Werdon, M.B. Gallagher, P.E. Blessington, M.J. 2012 report,digital data Raw Data File RDF 2012-2 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 2 p. http://dx.doi.org/10.14509/23843 Mineral-resources personnel from the Alaska Division of Geological & Geophysical Surveys conducted reconnaissance sampling of the William Henry Bay area in the Juneau C-4 and D-4 quadrangles, August 9-13, 2011. This sampling project was part of a statewide assessment of Alaska's potential for rare-earth element mineralization. During the William Henry Bay field project 46 rock, sediment, and heavy-mineral concentrate samples were collected for geochemical analysis (geochemical, major oxide, minor oxide, trace element, and rare earth elements). Fieldwork was performed to evaluate the mineral-resource potential of a block of State land near the mouth of William Henry Creek, and to investigate reported rare-earth-element, uranium, and thorium mineral occurrences on adjacent Tongass National Forest land. This fieldwork and sampling was conducted as part of the State's Rare Earth Element and Strategic Minerals Assessment project, which is designed to evaluate Alaska's potential for these resources. 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 and correspond to subdirectories within the data distribution package. The metadata layer provides an FGDC metadata file and may include other documentation files. Attribute information for each data layer is described in this metadata file under the "Entity_and_Attribute_Information" section. Data layer contents: >border: Outline of the study area. >geochemical-data: Major- and minor-oxide, trace-element, and rare-earth-element analysis of pulverized rock, pan concentrate, and stream sediment samples 2011 2014 ground condition complete None planned -135.288500 -135.231200 58.762100 58.717200 ISO 19115 Topic Category geoscientificInformation Alaska Division of Geological & Geophysical Surveys Critical Minerals Geochemistry Gold Major Oxides Minor Oxides Rare Earth Elements Strategic Minerals Strategic and Critical Minerals Assessment Project Trace Elements Alaska Division of Geological & Geophysical Surveys Alaska, State of Endicott River Juneau Mining District Juneau Quadrangle Lance Point Lynn Canal William Henry Bay William Henry Creek 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). 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. Alaska Division of Geological & Geophysical Surveys GIS Manager mailing and physical

3354 College Road

Fairbanks AK 99709-3707 USA (907)451-5020 dggsgis@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays This project is part of the State's Rare Earth Elements and Strategic Minerals Assessment CIP funded by the Alaska State Legislature and managed by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. All geochemical, major-oxide, minor-oxide, trace-element, and rare-earth-element analyses were conducted by Actlabs. Analytical methods and detection limits are listed in attribute definitions. In addition to the internal quality-control program at Actlabs, DGGS monitored analysis quality by inserting igneous-rock and REE standards of known composition into the sample roster for every sample batch. not applicable This dataset contains all of the analysis for major-oxide, minor-oxide, trace-element, and rare-earth-element geochemistry complete at the time of publication for all samples collected in the William Henry Bay area during August 2011. Location data were downloaded from Garmin eTrex Legend HCx GPS units into a Microsoft 2007 Access database. Sample points were plotted into ArcGIS and visually examined to verify accuracy. Sample collection - Rock, stream sediment, and heavy-mineral pan-concentrate samples were collected from outcrops, float fields, and stream beds in the William Henry Bay area. Rock samples were chosen and collected on the basis of potential for mineralization (as identified by visual inspection). Igneous rocks as well as rocks that exhibited veining or alteration were preferentially chosen for geochemical examination. Heavy mineral concentrates were isolated by hand-panning in the field. 2011 Sample preparation - All sample preparation for analysis was performed by Actlabs. Rocks intended for whole-rock analysis by Actlabs and those with a weathering rind were trimmed at DGGS with a tile saw prior to sample preparation at the laboratory. Rock samples were crushed to minus-10 mesh (1.7mm), mechanically split by riffling, and then pulverized to 95% minus-150 mesh (105 microns). A mild steel mill was used for pulverizing to minimize contamination of samples. Stream sediment and pan concentrate samples were dried at a temperature of 60C and then sieved to minus 80 mesh (177 microns). For Code-8 REE analysis, both rock and sediment samples were further pulverized to minus-200 mesh (0.074mm) using a mild-steel mill. Cleaning sand was used after every sample preparation to prevent contamination. 2011 Sample analysis - All samples were analyzed for major oxides, minor oxides and petrologic trace elements, as well as ore-related trace elements and rare earth elements. In addition to the internal quality-control program at Actlabs, DGGS monitored analysis quality by inserting igneous-rock and REE standards of known composition into the sample roster for every sample batch. The major oxide, minor oxide, petrographic trace-element, and ore-related trace-element analyses were conducted using inductively-coupled plasma - optical emission spectrometry (ICP - OES) and inductively-coupled plasma mass spectrometry (ICP-MS) following lithium metaborate/tetraborate fusion. Mass balance was used for the major-oxide and minor-oxide analyses as an additional quality control technique, requiring elemental totals of oxides to be between 98 and 101 percent. Gold assays were performed using gravimetric analysis following fire assay (FA-GRAV) on 29.16 grams of material. Separate splits of 4 samples were reanalyzed for gold using Instrumental Neutron Activation Analysis following fire assay (FA-INAA); grams of material analyzed is noted in the .csv file. 2011 Documentation revisions - We identified and corrected typographical errors in the description fields and in the file metadata. Data table headers were slightly modified to provide consistency with similar geochemical data releases. 