Naibert, T.J. Werdon, M.B. Lande, Lauren Wypych, Alicja 2016 report and digital data Raw Data File RDF 2016-10 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 3 p. http://dx.doi.org/10.14509/29688 In 2016, geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) and University of Alaska Fairbanks carried out a two-part geologic mapping and geochemical sampling project in the Tok River area of the Tanacross A-5 and A-6 quadrangles (June 12-26 and July 8-26). This report provides results of stream-sediment sampling for trace-element geochemistry. An initial suite of sediment samples was collected from streams draining known gold occurrences, including the Stibnite Creek and Noah prospects, and numerous prospects in the White Gold area. These samples were split in half and the two splits were sieved to -200 mesh and -80 mesh, respectively. The splits were then both analyzed to determine which size fraction was best for identifying gold anomalies in this part of the Alaska Range. In most samples, the -200 mesh fraction showed higher gold levels, and hence, all additional samples we collected were analyzed at -200 mesh. In some -80 mesh samples, gold and tungsten appear to show "nugget" effects not seen in the -200 mesh samples. The other trace elements are largely equivalent between the two mesh sizes. The second suite of samples was collected throughout the map area from streams draining color anomalies, from areas where DGGS mapping identified igneous rocks upstream, and from areas with suspected potential for base-metal or gold mineralization. Highlights of the analytical results include two samples draining the Noah prospect with greater than 1 part per million gold. The analytical data tables associated with this report are available in digital format as comma-separated value (CSV) files. The combination of insufficient detailed geologic mapping, historical and current industry interest in the adjacent mineralized areas, and the recently published geophysical data prompted the DGGS Mineral Resources section to conduct a stream-sediment sampling program in conjunction with geologic mapping in the Tok River area. >border: Outline of the study area >stream-sed-trace-element: Trace-element analysis of stream-sediment samples 2016 ground condition complete None planned -144.019833 -143.096187 63.245385 63.027626 ISO 19115 Topic Category geoscientificInformation Alaska Division of Geological & Geophysical Surveys Analyses Analyses and Sampling Analytical Lab Results Analytical Results Chemistry Economic Geology Exploration Geochemical Data Geochemical Surveys Geochemistry Geology Gold Heavy Metals Lab Methods Metals Mineral Assessment Mineral Deposit Mineral Localities Mineral Prospect Mineral Resources Placer Placer Gold Precious Metals STATEMAP Project Stream Sediments Trace Elements Trace Geochemical Trace Metals Alaska Division of Geological & Geophysical Surveys Dall Prospect Eagle Prospect Jacqueline Prospect Shalosky Prospect Tanacross Quadrangle Tok Tok Mining District Tok River Alaska Division of Geological & Geophysical Surveys Delta Mineral Belt 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 Rd

Fairbanks AK 99709-3707 USA 907-451-5020 dggsgis@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays The DGGS Tok River project is funded through U.S. Geological Survey STATEMAP Award No. G16AC00182; Cooperative Agreement Number G16AC00167 between the U.S. Geological Survey and the Alaska Department of Natural Resources, Division of Geological & Geophysical Surveys; and by State of Alaska general funds. Emond, A.M. CGG Burns, L.E. Graham, G.R.C. CGG Land (US) Inc. 2015 Geophysical Report GPR 2015-2 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys http://doi.org/10.14509/29347 Twelker, Evan Freeman, L.K. Sicard, K.R. Busk, A.C. 2016 Preliminary Interpretive Report PIR 2016-2 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 7 p http://doi.org/10.14509/29605 Wypych, Alicja Sicard, K.R. Twelker, Evan Freeman, L.K. Lande, Lauren Reioux, D.A. 2015 Raw Data File RDF 2015-15 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 3 p http://doi.org/10.14509/29517 Wypych, Alicja Sicard, K.R. Gillis, R.J. Lande, L.L. Naibert, T.J. Newberry, R.J. Twelker, Evan Werdon, M.B. Willingham, A.L. 2016 Raw Data File RDF 2016-9 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 3 p http://doi.org/10.14509/29685 Coordinates of sample locations were determined by the geologists in