units:	parts per million

Al_pct

Range of values
Minimum:	0.04
Maximum:	12.85
Units:	percent

As_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	5
Maximum:	8240
Units:	parts per million

Ba_ppm_2

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	5230
Units:	parts per million

Be_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.5
Maximum:	205
Units:	parts per million

Bi_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	2
Maximum:	955
Units:	parts per million

Ca_pct

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	15.5
Units:	percent

Cd_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.5
Maximum:	208
Units:	parts per million

Co_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	51
Units:	parts per million

Cr_ppm_2

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	245
Units:	parts per million

Cu_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	1300
Units:	parts per million

Fe_pct

Range of values
Minimum:	0.28
Maximum:	27.2
Units:	percent

Ga_ppm_2

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	60
Units:	parts per million

K_pct

Range of values
Minimum:	0.01
Maximum:	6.04
Units:	percent

La_ppm_2

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	440
Units:	parts per million

Mg_pct

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	6.07
Units:	percent

Mn_ppm

Range of values
Minimum:	32
Maximum:	31800
Units:	parts per million

Mo_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	491
Units:	parts per million

Na_pct

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	4.51
Units:	percent

Ni_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	203
Units:	parts per million

P_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	1990
Units:	parts per million

Pb_ppm

Lead values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be above instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	2
Maximum:	23900
Units:	parts per million

Pb_pct

Lead values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3-HClO4-HF+HCl; Lower detection limit = 0.001 pct; Upper detection limit = 20 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1.31
Maximum:	2.39
Units:	percent

S_pct

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	3.02
Units:	percent

Sb_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	5
Maximum:	760
Units:	parts per million

Sc_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	48
Units:	parts per million

Sr_ppm_2

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	1270
Units:	parts per million

Th_ppm_2

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	20
Maximum:	110
Units:	parts per million

Ti_pct

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	1.23
Units:	percent

Tl_ppm_2

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	10
Units:	parts per million

U_ppm_2

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	1280
Units:	parts per million

U_pct

Uranium values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 15 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.14
Maximum:	0.15
Units:	percent

V_ppm_2

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	438
Units:	parts per million

W_ppm_2

Value	Definition
-1	Below detection limit.
-2	Above detection limit.

Range of values
Minimum:	10
Maximum:	7040
Units:	parts per million

W_pct

Tungsten values measured in percent (pct); Method: X-Ray Fluorescence (XRF), Lithium Borate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 50 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1.06
Maximum:	1.89
Units:	percent

Zn_ppm

Zinc values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be above instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	2
Maximum:	19700
Units:	parts per million

Zn_pct

Zinc values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3-HClO4-HF+HCl; Lower detection limit = 0.001 pct; Upper detection limit = 30 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1.97
Maximum:	1.97
Units:	percent

rdf2013-5-slab-xrf-major-minor-oxide-trace-element.csv, rdf2013-5-slab-xrf-major-minor-oxide-trace-element-limits.csv

Major- and minor-oxide and trace-element analysis of rock-slab samples. (Source: Alaska Division of Geological & Geophysical Surveys)

