Analyses of historic U.S. Bureau of Mines rock and heavy mineral concentrate samples for geochemical trace-element and rare-earth element data--Ray Mountains and Kanuti-Hodzana uplands area, Alaska

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Title:
Analyses of historic U.S. Bureau of Mines rock and heavy mineral concentrate samples for geochemical trace-element and rare-earth element data--Ray Mountains and Kanuti-Hodzana uplands area, Alaska
Abstract:
Re-analyses of sample pulps and bulk rejects from historic USBM rock and heavy-mineral-concentrate samples were conducted by the Alaska Division of Geological & Geophysical Surveys (DGGS) as part of the State of Alaska's Strategic and Critical Minerals Assessment project, which is designed to evaluate Alaska's potential for these resources. The objective of this resource assessment is to expand the state's geochemical database by obtaining and publishing modern, quantitative geochemical analyses for historic USBM samples, where available. Highlights of this re-analysis project include heavy mineral concentrates with up 7,220 ppm Sn, 5,870 ppm Cr, and 17,000 ppm Mn.
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. 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: >rock-pan-con-trace-element-ree: Trace-element and rare-earth-element analysis of sample pulps and bulk rejects from historic USBM rock and heavy-mineral-concentrate samples
  1. How should this data set be cited?

    Blessington, M.J., Reioux, D.A., and Werdon, M.B., 2013, Analyses of historic U.S. Bureau of Mines rock and heavy mineral concentrate samples for geochemical trace-element and rare-earth element data--Ray Mountains and Kanuti-Hodzana uplands area, Alaska: Raw Data File RDF 2013-7, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 3 p.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -151.3191
    East_Bounding_Coordinate: -150.0384
    North_Bounding_Coordinate: 66.2836
    South_Bounding_Coordinate: 65.9581

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: 2012
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: ASCII tabular files, report

  6. 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.

  7. How does the data set describe geographic features?

    rdf2013-7-rock-pan-con-trace-element-ree.csv , rdf2013-7-rock-pan-con-trace-element-ree-limits.csv
    Trace-element and rare-earth-element analysis of sample pulps and bulk rejects from historic USBM rock and heavy-mineral-concentrate samples. (Source: Alaska Division of Geological & Geophysical Surveys)

    Sample_ID
    Label assigned by USBM scientists to identify the sample. (Source: Alaska Division of Geological & Geophysical Surveys)

    Samples numbers with a KA prefix were collected from upland drainages along the Trans-Alaska Pipeline System (TAPS). Samples with an RM prefix were collected from either the Ray River or on upper No Name Creek.

    USBM_Reference
    Reference to the originating USBM dataset.. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    Stablein, 1980Stablein, N.K., 1980, Report on the mineral resource investigations of six areas of central and northeastern Alaska, Contract No. GJ8X-33(80): U.S. Bureau of Mines Contract Report, 188 p., 10 sheets, scale 1:250,000.
    Barker, 1983Barker, J.C., 1983, Reconnaissance of tin and tungsten in heavy mineral panned concentrates along the Trans-Alaska Pipeline Corridor, north of Livengood, interior Alaska: U.S. Bureau of Mines Open File Report 59-83, 24 p., 2 sheets, scale 1:250,000.
    Barker, 1991Barker, J.C., 1991, Investigation of tin-rare earth element placers in the Ray River watershed: U.S. Bureau of Mines Open-File Report 34-91, 63 p., 1 sheet, scale 1:63,360.

    USBM_Materials
    Sample media of the original USBM sample. (Source: United States Bureau of Mines staff)

    ValueDefinition
    rockThe sample pulp was a bulk reject split from a previously analyzed USBM rock sample. USBM rock samples were collected from float or rock chips at mineralized localities and were subsequently crushed, pulverized and split prior to analysis.
    pan concentrateThe sample was a bulk reject split from a previously analyzed USBM pan concentrate sample. The USBM samples were concentrated by screening through a 0.5-inch and a 16-mesh screen, respectively, followed by either hand panning or tabling the undersize portion.

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

    Range of values
    Minimum:65.9581
    Maximum:66.2836
    Units:decimal degrees

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

    Range of values
    Minimum:-151.3191
    Maximum:-150.0384
    Units:decimal degrees

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

    Range of values
    Minimum:0.04
    Maximum:0.09
    Units:kilograms

    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.)

    Range of values
    Minimum:3.9
    Maximum:540
    Units:parts per million

    Ce_ppm
    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.)

    Range of values
    Minimum:1.3
    Maximum:5960
    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.)

    Range of values
    Minimum:80
    Maximum:5870
    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.)

    Range of values
    Minimum:0.07
    Maximum:61.4
    Units:parts per million

    Dy_ppm
    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.)

    Range of values
    Minimum:0.23
    Maximum:294
    Units:parts per million

    Er_ppm
    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.)

    Range of values
    Minimum:0.13
    Maximum:194.5
    Units:parts per million

    Eu_ppm
    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.)

    Range of values
    Minimum:0.09
    Maximum:9.05
    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:2
    Maximum:87.6
    Units:parts per million

    Gd_ppm
    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.)