2014 point 0.000001 0.000001 decimal degrees North American Datum of 1927 Clarke 1866 6378206.4 294.9786982 rdf2012-2-border.shp Outline of the study area. Alaska Division of Geological & Geophysical Surveys border rdf2012-2-geochemical-data.csv, rdf2012-2-geochemical-data-limits.csv Major- and minor-oxide, trace-element, and rare-earth-element analysis of pulverized rock, pan concentrate, and stream sediment samples. Alaska Division of Geological & Geophysical Surveys geochemical-data SAMPLE Label assigned to identify the sample. Alaska Division of Geological & Geophysical Surveys Generic example of a sample identifier: YYAAA9999X: 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. All samples were collected by M.B. Werdon. LONGITUDE Longitude, NAD27 Alaska Division of Geological & Geophysical Surveys -135.2885 -135.2312 decimal degrees LATITUDE Latitude, NAD27 Alaska Division of Geological & Geophysical Surveys 58.7172 58.7621 decimal degrees WEIGHT_KG Sample weight (as received by the lab) in kilograms Alaska Division of Geological & Geophysical Surveys and Actlabs 0.00849 0.0125 kilograms NULL received sample weight was not provided by the lab Alaska Division of Geological & Geophysical Surveys BATCH_NUMBER Number provided by the laboratory to identify the samples and analyses included in the work order. Actlabs The batch numbers assigned by the lab for these results are: A11-10924 and A12-01101 NULL received sample weight was not provided by the lab Alaska Division of Geological & Geophysical Surveys DESCRIPTION Description of the sample Alaska Division of Geological & Geophysical Surveys Characters 1 to 254 of a brief sample or station description. NULL received sample weight was not provided by the lab Alaska Division of Geological & Geophysical Surveys DESCRIP_2 Extension of the sample or station description for descriptions which are greater than 254 characters in length Alaska Division of Geological & Geophysical Surveys Characters greater than 254 of the sample or station description. NULL The descriptive text is shorter than 254 characters. Alaska Division of Geological & Geophysical Surveys DESCRIP_3 Extension of the sample or station description for descriptions which are greater than 508 characters in length Alaska Division of Geological & Geophysical Surveys Characters greater than 508 of the sample or station description. NULL The descriptive text is shorter than 508 characters. Alaska Division of Geological & Geophysical Surveys DESCRIP_4 Extension of the sample or station description for descriptions which are greater than 762 characters in length Alaska Division of Geological & Geophysical Surveys Characters greater than 762 of the sample or station description. NULL The descriptive text is shorter than 762 characters. Alaska Division of Geological & Geophysical Surveys SAMPLE_MATERIAL Type of material that was sent to the lab for processing. Alaska Division of Geological & Geophysical Surveys The sample materials included in this analysis are: rock, pan concentrate, and stream sediment SiO2_pct Silicon dioxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 11.65 91.19 percent TiO2_pct Titanium dioxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.001 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 0.007 2.595 percent Al2O3_pct Aluminum oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 1.49 23.33 percent Fe2O3_pct Iron oxide (+3) values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 0.68 15.99 percent MnO_pct Manganese oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.001 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 0.035 0.362 percent MgO_pct Magnesium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 0.11 10.32 percent CaO_pct Calcium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 0.2 40.33 percent Na2O_pct Sodium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 0.03 6.72 percent K2O_pct Potassium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 0.03 10.61 percent P2O5_pct Phosphorus oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 0.01 1.36 percent LOI_pct Loss on Ignition values measured in percent (pct); Method: Gravimetric (GRAV); Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 0.79 36.52 percent Total_pct Total values measured in percent (pct); Method: Calculation (Calculation); Lower detection limit = pct; Upper detection limit = 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 uncertainties in the measurements or calculation assumptions. Actlabs 88.27 100.9 percent Au_g_tonne Gold values measured in grams per ton (gm/t); Method: Fire Assay - Gravimetric (FA-GRAV); Lower detection limit = 0.03 gm/t; Upper detection limit = gm/t; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs NULL Blank (NULL) field values indicate that this chemical species was not requested or not analyzed. Alaska Division of Geological & Geophysical Surveys 0.03 1.97 grams per ton Au_ppb Gold values measured in parts per billion (ppb); Method: Fire Assay - Instrumental Neutron Activation Analysis (FA-INAA); Lower detection limit = 1 ppb; Upper detection limit = ppb; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs NULL Blank (NULL) field values indicate that this