Station

Latitude

Latitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

Range of values
Minimum:	65.685163
Maximum:	66.788106
Units:	decimal degrees

Longitude

Longitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

Range of values
Minimum:	-151.543808
Maximum:	-149.816176
Units:	decimal degrees

Map_Unit_Name

Value	Definition
unknown	The map unit could not be determined.
Bonanza Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Bonanza Pluton unit described in Patton, W.W., Jr. and Miller, T.P., 1973, Bedrock geologic map of Bettles and southern part of Wiseman quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map 492, 1 sheet, scale 1:250,000
Coal Creek Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Coal Creek Pluton unit described in Barker, J.C. and Foley, J.Y., 1986, Tin reconnaissance of the Kanuti and Hodzana Rivers uplands, central Alaska: U.S. Bureau of Mines Information Circular 9104, 27 p.
Fort Hamlin Hills Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Fort Hamlin Hills Pluton unit described in Barker, J.C. and Foley, J.Y., 1986, Tin reconnaissance of the Kanuti and Hodzana Rivers uplands, central Alaska: U.S. Bureau of Mines Information Circular 9104, 27 p.
Hot Springs Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Hot Springs Pluton unit described in Patton, W.W., Jr. and Miller, T.P., 1973, Bedrock geologic map of Bettles and southern part of Wiseman quadrangles, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map 492, 1 sheet, scale 1:250,000
Kanuti Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Kanuti Pluton unit described in Miller, Thomas P., 1989, Contrasting plutonic rock suites of the Yukon-Koyukuk Basin and the Ruby Geanticline, Alaska: Journal of Geophysical Research, vol. 94, no. B11, p. 969-987
Ray Mountains Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Ray Mountains Pluton unit described in Miller, Thomas P., 1989, Contrasting plutonic rock suites of the Yukon-Koyukuk Basin and the Ruby Geanticline, Alaska: Journal of Geophysical Research, vol. 94, no. B11, p. 969-987
Ray River Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Ray River Pluton unit described in Barker, J.C. and Foley, J.Y., 1986, Tin reconnaissance of the Kanuti and Hodzana Rivers uplands, central Alaska: U.S. Bureau of Mines Information Circular 9104, 27 p.
Ruby Terrane	Field context and/or geochemical analysis indicate that this sample is associated with the Ruby Terrane unit described in Jones, D.L., Silberling, N.J., Coney, P.J., and Plafker, George, 1987, Lithotectonic terrane map of Alaska (west of the 141st meridian): U.S. Geological Survey Miscellaneous Field Studies Map 1874-A, 1 sheet, scale 1:2,500,000
Sithylemenkat Pluton	Field context and/or geochemical analysis indicate that this sample is associated with the Sithylemenkat Pluton unit described in Patton, W.W., Jr. and Miller, T.P., 1970, Preliminary geologic investigations in the Kanuti River region, Alaska: U.S. Geological Survey Bulletin 1312-J, p. J1-J10.
Tb	Field context and/or geochemical analysis indicate that this sample is associated with the Tb unit described in Albanese, M.D., 1987, A basalt flow in the Fort Hamlin Hills, Bettles A-1 Quadrangle, Alaska: Alaska Division of Geological & Geophysical Surveys Public Data File 87-25, 11 p.
Tozitna Terrane	Field context and/or geochemical analysis indicate that this sample is associated with the Tozitna Terrane unit described in Jones, D.L., Silberling, N.J., Coney, P.J., and Plafker, George, 1987, Lithotectonic terrane map of Alaska (west of the 141st meridian): U.S. Geological Survey Miscellaneous Field Studies Map 1874-A, 1 sheet, scale 1:2,500,000
Tv	Field context and/or geochemical analysis indicate that this sample is associated with the Tv unit described in Patton, W.W., Jr. and Miller, T.P., 1970, Preliminary geologic investigations in the Kanuti River region, Alaska: U.S. Geological Survey Bulletin 1312-J, p. J1-J10 (corresponds to map unit TVk)
unnamed dike	Field context and/or geochemical analysis indicate that this sample is associated with the unnamed dike unit described in Patton, W.W., Jr., Miller, T.P., and Box, S.E., 1989, Dalton Highway road log from Yukon Crossing (Mile 56) to South Fork Koyukuk River (Mile 15.2), in Mull, C.G. and Adams, K.E., ed., Bedrock geology of the eastern Koyukuk Basin, central Brooks Range, and east-central Arctic Slope along the Dalton Highway, Yukon River to Prudhoe Bay, Alaska: Alaska Division of Geological & Geophysical Surveys Guidebook 7-7A, p. 59-73.(see discussion of Prospect Creek area)

Description

Description of the sample. (Source: Alaska Division of Geological & Geophysical Surveys)

Characters 1 to 254 of a brief sample and/or station description.

Descrip_2

Extension of the sample and/or station description for descriptions which are greater than 254 characters in length. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Characters greater than 255 of the sample and/or station description.

SiO2_pct

Silicon dioxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF); Lower detection limit = 0.1 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Range of values
Minimum:	25.3
Maximum:	93.64
Units:	percent

Al2O3_pct

Aluminum oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF); Lower detection limit = 0.05 pct; Upper detection limit = 75 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Range of values
Minimum:	2.2
Maximum:	20.72
Units:	percent

BaO_pct

Barium Oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF); Lower detection limit = 0.03 pct; Upper detection limit = 75 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	1.38
Units:	percent

CaO_pct

Calcium Oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF); Lower detection limit = 0.02 pct; Upper detection limit = 75 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Range of values
Minimum:	0.03
Maximum:	17
Units:	percent

FeO_pct

Iron oxide (+2) values measured in percent (pct); Method: X-Ray Fluorescence (XRF); Lower detection limit = 0.03 pct; Upper detection limit = 75 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.07
Maximum:	48.1
Units:	percent

K2O_pct

Potassium oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF); Lower detection limit = 0.02 pct; Upper detection limit = 75 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Range of values
Minimum:	0.69
Maximum:	10.92
Units:	percent

MgO_pct

Magnesium oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF); Lower detection limit = 0.05 pct; Upper detection limit = 75 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Range of values
Minimum:	0.02
Maximum:	8.8
Units:	percent

MnO_pct

Manganese oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF); Lower detection limit = 0.03 pct; Upper detection limit = 75 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	2.36
Units:	percent

Na2O_pct

Sodium Oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF); Lower detection limit = 0.02 pct; Upper detection limit = 75 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Range of values
Minimum:	0.01
Maximum:	6.36
Units:	percent

P2O5_pct

Phosphorus oxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF); Lower detection limit = 0.03 pct; Upper detection limit = 75 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	1.14
Units:	percent

TiO2_pct

Titanium dioxide values measured in percent (pct); Method: X-Ray Fluorescence (XRF); Lower detection limit = 0.02 pct; Upper detection limit = 75 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Range of values
Minimum:	0.01
Maximum:	3.68
Units:	percent

F_pct

Fluorine values measured in percent (pct); Method: X-Ray Fluorescence (XRF); Lower detection limit = 0.01 pct; Upper detection limit = 10 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	0.53
Units:	percent