    Range of values
    Minimum:0.34
    Maximum:290
    Units:parts per million

    Hf_ppm
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.2
    Maximum:282
    Units:parts per million

    Ho_ppm
    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.)

    Range of values
    Minimum:0.05
    Maximum:62.8
    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.)

    Range of values
    Minimum:0.7
    Maximum:2910
    Units:parts per million

    Lu_ppm
    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.)

    Range of values
    Minimum:0.01
    Maximum:27.8
    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 ALS Chemex.)

    Range of values
    Minimum:0.6
    Maximum:627
    Units:parts per million

    Nd_ppm
    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.)

    Range of values
    Minimum:0.9
    Maximum:2080
    Units:parts per million

    Pr_ppm
    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.)

    Range of values
    Minimum:0.2
    Maximum:658
    Units:parts per million

    Rb_ppm
    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.)

    Range of values
    Minimum:0.8
    Maximum:938
    Units:parts per million

    Sm_ppm
    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.)

    Range of values
    Minimum:0.32
    Maximum:404
    Units:parts per million

    Sn_ppm
    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.)

    ValueDefinition
    -2Above detection limit.

    Range of values
    Minimum:1
    Maximum:7220
    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.)

    Range of values
    Minimum:5
    Maximum:472
    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 ALS Chemex.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.1
    Maximum:123
    Units:parts per million

    Tb_ppm
    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.)

    Range of values
    Minimum:0.05
    Maximum:44.6
    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.)

    ValueDefinition
    -2Above detection limit.

    Range of values
    Minimum:0.14
    Maximum:843
    Units:parts per million

    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.5
    Maximum:4
    Units:parts per million

    Tm_ppm
    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.)

    Range of values
    Minimum:0.02
    Maximum:29.4
    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.)

    Range of values
    Minimum:0.15
    Maximum:169
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:5
    Maximum:284
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:1
    Maximum:878
    Units:parts per million

    Y_ppm
    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.)

    Range of values
    Minimum:1.6
    Maximum:1990
    Units:parts per million

    Yb_ppm
    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.)

    Range of values
    Minimum:0.09
    Maximum:178.5
    Units:parts per million

    Zr_ppm
    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.)

    ValueDefinition
    -1Below detection limit.
    -2Above detection limit.

    Range of values
    Minimum:20
    Maximum:7760
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.7
    Maximum:1.7
    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.)

    Range of values
    Minimum:0.57
    Maximum:9.65
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:5
    Maximum:89
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:10
    Maximum:560
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.5
    Maximum:66.2
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:2
    Maximum:103
    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.)

    Range of values
    Minimum:0.01
    Maximum:12.7
    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 ALS Chemex.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.5
    Maximum:5
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:1
    Maximum:134
    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.)

    Range of values
    Minimum:59
    Maximum:4920
    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.)

    Range of values
    Minimum:1
    Maximum:70
    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.)

    Range of values
    Minimum:0.92
    Maximum:13.4
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:10
    Maximum:50
    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.)

    Range of values
    Minimum:0.01
    Maximum:3.75
    Units:percent

    La_ppm_2
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:10
    Maximum:2220
    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.)

    Range of values
    Minimum:0.06
    Maximum:23
    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.)

    Range of values
    Minimum:173
    Maximum:17000
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:1
    Maximum:6
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.07
    Maximum:2.16
    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.)

    Range of values
    Minimum:1
    Maximum:1360
    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.)

    Range of values
    Minimum:30
    Maximum:4570
    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.)

    Range of values
    Minimum:3
    Maximum:74
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.01
    Maximum:0.07
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:5
    Maximum:10
    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.)

    Range of values
    Minimum:2
    Maximum:71
    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.)

    Range of values
    Minimum:6
    Maximum:557
    Units:parts per million

    Th_ppm_2
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:20
    Maximum:1280
    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.)

    Range of values
    Minimum:0.02
    Maximum:6.36
    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.)

    ValueDefinition
    -1Below detection limit.

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

    U_ppm_2
    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.)

    ValueDefinition
    -1Below detection limit.

    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.)

    Range of values
    Minimum:4
    Maximum:239
    Units:parts per million

    W_ppm_2
    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.)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:10
    Maximum:640
    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.)

    Range of values
    Minimum:19
    Maximum:786
    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.)

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

    Range of values
    Minimum:0.001
    Maximum:0.009
    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 = 0.001 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.)

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

    Range of values
    Minimum:0.006
    Maximum:0.008
    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.)

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

    Range of values
    Minimum:0.005
    Maximum:0.035
    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.)

    ValueDefinition
    NULLBlank (NULL) field values indicate that this chemical species was not requested or not analyzed.

    Range of values
    Minimum:1.64
    Maximum:3.37
    Units:percent

    Th_pct
    Thorium 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.)

    ValueDefinition
    NULLBlank (NULL) field values indicate that this chemical species was not requested or not analyzed.

    Range of values
    Minimum:0.13
    Maximum:0.18
    Units:percent

    Zr_pct
    Zirconium 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.)