the field using using hand-held GPS devices. Sample numbers were recorded in the field on sample bags and on field note sheets. The sample location tables were plotted in GIS software to visually verify location accuracy and cross checked for consistency against the sample numbers recorded on the bags. Samples were analyzed for a variety of major and trace elements by ALS Geochemistry using the methods listed below. In addition to ALS Geochemistry's accredited (ISO/IEC 17025-2005) internal quality-control program, DGGS monitored analysis quality with two standard reference materials, a gold standard and a base-metal standard. One of each standard was inserted into each batch of 20 samples submitted to ALS Geochemistry. Lab results were examined by the DGGS geologists to ensure that they are reasonable given the geologic context of the sample. Inconsistencies between the field data and the lab sample numbers listed on the COA (certificate of assay) are noted in the data tables. not applicable This data release is complete. The data tables have been lightly edited for clarity, but are generally provided as received from the lab. Locations were recorded using handheld, WAAS-enabled GPS devices. WAAS-enabled GPS devices have a reported error of about 1 m (NSTB/WAAS T&E Team, 2006). Depending on degradation of the WAAS and GPS signals, the horizontal position error of sample locations in this report is in the range of 1-10 m. Dashevsky, S.S. Schaefer, C.F. Hunter, E.N. 2003 Professional Report PR 122 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 122 p., 2 sheets, scale 1:63,360 http://doi.org/10.14509/2923 63360 paper 2003 publication date Dashevsky, S.S. and others, 2003 sample selection Foster, H.L. 1970 Miscellaneous Geologic Investigations Map I 593 United States U.S. Geological Survey 1 sheet, scale 1:250,000 http://dggs.alaska.gov/pubs/id/12871 250000 paper 1970 publication date Foster, H.L., 1970 sample selection Nokleberg, W.J. Aleinikoff, J.N. Bond, G.C. Ferrians, O.J., Jr. Herzon, P.L. Lange, I.M. Miyaoka, R.T. Richter, D.H. Schwab, C.E. Silva, S.R. Smith, T.E. Zehner, R.E. 2015 Report of Investigation RI 2015-6 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 64 p., 45 sheets, scale 1:63,360 http://doi.org/10.14509/29444 63360 paper 2015 publication date Nokleberg, W.J. and others, 2015 sample selection Sample selection - Stream-sediment sample locations were selected to characterize drainage basins containing igneous intrusions or locations of known or potential mineralization. In the field, sample locations were selected that were upstream of alluvial fans and as close to stream confluences as possible, while also accounting for availability of sample material and proximity to helicopter landing zones. Specific sites at the sample location were selected based on the presence of fine-grained sand and silt, and included eddies or plunge-pools behind boulders or logs, eddies along edges of streams, overbank deposits, and channel bars. Samples were collected with a shovel, screened by hand using a Garrett's Combination Sifter with a 0.483-inch square-hole mesh, and then further screened using a 0.0742-inch square-hole mesh (-10 mesh). Undersized material was collected in a 3-gallon plastic bucket and then all materials, fines, and water were poured into polypropylene sample bags (10 inch x 17 inch) specifically designed to capture fines and allow water drainage. Where possible, the sample bags were filled to capacity to provide enough sample material to split and sieve using both -80 mesh and -200 mesh screens. For the remaining samples, sample bags were filled to approximately 60 percent of capacity. Individual sample weights were measured after drying and are provided in the analytical results. Dashevsky, S.S. and others, 2003 Foster, H.L., 1970 Nokleberg, W.J. and others, 2015 2016 Sample preparation - Sediment samples were processed by ALS Minerals using their PREP-41 package. The samples were logged and dried at a maximum temperature of 60 degrees Celsius. An initial batch of 23 samples were each split with a riffle splitter, and sample splits were dry-sieved to less than 180 microns (-80 mesh) and to less than 75 microns (-200 mesh), respectively. The remaining 44 samples were dry-sieved to less than 75 microns (-200 mesh). 