Cl_pct

Chlorine values measured in percent (pct); Method: X-Ray Fluorescence (XRF); Lower detection limit = 0.01 pct; Upper detection limit = 10 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	0.38
Units:	percent

S_pct

Sulfur values measured in percent (pct); Method: X-Ray Fluorescence (XRF); Lower detection limit = 0.007 pct; Upper detection limit = 50 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	3.48
Units:	percent

Total_pct

Total values measured in percent (pct); Method: X-Ray Fluorescence (XRF); Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be slightly above or below 100% due to instrumental error. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Range of values
Minimum:	96.6
Maximum:	101.79
Units:	percent

Ag_ppm

Silver values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	122
Maximum:	122
Units:	parts per million

As_ppm

Arsenic values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 4 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.11
Maximum:	301
Units:	parts per million

Bi_ppm

Bismuth values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 2 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	32.5
Maximum:	256
Units:	parts per million

Cr_ppm

Chromium values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 30 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	39.6
Maximum:	421
Units:	parts per million

Cu_ppm

Copper values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 7 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.9
Maximum:	3410
Units:	parts per million

Ga_ppm

Gallium values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 10 ppm; Upper detection limit = 100000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	8.12
Maximum:	59.7
Units:	parts per million

Mo_ppm

Molybdenum values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 1 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	5.66
Maximum:	142
Units:	parts per million

Ni_ppm

Nickel values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 7 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	25.7
Maximum:	203
Units:	parts per million

V_ppm

Vanadium values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 25 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	83.2
Maximum:	680
Units:	parts per million

W_ppm

Tungsten values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 8 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	5.8
Maximum:	48
Units:	parts per million

Zn_ppm

Zinc values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 8 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	9.5
Maximum:	2900
Units:	parts per million

Rb_ppm

Rubidium values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 1 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.75
Maximum:	854.15
Units:	parts per million

Sr_ppm

Strontium values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 1 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Range of values
Minimum:	2.55
Maximum:	1616.6
Units:	parts per million

Y_ppm

Yttrium values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 1 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Range of values
Minimum:	3.7
Maximum:	120.6
Units:	parts per million

Zr_ppm

Zirconium values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 9 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Range of values
Minimum:	7.25
Maximum:	352.75
Units:	parts per million

Nb_ppm

Niobium values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 1 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Range of values
Minimum:	0.9
Maximum:	49.9
Units:	parts per million

Ce_ppm

Cerium values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 20 ppm; Upper detection limit = 500000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	7.8
Maximum:	310.9
Units:	parts per million

Pb_ppm

Lead values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 4 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-4	Insufficient sample.

Range of values
Minimum:	0.3
Maximum:	1016.2
Units:	parts per million

Th_ppm

Thorium values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 2 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.3
Maximum:	199.3
Units:	parts per million

U_ppm

Uranium values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 1 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.2
Maximum:	47.6
Units:	parts per million

Sn_ppm

Tin values measured in parts per million (ppm); Method: X-Ray Fluorescence (XRF); Lower detection limit = 4 ppm; Upper detection limit = 750000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be below instrumentation detection limits. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.3
Maximum:	2483
Units:	parts per million

rdf2013-5-stream-sed-trace-element-ree.csv, rdf2013-5-stream-sed-trace-element-ree-limits.csv

Trace-element and rare-earth-element analysis of stream-sediment and soil samples. (Source: Alaska Division of Geological & Geophysical Surveys)

Station

Latitude

Latitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

Range of values
Minimum:	65.627367
Maximum:	66.794508
Units:	decimal degrees

Longitude

Longitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

Range of values
Minimum:	-151.717019
Maximum:	-149.925098
Units:	decimal degrees

Weight_kg

Sample weight in kilograms (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics)

Range of values
Minimum:	0.37
Maximum:	4.23
Units:	kilograms

Mesh_Size

Mesh size used to sieve stream sediment and soil samples. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
-35	The sample was sieved to a particle size of less than 500 microns prior to analysis.
-80	The sample was sieved to a particle size of less than 180 microns prior to analysis

Stream_W

The estimated average width of stream at the sample site. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Range of values
Minimum:	0.1
Maximum:	60
Units:	meters

Stream_D

The estimated depth of stream at the sample site. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Range of values
Minimum:	0.1
Maximum:	3
Units:	meters

Stream_Spd

Qualitative description of the stream flow rate and stream channel morphology at the field station where the sample was collected.. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.
stagnant	no apparent current, bed is composed of organics, silt or sand, and banks are composed of silt and organics, no gravel is present.
slow	slow current, few riffles, bed and banks are composed of gravel and sand, minor cobbles and silt, organics may be present.
swift	fast moving water, many riffles, bed and bank are composed of cobbles and gravel with minor sand.
tumbling	step-wise flows with plunges and pools, bed and banks are composed of boulders and cobbles with minor gravel and finer sediment.
slow-stagnant	very slow current with stagnant pools, bed is comprised of sand and banks are composed of silt; organics and a small amount of gravel may be present.
swift-slow	varied flow rate and channel morphology, bed and banks are composed of gravel and sand, banks are composed of sand, silt and minor gravel; cobbles and organics may be present.
tumbling-swift-slow	varied flow rate and channel morphology with intermittent step-wise plunges and pools, bed and banks are variable and may be composed of boulders, cobbles, gravel, sand, or silt organics may be present.
tumbling-slow	slow current with few riffles and intermittent step-wise plunges and pools, bed and banks are variable and may be composed of cobbles, gravel, sand, or silt, organics may be present.
tumbling-swift	fast moving water with many riffles and intermittent step-wise flows with plunges and pools, bed and banks are composed of boulders and cobbles with minor gravel and finer sediment.