chemical species was not requested or not analyzed. Alaska Division of Geological & Geophysical Surveys Ag_ppm Silver values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.5 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.6 3.8 parts per million As_ppm Arsenic values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 5 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 6 26 parts per million Ba_ppm Barium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 3 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 17 83430 parts per million Be_ppm Beryllium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 1 5 parts per million Bi_ppm Bismuth values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.4 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.4 5.1 parts per million Co_ppm Cobalt values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 1 43 parts per million Cr_ppm Chromium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 20 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 20 350 parts per million Cs_ppm Cesium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.5 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.5 2.9 parts per million Cu_ppm Copper values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 10 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 10 170 parts per million Ga_ppm Gallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 1 35 parts per million Hf_ppm Hafnium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.2 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.3 8.6 parts per million In_ppm Indium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.2 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs Mo_ppm Molybdenum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 2 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 2 11 parts per million Nb_ppm Niobium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 1 59 parts per million Ni_ppm Nickel values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 20 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 20 90 parts per million Ge_ppm Germanium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 1 3 parts per million Pb_ppm Lead values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 5 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 5 279 parts per million Rb_ppm Rubidium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 2 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 3 182 parts per million Sb_ppm Antimony values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.5 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.9 6.5 parts per million Sc_ppm Scandium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 1 45 parts per million Sn_ppm Tin values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 1 2 parts per million Sr_ppm Strontium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 2 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 58 2583 parts per million Ta_ppm Tantalum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.1 3.2 parts per million Th_ppm Thorium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 0.1 47.5 parts per million Tl_ppm Thallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.1 2.3 parts per million U_ppm Uranium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.1 14.8 parts per million V_ppm Vanadium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 5 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 13 410 parts per million W_ppm Tungsten values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 1 4 parts per million Y_ppm Yttrium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 2 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 4 37 parts per million Zn_ppm Zinc values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 30 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 40 350 parts per million Zr_ppm Zirconium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 4 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 11 547 parts per million La_ppm Lanthanum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 0.4 187 parts per million Ce_ppm Cerium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 0.7 318 parts per million Pr_ppm Praseodymium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.05 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 0.07 29.4 parts per million Nd_ppm Neodymium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs 0.3 86.3 parts per million Sm_ppm Samarium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.1 14.8 parts per million Eu_ppm Europium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.05 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.1 3.95 parts per million Gd_ppm Gadolinium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.6 10.1 parts per million Tb_ppm Terbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.1 1.4 parts per million Dy_ppm Dysprosium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.1 7.3 parts per million Ho_ppm Holmium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.1 1.4 parts per million Er_ppm Erbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.1 3.9 parts per million Tm_ppm Thulium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.05 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.05 0.64 parts per million Yb_ppm Ytterbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.2 4.5 parts per million Lu_ppm Lutetium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.04 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Actlabs -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and Actlabs 0.05 0.77 parts per million Alaska Division of Geological & Geophysical Surveys mailing and physical

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