2016 Major- and trace-element compositions - Trace-element compositions for sediment samples were determined by ALS Geochemistry method ME-MS61: Four-acid digestion followed by inductively coupled plasma-atomic emission spectrometry (ICP-AES) and inductively coupled plasma-mass spectroscopy (ICP-MS). Platinum, palladium, and gold values were analyzed by 30 g fire assay with ICP-MS finish (ALS Geochemistry method PGM-MS23). Samples that exceeded detection limits for gold were reanalyzed by 30 g fire assay with atomic absorption (AA) finish (ALS Geochemistry method Au-AA25). 2016 Sample archival - Samples collected during this project, as well as laboratory sample rejects and pulps, will be stored at DGGS for the duration of the project and will be available for public viewing upon request. Once the project concludes, the samples and pulps will be stored at the Alaska Geologic Materials Center in Anchorage. 2016 point 0.00001 0.00001 decimal degrees World Geodetic System of 1984 WGS 84 6378137 298.257223563 rdf2016-10-border.shp Outline of the study area Alaska Division of Geological & Geophysical Surveys border rdf2016-10-stream-sed-trace-element.csv, rdf2016-10-stream-sed-trace-element-methods.csv Trace-element analysis of stream-sediment samples. Alaska Division of Geological & Geophysical Surveys stream-sed-trace-element 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. LAB_SAMPLE_NUMBER Label used by the lab to identify the sample. Alaska Division of Geological & Geophysical Surveys and ALS Geochemistry The lab sample number is typically identical to the sample number. However, in some cases, the sample number used by the lab does differ from the published sample number. We provide both numbers to document instances in which the sample numbers listed on the Certificate of Assay or other laboratory results files were non-standard or found to be incorrect. BATCH_NUMBER Number provided by the laboratory to identify the samples and analyses included in the work order. ALS Geochemistry The batch numbers assigned by the lab for these results are: FA16097684 , FA16097742, and FA16137615 COLLECTOR The geologist who collected the sample. Alaska Division of Geological & Geophysical Surveys The samples presented in this report were collected by: Lauren Lande, Melanie Werdon, and Travis Naibert SIZE_FRACTION Sample splits were dry-sieved to less than 180 microns (-80 mesh) or to less than 75 microns (-200 mesh). ALS Geochemistry The sieve sizes used to process these samples: -200 and -80 LONGITUDE Longitude, WGS84 Alaska Division of Geological & Geophysical Surveys -144.019833 -143.096187 decimal degrees LATITUDE Latitude, WGS84 Alaska Division of Geological & Geophysical Surveys 63.027626 63.245385 decimal degrees FIELD_STATION_DESCRIPTION Description of the field station Alaska Division of Geological & Geophysical Surveys Characters 1 to 254 of a brief station description. SAMPLE_DESCRIPTION Description of the sample Alaska Division of Geological & Geophysical Surveys Characters 1 to 254 of a brief sample description. NULL We do not provide a description of the sample. Alaska Division of Geological & Geophysical Surveys STREAM_WIDTH_METERS The estimated average width of stream at the sample site. Alaska Division of Geological & Geophysical Surveys 1 16 meters STREAM_DEPTH_CM The estimated average depth of stream at the sample site. Alaska Division of Geological & Geophysical Surveys 0 35 centimeters STREAM_SPEED Qualitative description of the stream flow rate and stream channel morphology at the field station where the sample was collected. Alaska Division of Geological & Geophysical Surveys NULL Blank (NULL) field values indicate that this data was not recorded by the sample collector. Alaska Division of Geological & Geophysical Surveys swift fast moving water, many riffles, bed and bank are composed of cobbles and gravel with minor sand Alaska Division of Geological & Geophysical Surveys slow slow current, few riffles, bed and banks are composed of gravel and sand, minor cobbles and silt, organics may be present Alaska Division of Geological & Geophysical Surveys tumbling step-wise flows with plunges and pools, bed and banks are composed of boulders and cobbles with minor gravel and finer sediment Alaska Division of Geological & Geophysical Surveys ephemeral dry or nearly dry stream bed Alaska Division of Geological & Geophysical Surveys GRAIN_SIZE Estimated classification of the size of material that is the source of the sample. Alaska Division of Geological & Geophysical Surveys Unified Soil Classification System (USCS) United