Stream_Ord

Relative magnitude of the stream based on its position within the tributary hierarchy of the drainage basin.. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Formal codeset
Codeset Name:	Numeric values were assigned according to Strahler, A. N. (1957) classification system.
Codeset Source:	Strahler, A. N. (1957), Quantitative analysis of watershed geomorphology: Transactions of the American Geophysical Union Vol 38, p. 913-920.

Stream_Sit

The type of material that forms the bed and banks of the sampled stream channel.. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.
alluvium	Natural unconsolidated aggregate deposited by rivers, streams and creeks.
colluvium	Natural unconsolidated aggregate resulting from down slope movement of loose rocks and soil.
bedrock	Solid in situ rock and boulders that have not been transported.

Grain_Size

Estimated classification of the size of material that is the source of the sample. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Formal codeset
Codeset Name:	Unified Soil Classification System (USCS)
Codeset Source:	United States Army Engineer Waterways Experiment Station (1960), The Unified Soil Classification System: Technical Memorandum No. 3-357, U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS.

Source

Description of depositional environment of the specific sample site. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.
point-bar	Gravel or sand deposited at the downstream end of a gravel bar.
boulder/log-eddy	Gravel or sand deposited downstream of an obstruction such as a log or boulder.
gravel-armor	Sediment trapped below pebble or cobble pavement at the leading edge of a gravel bar.
moss-mat	Sand or gravel trapped in a moss mat in the main channel or bank of a creek.
plunge-pool	Sand or gravel deposited at the edge of a pool below a water fall.

Num_Sites

Number of sample sites at the station. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Range of values
Minimum:	1
Maximum:	6

Dist_Samp

The distance between the creek bed and the sample site. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Range of values
Minimum:	0.25
Maximum:	42
Units:	meters

Sed_Colors

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

The color selection values used in this table are: "black"; "black, brown"; "black, orange"; "black, white"; "brown"; "brown, black"; "brown, orange"; "brown, red"; "brown, white"; "brown, yellow"; "orange"; "orange, brown"; "orange, red"; "red, brown"; "red, orange"; "white ";

Intensity

Intensity of the chemical or biogenic precipitate on the stream bed material qualitatively assigned by the sampler. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.
weak	Precipitate binds otherwise unconsolidated deposits.
heavy	Obscures the texture and color of the stream bed materials.
moderate	Obscures the color of the stream bed materials.

Description

Description of the sample. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Characters 1 to 254 of a brief sample and/or station description.

Ba_ppm_1

Range of values
Minimum:	115.5
Maximum:	1905
Units:	parts per million

Ce_ppm

Range of values
Minimum:	32.6
Maximum:	3070
Units:	parts per million

Cr_ppm_1

Range of values
Minimum:	10
Maximum:	2900
Units:	parts per million

Cs_ppm

Range of values
Minimum:	2.12
Maximum:	142
Units:	parts per million

Dy_ppm

Range of values
Minimum:	2.56
Maximum:	158
Units:	parts per million

Er_ppm

Range of values
Minimum:	1.56
Maximum:	100
Units:	parts per million

Eu_ppm

Range of values
Minimum:	0.17
Maximum:	5.47
Units:	parts per million

Ga_ppm_1

Gallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.1 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Range of values
Minimum:	10.7
Maximum:	117
Units:	parts per million

Gd_ppm

Range of values
Minimum:	2.75
Maximum:	158.5
Units:	parts per million

Hf_ppm

Range of values
Minimum:	2.4
Maximum:	150
Units:	parts per million

Ho_ppm

Range of values
Minimum:	0.51
Maximum:	32.4
Units:	parts per million

La_ppm_1

Range of values
Minimum:	14.9
Maximum:	1515
Units:	parts per million

Lu_ppm

Range of values
Minimum:	0.28
Maximum:	15.25
Units:	parts per million

Nb_ppm

Niobium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Range of values
Minimum:	6.8
Maximum:	158.5
Units:	parts per million

Nd_ppm

Range of values
Minimum:	12.7
Maximum:	1130
Units:	parts per million

Pr_ppm

Range of values
Minimum:	3.71
Maximum:	334
Units:	parts per million

Rb_ppm

Range of values
Minimum:	36.4
Maximum:	898
Units:	parts per million

Sm_ppm

Range of values
Minimum:	2.89
Maximum:	200
Units:	parts per million

Sn_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	1635
Units:	parts per million