    ValueDefinition
    NULLBlank (NULL) field values indicate that this chemical species was not requested or not analyzed.

    Range of values
    Minimum:0.8
    Maximum:1.23
    Units:percent


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. 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.

  3. 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. This work was 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?

  1. From what previous works were the data drawn?

    Barker, J.C., 1983 (source 1 of 6)
    Barker, J.C., 1983, Reconnaissance of tin and tungsten in heavy mineral panned concentrates along the Trans-Alaska Pipeline corridor, north of Livengood, interior Alaska: Open-File Report OFR 59-83, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 24 p., 2 sheets, scale 1:250,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution: Preliminary research and sample retrieval

    Barker, J.C., 1991 (source 2 of 6)
    Barker, J.C., 1991, 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:

    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 sample retrieval

    Barker, J.C. and Foley, J.Y., 1986 (source 3 of 6)
    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:

    Other_Citation_Details: 27 p
    Type_of_Source_Media: paper
    Source_Contribution: Preliminary research and sample retrieval

    Foley, J.Y. and McDermott, M.M., 1983 (source 4 of 6)
    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:

    Other_Citation_Details: 8 p., 1 sheet
    Type_of_Source_Media: paper
    Source_Contribution: Preliminary research and sample retrieval

    Smith, S.M., 2006 (source 5 of 6)
    Smith, S.M., 2006, 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 v. 1.40, U.S. Geological Survey, United States.

    Online Links:

    Type_of_Source_Media: digital data
    Source_Contribution: Preliminary research and sample retrieval

    Stablein, N.K., 1980 (source 6 of 6)
    Stablein, N.K., 1980, Report on the mineral resource investigations of six areas of central and northeastern Alaska, Contract No. GJ8X-33(80): Contract Report Stablein, N.K., 1980, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 188 p., 10 sheets, scale 1:250,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution: Preliminary research and sample retrieval

  2. How were the data generated, processed, and modified?

    Date: 2011 (process 1 of 2)
    Preliminary research and sample retrieval - DGGS staff selected sample pulps and bulk rejects of historic USBM rock and heavy-mineral-concentrate samples that were archived at the Alaska Geologic Materials Center. These samples had been previously analyzed by USBM for resource evaluation projects in the Ray Mountains and Kanuti-Hodzana uplands study area. Location data for each sample were derived by scanning the station-location map figures from historic USBM reports, georegistering the map figures in ArcGIS v. 10.0, creating a point layer of station locations, and extracting latitude-longitude coordinates. The accompanying manuscript provides a brief summary of USBM sampling methods; however, users should review the originating reports for verification and additional details.

    Data sources used in this process:

    • Barker, J.C., 1983
    • Barker, J.C., 1991
    • Barker, J.C. and Foley, J.Y., 1986
    • Foley, J.Y. and McDermott, M.M., 1983
    • Smith, S.M., 2006
    • Stablein, N.K., 1980

    Date: 2012 (process 2 of 2)
    Trace-element and rare-earth-element analysis of sample pulps and bulk rejects from historic USBM rock and heavy-mineral-concentrate samples - All samples were analyzed for ore-related trace elements and the full suite of rare-earth elements. Selected samples were also analyzed for platinum, palladium, and gold. Trace-element compositions were determined using inductively coupled plasma atomic emission spectroscopy (ICP-AES) following a four-acid digestion process. Rare-earth and additional trace-element compositions were determined using inductively coupled plasma mass spectroscopy (ICP-MS). ICP-MS samples were dissolved in acid following lithium metaborate fusion. Platinum, palladium, and gold values were obtained from a 30 g sample using inductively coupled plasma atomic emission spectroscopy (ICP-AES) following aqua-regia digestion-fire assay. Some samples were retested for quality control purposes; the results were not included in the publication because the percent variance of the samples had a mean of 1.25 percent, and presented no significant change. Several samples with elements (Sn, Th, Zr) above the detection limits in the analytical methods described above were re-analyzed using X-ray fluorescence following lithium borate fusion.

  3. 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:

    Other_Citation_Details: 17 p
    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:

    Other_Citation_Details: 4 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:

    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:

    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:

    Other_Citation_Details: 2 p


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

  1. 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.

  2. How accurate are the geographic locations?

    Location data for each sample were derived by scanning the station-location map figures from historic USBM reports, georegistering the map figures in ArcGIS v. 10.0, creating a point layer of station locations, and extracting latitude-longitude coordinates. Former USBM staff provided us with a location coordinate accuracy estimate of 50 meters with likely better accuracy in stream-beds and areas of high relief.

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    All samples were analysed for rare-earth and additional trace-element compositions. Selected samples were also analysed for platinum, palladium, and gold. Samples with elements (Sn, Th, Zr) above the detection limits in the analytical methods described above were re-analyzed using X-ray fluorescence following lithium borate fusion.

  5. 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.

  1. 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.
  2. What's the catalog number I need to order this data set?

    RDF 2013-7

  3. 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.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 17-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:


Generated by mp version 2.9.21 on Tue Sep 17 15:48:57 2013