States Army Engineer Waterways Experiment Station (1960), The Unified Soil Classification System: Technical Memorandum No. 3-357, U.S. Army Engineer Waterways Experiment Station, Vicksburg, MS. SOURCE Description of depositional environment of the specific sample site.. Alaska Division of Geological & Geophysical Surveys eddy behind boulder or a log Gravel or sand deposited downstream of an obstruction such as a log or boulder Alaska Division of Geological & Geophysical Surveys middle of stream Gravel or sand deposited in the middle of the stream Alaska Division of Geological & Geophysical Surveys plunge pool or waterfall Sand or gravel deposited at the edge of a pool below a waterfall Alaska Division of Geological & Geophysical Surveys edge of stream Gravel or sand deposited along the edge of the stream Alaska Division of Geological & Geophysical Surveys bar in middle of stream Gravel or sand deposited on a bar in the middle of the stream Alaska Division of Geological & Geophysical Surveys eddy at edge of stream Gravel or sand deposited in an eddy at the edge of the stream Alaska Division of Geological & Geophysical Surveys gravel armor from stream Sediment trapped below pebble or cobble pavement at the leading edge of a gravel bar Alaska Division of Geological & Geophysical Surveys deep stagnant pool Body of standing water Alaska Division of Geological & Geophysical Surveys dry stream bed inactive or intermittently active stream bed which was dry when the sample was collected Alaska Division of Geological & Geophysical Surveys NUM_SITES Number of sample sites at the station. Alaska Division of Geological & Geophysical Surveys 1 4 NULL Blank (NULL) field values indicate that this data was not recorded by the sample collector. Alaska Division of Geological & Geophysical Surveys DIST_SAMP The total distance sampled along the stream bed (in meters) Alaska Division of Geological & Geophysical Surveys 1 30 meters NULL Blank (NULL) field values indicate that this data was not recorded by the sample collector. Alaska Division of Geological & Geophysical Surveys SED_COLOR Primary and, if applicable, secondary color of chemical or biogenic precipitate on the stream bed material qualitatively assigned by the sampler, no color palate or guide is used. Alaska Division of Geological & Geophysical Surveys The color selection values used in this table are: brown and gray WEIGHT_KG Sample weight (as received by the lab) in kilograms Alaska Division of Geological & Geophysical Surveys and ALS Geochemistry 2.42 10.17 kilograms Ag_ppm_ME-MS61 Silver values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.01 0.89 parts per million Al_pct_ME-MS61 Aluminum values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 4.83 11.1 percent As_ppm_ME-MS61 Arsenic values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 3.8 367 parts per million Ba_ppm_ME-MS61 Barium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 350 2050 parts per million Be_ppm_ME-MS61 Beryllium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 1.1 3.15 parts per million Bi_ppm_ME-MS61 Bismuth values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.14 4.9 parts per million Ca_pct_ME-MS61 Calcium values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.42 15 percent Cd_ppm_ME-MS61 Cadmium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.05 5.42 parts per million Ce_ppm_ME-MS61 Cerium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 41.2 314 parts per million Co_ppm_ME-MS61 Cobalt values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 5.2 46 parts per million Cr_ppm_ME-MS61 Chromium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 18 128 parts per million Cs_ppm_ME-MS61 Cesium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 1.61 6.98 parts per million Cu_ppm_ME-MS61 Copper values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 9 640 parts per million Fe_pct_ME-MS61 Iron values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 1.9 6.32 percent Ga_ppm_ME-MS61 Gallium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 12.25 31 parts per million Ge_ppm_ME-MS61 Germanium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.08 0.34 parts per million Hf_ppm_ME-MS61 Hafnium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.2 7.6 parts per million In_ppm_ME-MS61 Indium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.036 0.144 parts per million K_pct_ME-MS61 Potassium