Sr_ppm_1

Range of values
Minimum:	25.4
Maximum:	761
Units:	parts per million

Ta_ppm

Tantalum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution; Lower detection limit = 0.1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Range of values
Minimum:	0.5
Maximum:	35.6
Units:	parts per million

Tb_ppm

Range of values
Minimum:	0.44
Maximum:	25.5
Units:	parts per million

Th_ppm_1

Range of values
Minimum:	5.03
Maximum:	792
Units:	parts per million

Tl_ppm_1

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.5
Maximum:	4.3
Units:	parts per million

Tm_ppm

Range of values
Minimum:	0.25
Maximum:	15.8
Units:	parts per million

U_ppm_1

Range of values
Minimum:	1.75
Maximum:	727
Units:	parts per million

V_ppm_1

Range of values
Minimum:	6
Maximum:	272
Units:	parts per million

W_ppm_1

Range of values
Minimum:	1
Maximum:	521
Units:	parts per million

Y_ppm

Range of values
Minimum:	14.5
Maximum:	893
Units:	parts per million

Yb_ppm

Range of values
Minimum:	1.72
Maximum:	98.1
Units:	parts per million

Zr_ppm

Range of values
Minimum:	69
Maximum:	5720
Units:	parts per million

Ag_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.5
Maximum:	2.9
Units:	parts per million

Al_pct

Range of values
Minimum:	3.8
Maximum:	11.1
Units:	percent

As_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	5
Maximum:	1920
Units:	parts per million

Ba_ppm_2

Range of values
Minimum:	120
Maximum:	1980
Units:	parts per million

Be_ppm

Range of values
Minimum:	0.9
Maximum:	28
Units:	parts per million

Bi_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	2
Maximum:	44
Units:	parts per million

Ca_pct

Range of values
Minimum:	0.04
Maximum:	5.09
Units:	percent

Cd_ppm

Cadmium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.5 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and University of Alaska Fairbanks, Department of Geology & Geophysics.)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.5
Maximum:	3.3
Units:	parts per million

Co_ppm

Range of values
Minimum:	1
Maximum:	292
Units:	parts per million

Cr_ppm_2

Range of values
Minimum:	5
Maximum:	4400
Units:	parts per million

Cu_ppm

Range of values
Minimum:	1
Maximum:	178
Units:	parts per million

Fe_pct

Range of values
Minimum:	0.77
Maximum:	11.2
Units:	percent

Ga_ppm_2

Range of values
Minimum:	10
Maximum:	110
Units:	parts per million

K_pct

Range of values
Minimum:	0.68
Maximum:	4.54
Units:	percent

La_ppm_2

Range of values
Minimum:	10
Maximum:	1700
Units:	parts per million

Mg_pct

Range of values
Minimum:	0.05
Maximum:	3.2
Units:	percent

Mn_ppm

Range of values
Minimum:	88
Maximum:	24100
Units:	parts per million

Mo_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	29
Units:	parts per million

Na_pct

Range of values
Minimum:	0.09
Maximum:	3.17
Units:	percent

Ni_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	2
Maximum:	365
Units:	parts per million

P_ppm

Range of values
Minimum:	70
Maximum:	3350
Units:	parts per million

Pb_ppm

Range of values
Minimum:	8
Maximum:	189
Units:	parts per million

S_pct

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	0.33
Units:	percent

Sb_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	5
Maximum:	169
Units:	parts per million

Sc_ppm

Range of values
Minimum:	2
Maximum:	33
Units:	parts per million

Sr_ppm_2

Range of values
Minimum:	23
Maximum:	829
Units:	parts per million

Th_ppm_2

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	20
Maximum:	960
Units:	parts per million

Ti_pct

Range of values
Minimum:	0.05
Maximum:	1.53
Units:	percent

Tl_ppm_2

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	10
Units:	parts per million

U_ppm_2

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	810
Units:	parts per million

V_ppm_2

Range of values
Minimum:	7
Maximum:	237
Units:	parts per million

W_ppm_2

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	280
Units:	parts per million

Zn_ppm

Range of values
Minimum:	17
Maximum:	743
Units:	parts per million

Au_ppm

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.001
Maximum:	0.182
Units:	parts per million

Pt_ppm

Value	Definition
-1	Below detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.005
Maximum:	0.032
Units:	parts per million

Pd_ppm

Value	Definition
-1	Below detection limit.
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	0.001
Maximum:	0.007
Units:	parts per million

rdf2013-5-sample-location-details-no-suitable-media.csv

List of visited locations in which samples were not collected for reasons noted. (Source: Alaska Division of Geological & Geophysical Surveys)

Station

Value	Definition
NO SAMPLE	Provides coordinate values for visited or observed sites in which 1) the location was not assigned a station identifier, and 2) a sample was not collected.

Latitude

Latitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

Range of values
Minimum:	65.666405
Maximum:	66.771956
Units:	decimal degrees

Longitude

Longitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

Range of values
Minimum:	-151.212082
Maximum:	-149.756801
Units:	decimal degrees

Description

Description of the sample. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	Blank (NULL) field values indicate that this data was not recorded by the sample collector.

Characters 1 to 254 of a brief sample and/or station description.

Who produced the data set?

Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
- Bachmann, E.N.
- Blessington, M.J.
- Freeman, L.K.
- Newberry, R.J.
- Tuzzolino, A.L.
- Wright, T.C.
- Wylie, William
Who also contributed to the data set?

Analyses were paid for by the State of Alaska's Strategic and Critical Minerals Assessment CIP, which is funded by the Alaska State Legislature and managed by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys.
To whom should users address questions about the data?

Alaska Division of Geological & Geophysical Surveys
Attn: James Weakland
GIS Analyst
3354 College Road
Fairbanks, AK 99709-3707
USA

(907)451-5029 (voice)
dggsgis@alaska.gov

Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays

Why was the data set created?

The objectives of DGGS's resource assessment are to improve the trace-element geochemical coverage of selected watersheds; to obtain modern, quantitative geochemical analyses; to understand the petrogenesis of the granites; and to better document established mineral occurrences. Stream-sediment, pan-concentrate, and rock sampling were conducted as part of the State's Rare Earth Elements and Strategic Minerals Assessment project, which is designed to evaluate Alaska's potential for these resources.

How was the data set created?

From what previous works were the data drawn?
Barker, J.C., 1992 (source 1 of 4)
Barker, J.C., 1992, Investigation of tin-rare earth element placers in the Ray River watershed: Open-File Report OFR 34-91, U.S. Bureau of Mines, United States.
Online Links:
- <http://www.dggs.alaska.gov/pubs/id/21385>
Other_Citation_Details: 63 p., 1 sheet, scale 1:63,360

Type_of_Source_Media: paper

Source_Scale_Denominator: 63360

Source_Contribution: Preliminary research and fieldwork
Barker, J.C. and Foley, J.Y., 1986 (source 2 of 4)
Barker, J.C., and Foley, J.Y., 1986, Tin reconnaissance of the Kanuti and Hodzana Rivers uplands, central Alaska: Information Circular IC 9104, U.S. Bureau of Mines, United States.
Online Links:
- <http://www.dggs.alaska.gov/pubs/id/21287>
Other_Citation_Details: 27 p

Type_of_Source_Media: paper

Source_Contribution: Preliminary research and fieldwork
Foley, J.Y. and McDermott, M.M., 1983 (source 3 of 4)
Foley, J.Y., and McDermott, M.M., 1983, Podiform chromite occurrences in the Caribou Mountain and lower Kanuti River areas, central Alaska, part I: reconnaissance investigations: Information Circular IC 8915, U.S. Bureau of Mines, United States.
Online Links:
- <http://www.dggs.alaska.gov/pubs/id/21279>
Other_Citation_Details: 8 p., 1 sheet

Type_of_Source_Media: paper

Source_Contribution: Preliminary research and fieldwork
Smith, S.M., 1997 (source 4 of 4)
Smith, S.M., 1997, National geochemical database - Reformatted data from the National Uranium Resource Evaluation (NURE) Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) Program: Open-File Report OF 97-492, U.S. Geological Survey, United States.
Online Links:
- <http://www.dggs.alaska.gov/pubs/id/25462>
Type_of_Source_Media: digital data

Source_Contribution: Preliminary research and fieldwork
How were the data generated, processed, and modified?
Date: 2012 (process 1 of 8)
Preliminary research and fieldwork - Mineral-resources personnel from the Alaska Division of Geological & Geophysical Surveys (DGGS) carried out a helicopter-supported geological and geochemical resource assessment project in the Beaver, Bettles, Livengood, and Tanana quadrangles from June 23 through August 5, 2012. This location was targeted based on previously published datasets and reports which documented concentrations of base metals, tin, tungsten, chromium, rare-earth elements (REEs), and uranium in the project area. Fieldwork consisted of stream-sediment, pan-concentrate, and rock sampling.
Data sources used in this process:
- Barker, J.C., 1992
- Barker, J.C. and Foley, J.Y., 1986
- Foley, J.Y. and McDermott, M.M., 1983
- Smith, S.M., 1997
Date: 2012 (process 2 of 8)
Trace-element and rare-earth-element analysis of pan-concentrate samples - Pan-concentrate samples were dried at DGGS using a hot plate and glass petri dishes, which were washed after each use to prevent cross-contamination. Dried samples were weighed to the nearest 0.1 gram and then split manually into two equal-sized, homogeneous portions using a Sepor(TM) micro splitter, which was washed after each use. One split was retained by DGGS for mineralogical studies, the other split was submitted to ALS Minerals (formerly ALS Chemex), and underwent the PREP-31 package, where the sample was logged, dried, weighed, and the entire sample was pulverized to a nominal 85% passing 75 microns (-180 mesh). Samples were analyzed for trace elements and rare earth elements using: Inductively Coupled Plasma - Atomic Emission Spectroscopy (HF-HNO3-HClO4-HCl digestion), Inductively Coupled Plasma - Mass Spectroscopy (Lithium metaborate fusion - HNO3-HCl dissolution), and/or Inductively Coupled Plasma - Atomic Emission Spectroscopy (Fire assay - aqua regia digestion). The method used to analyze each element is listed in the detection limits table. For high-grade and mineralized rare earth samples, high sample to volume ratios are utilized in the Inductively Coupled Plasma - Atomic Emission Spectroscopy analysis to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. See ALS documentation for a more detailed discussion of the methodology.