values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 1.22 4.3 percent La_ppm_ME-MS61 Lanthanum values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 20.3 154 parts per million Li_ppm_ME-MS61 Lithium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 13.4 46.8 parts per million Mg_pct_ME-MS61 Magnesium values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.41 2.18 percent Mn_ppm_ME-MS61 Manganese values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 256 1180 parts per million Mo_ppm_ME-MS61 Molybdenum values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.32 5.17 parts per million Na_pct_ME-MS61 Sodium values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.39 2.27 percent Nb_ppm_ME-MS61 Niobium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 7.5 30.4 parts per million Ni_ppm_ME-MS61 Nickel values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 8.2 138.5 parts per million P_ppm_ME-MS61 Phosphorus values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 360 1590 parts per million Pb_ppm_ME-MS61 Lead values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 7.9 68.5 parts per million Rb_ppm_ME-MS61 Rubidium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 42.5 194.5 parts per million Re_ppm_ME-MS61 Rhenium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and ALS Geochemistry 0.002 0.007 parts per million S_pct_ME-MS61 Sulfur values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.01 0.44 percent Sb_ppm_ME-MS61 Antimony values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.66 27.3 parts per million Sc_ppm_ME-MS61 Scandium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 9.2 28.2 parts per million Se_ppm_ME-MS61 Selenium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 1 5 parts per million Sn_ppm_ME-MS61 Tin values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 1.1 4.7 parts per million Sr_ppm_ME-MS61 Strontium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 60.9 464 parts per million Ta_ppm_ME-MS61 Tantalum values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.51 1.93 parts per million Te_ppm_ME-MS61 Tellurium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry -1 Below detection limit. Alaska Division of Geological & Geophysical Surveys and ALS Geochemistry 0.05 0.99 parts per million Th_ppm_ME-MS61 Thorium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 4.23 53.9 parts per million Ti_pct_ME-MS61 Titanium values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.183 0.745 percent Tl_ppm_ME-MS61 Thallium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.34 1.5 parts per million U_ppm_ME-MS61 Uranium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 1.1 8.7 parts per million V_ppm_ME-MS61 Vanadium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 37 184 parts per million W_ppm_ME-MS61 Tungsten values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 0.9 52.5 parts per million Y_ppm_ME-MS61 Yttrium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 8.9 53.9 parts per million Zn_ppm_ME-MS61 Zinc values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 35 748 parts per million Zr_ppm_ME-MS61 Zirconium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach ALS Geochemistry 5.1 241 parts per million Au_ppm_PGM-MS23 Gold values measured in parts per million; Method: Fire Assay - Inductively Coupled Plasma - Mass Spectrometry ALS Geochemistry -2 Above detection limit. Alaska Division of Geological & Geophysical Surveys and ALS Geochemistry 0.003 0.863 parts per million Pt_ppm_PGM-MS23 Platinum values measured in parts per million; Method: Fire Assay - Inductively Coupled Plasma - Mass Spectrometry ALS Geochemistry 0.0005 0.0034 parts per million Pd_ppm_PGM-MS23 Palladium values measured in parts per million; Method: Fire Assay - Inductively Coupled Plasma - Mass Spectrometry ALS Geochemistry 0.001 0.012 parts per million Au_ppm_Au-AA25 Gold values measured in parts per million; Method: Fire Assay - Atomic Absorption Spectroscopy ALS Geochemistry NULL Blank (NULL) field values may indicate that either the chemical species was not analyzed. ALS Geochemistry 1.1 1.24 parts per million Alaska Division of Geological & Geophysical Surveys mailing and physical

3354 College Road

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3354 College Road

Fairbanks AK 99709-3707 USA (907)451-5020 FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys. http://www.dggs.alaska.gov/metadata/dggs.ext dggs metadata extensions