Date: 2012 (process 3 of 8)
Major- and minor-oxide, trace-element, and rare-earth-element analysis of pulverized rock samples - Igneous and meta-igneous rocks showing little alteration or weathering were collected for major-oxide, minor-oxide, and trace-element analyses to determine bulk rock composition of igneous and meta-igneous lithologies, or to identify the tectonic setting of a sample's protolith from petrogenetically important trace elements. These samples were prepared by ALS Minerals in accordance with their PREP-31 package which involves crushing the entire sample to less than 70 percent passing -10 mesh (2 mm), then splitting off 250 grams and pulverizing the split to better than 85 percent passing 75 microns. Samples were analyzed using: X-Ray Fluorescence (Lithium Borate Fusion), and/or Inductively Coupled Plasma - Mass Spectroscopy (Lithium metaborate fusion - HNO3-HCl dissolution). See ALS documentation for a more detailed discussion of the methodology.

Date: 2012 (process 4 of 8)
Trace-element and rare-earth-element analysis of pulverized rock samples - Rock samples of visibly mineralized rock, or rocks exhibiting features associated with mineralization, were preferentially collected and analyzed for geochemical trace elements and rare earth elements. These samples were prepared by ALS Minerals in accordance with their PREP-31 package which involves crushing the entire sample to less than 70 percent passing -10 mesh (2 mm), then splitting off 250 grams and pulverizing the split to better than 85 percent passing 75 microns. Samples were analyzed for trace elements and rare earth elements using: Inductively Coupled Plasma - Mass Spectroscopy (Lithium metaborate fusion - HNO3-HCl dissolution), X-Ray Fluorescence (Lithium Borate Fusion), Inductively Coupled Plasma - Atomic Emission Spectroscopy (Fire assay - aqua regia digestion), Inductively Coupled Plasma - Atomic Emission Spectroscopy (HF-HNO3-HClO4-HCl digestion), and/or Inductively Coupled Plasma - Atomic Emission Spectroscopy (HNO3-HClO4-HF+HCl digestion). See ALS documentation for a more detailed discussion of the methodology.

Date: 2012 (process 5 of 8)
Major- and minor-oxide and trace-element analysis of rock-slab samples - Fine-grained igneous and meta-igneous rocks showing little alteration or weathering were collected for major-oxide, minor-oxide, and trace-element petrographic analysis using "slab" X-ray fluorescence (slab XRF) in order to determine bulk rock composition of igneous and meta-igneous lithologies, or to identify the tectonic setting of a sample's protolith from petrogenetically important trace elements. See report manuscript for a more detailed discussion of the methodology.

Date: 2012 (process 6 of 8)
Trace-element and rare-earth-element analysis of stream-sediment and soil samples - Stream-sediment sample locations were selected prior to fieldwork to fulfill two different needs: (1) to fill data gaps between previously collected samples with known anomalous values for REE and related elements; and (2) to fill gaps between previously collected samples. Priority was given to samples in closer proximity to the Dalton Highway Trans-Alaska Pipeline System corridor and to samples in drainage basins in or near the mapped extent of granitic plutons. In the field, specific sample locations were selected by visual inspection from the helicopter, and were based on the availability of sample material and a suitable landing zone. Specific sites along streams/rivers at the sample location were then selected, in order of preference from highest to lowest, as follows: gravel/cobble-armored riffles, gravel/cobble-armored point bars, log/boulder/plunge-pool eddies, point bars, overbank flood deposits, and moss mats. Stream-sediment samples were collected with a shovel. Cobbles and larger pebbles were manually screened out by hand, and the remaining material was placed into a permeable cloth sample bag and air dried at camp. To ensure a sufficient volume of fine sediment, 7-inch-wide by 12-inch-long sample bags were filled to capacity. Stream-sediment samples were air dried by DGGS, and then submitted to ALS Minerals (formerly ALS Chemex), and underwent the PREP-41 package, where the sediment were logged, air-dried at low temperature, and weighed. The samples were then sieved to a particle size of -180 microns (-80 mesh). Both fractions were retained, and the -80-mesh fraction was crushed and used for analysis. Some samples lacking sufficient fine material were screened to -35-mesh prior to crushing. Samples were analyzed for trace elements and rare earth elements using: Inductively Coupled Plasma - Mass Spectroscopy (Lithium metaborate fusion - HNO3-HCl dissolution), Inductively Coupled Plasma - Atomic Emission Spectroscopy (Fire assay - aqua regia digestion), and/or Inductively Coupled Plasma - Atomic Emission Spectroscopy (HF-HNO3-HClO4-HCl digestion). See ALS documentation for a more detailed discussion of the methodology.

Date: 2012 (process 7 of 8)
List of visited locations in which samples were not collected for reasons noted - In some cases, targeted sample sites were found to be inaccessible or did not provide suitable sampling media. To facilitate future research in the area, we compiled a list of these sites.

Date: 2019 (process 8 of 8)
Version 1.1 note: Additional XRF-10 lithium borate fusion analytical results were added for samples 12AT021A, 12AT022A, 12AT049, 12AT050, 12BW110, 12BW121, 12CW043, 12CW053, 12CW095, 12LF237A, 12LF238A, 12LF286, 12LF317A.
What similar or related data should the user be aware of?
Adleman, J.N., and Bluemink, Elizabeth, 2013, Second annual Alaska strategic and critical minerals summit: Miscellaneous Publication MP 151, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.
Online Links:
- <http://www.dggs.alaska.gov/pubs/id/25095>
Other_Citation_Details: 17 p
Stevens, D.S.P., Werdon, M.B., and Wright, T.C., 2013, Geochemical trace-element and rare-earth element data from rock samples collected in 2012 on Annette Island, southeast Alaska: Raw Data File RDF 2013-2, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.
Online Links:
- <http://www.dggs.alaska.gov/pubs/id/24975>
Other_Citation_Details: 2 p
Szumigala, D.J., and Werdon, M.B., 2011, Rare-Earth Elements: A brief overview including uses, worldwide resources, and known occurrences in Alaska: Information Circular IC 61, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.
Online Links:
- <http://www.dggs.alaska.gov/pubs/id/22262>
Other_Citation_Details: 12 p
Werdon, M.B., Gallagher, P.E., and Blessington, M.J., 2012, Geochemical, major-oxide, minor-oxide, trace-element, and rare-earth-element data from rock, stream sediment, and pan-concentrate samples collected in 2011 in the William Henry Bay area, Juneau C-4 and D-4 quadrangles, Southeast Alaska: Raw Data File RDF 2012-2, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.
Online Links:
- <http://www.dggs.alaska.gov/pubs/id/23843>
Other_Citation_Details: 2 p

How reliable are the data; what problems remain in the data set?

How well have the observations been checked?
In addition to ALS Minerals' internal quality-control program accredited to ISO/IEC 17025-2005 standards, DGGS monitored analysis quality by inserting igneous-rock and ore-geochemical-pulp standards with known compositions into the sample roster for every sample batch. Some samples were retested for quality control purposes and the results were not included in the publication because the variance of the samples had a mean of 1.25 percent and presented no significant change. We report measured values which are above and/or below instrument detection limits when they are provided to us by the originating lab. These cases are noted within the detection limits tables. Users should contact the originating labs for additional information about detection limits and reporting procedures. For high-grade and mineralized rare earth samples, high sample to volume ratios are utilized in the Inductively Coupled Plasma - Atomic Emission Spectroscopy analysis to improve precision. Certified high grade rare earth reference materials are used as part of the standard protocol. These cases are noted in the detection limits tables.
How accurate are the geographic locations?
Location data were collected using Trimble TSC3 WAAS-enabled GPS devices running ArcPad 10. Data were downloaded directly from the ArcPad .AXF file into a field geodatabase set up in ArcMap. WAAS-enabled GPS devices have a reported error of about 1 meter. Sample points that were placed in the database without GPS have an estimated error ranging from 20 to 170 meters. Latitude and longitude were calculated from the GPS's UTM zone values in ArcMap using the 'calculate geometry' function and are reported using the NAD 27 datum.
How accurate are the heights or depths?
Where are the gaps in the data? What is missing?
All of the samples collected were analyzed by methods appropriate to the sample media. This publication also includes location coordinates of potential sample sites in which samples were not collected for reasons noted.
How consistent are the relationships among the observations, including topology?
not applicable

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:
This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).

Use_Constraints:
Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.

Who distributes the data set? (Distributor 1 of 1)

Alaska Division of Geological & Geophysical Surveys
3354 College Road
Fairbanks, AK 99709-3707
USA

(907)451-5020 (voice)
(907)451-5050 (FAX)
dggspubs@alaska.gov

Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays

Contact_Instructions:
Please view our website (<http://www.dggs.alaska.gov>) for the latest information on available data. Please contact us using the e-mail address provided above when possible.
What's the catalog number I need to order this data set?
RDF 2013-5
What legal disclaimers am I supposed to read?

The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.
How can I download or order the data?
- Availability in non-digital form:
  DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount.
- Cost to order the data: Contact DGGS for current pricing
- Availability in digital form:
  
  Data format: ASCII tabular files
  
  Network links: <http://www.dggs.alaska.gov/pubs/id/25386>
- Cost to order the data: Free download

Who wrote the metadata?

Dates:

Last modified: 12-Sep-2013

Metadata author:

Simone Montayne
3354 College Road
Fairbanks, AK 99709-3707
USA

(907)451-5020 (voice)

Metadata standard:

FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

Metadata extensions used:

<http://www.dggs.alaska.gov/metadata/dggs.ext>

Generated by mp version 2.9.21 on Fri Mar 8 14:35:10 2019

Data format:	ASCII tabular files
Network links:	<http://www.dggs.alaska.gov/pubs/id/25386>