Major-oxide and trace-element geochemical data from rocks collected in 2015 in the Wrangellia mineral assessment area, Alaska

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What does this data set describe?

Title:
Major-oxide and trace-element geochemical data from rocks collected in 2015 in the Wrangellia mineral assessment area, Alaska
Abstract:
Late Triassic mafic to ultramafic intrusions in the Wrangellia terrane are host to magmatic sulfide nickel-copper-cobalt and platinum-group element (PGE) mineralization. DGGS's mineral-resources group carried out a geologic mapping project in the eastern Denali Highway region between Watana Creek and Paxson from July 29 through August 7, 2015. This project is part of a multi-year effort focusing on improving the publicly available geological and geochemical data and assessing the mineral potential of the less-explored extension of the western Wrangellia terrane; other data resulting from this project include geophysical surveys and several geochemical datasets. This program of geologic mapping and rock sampling was conducted as part of the State of Alaska's Strategic and Critical Minerals Assessment project, an initiative designed to evaluate Alaska's potential for rare-earth elements, PGEs, and other similarly supply-challenged resources. Highlights of this project include identification, sampling, and characterization of a broad section of Wrangellia stratigraphy, including Late Triassic ultramafic and mafic intrusions thought to be a part of the Ni-Cu-Co-PGE- and Cu-Ag-mineralized Wrangellia large igneous province. This dataset includes four samples with high copper values (1.6 to 4.62 percent) and elevated silver values (10.15 to 18.25 ppm) and two samples have elevated copper (1,400 and 4,610 ppm); those samples are scattered throughout the area. Two samples from the Caribou Dome area show elevated platinum (0.113 and 0.101 ppm) and palladium (0.141 and 0.193 ppm). The analytical data tables associated with this report are being released in digital format as comma-delimited text (CSV) files.
Supplemental_Information:
border:    Outline of the study area.
rock-major-minor-oxide-trace-element-ree:    Major- and minor-oxide, trace-element, and rare-earth-element analysis of pulverized rock samples; includes magnetic susceptibility measurements
rock-trace-element-ree:    Trace-element analysis of pulverized rock samples; includes magnetic susceptibility measurements
  1. How should this data set be cited?

    Wypych, Alicja, Twelker, Evan, Freeman, L.K., Lande, Lauren, Newberry, R.J., Reioux, D.A., and Sicard, K.R., 2015, Major-oxide and trace-element geochemical data from rocks collected in 2015 in the Wrangellia mineral assessment area, Alaska: Raw Data File RDF 2015-16, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 4 p.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -147.965256
    East_Bounding_Coordinate: -145.779611
    North_Bounding_Coordinate: 63.352248
    South_Bounding_Coordinate: 62.855292

  3. What does it look like?

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

    Calendar_Date: 2015
    Currentness_Reference: publication date

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

    Geospatial_Data_Presentation_Form: report and digital data

  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?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest .000001. Longitudes are given to the nearest .000001. Latitude and longitude values are specified in decimal degrees.

      The horizontal datum used is World Geodetic System of 1984.
      The ellipsoid used is WGS 84.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257223563.

  7. How does the data set describe geographic features?

    rdf2015-16-border.shp
    Outline of the study area. (Source: Alaska Division of Geological & Geophysical Surveys)

    rdf2015-16-rock-major-minor-oxide-trace-element-ree.csv, rdf2015-16-rock-major-minor-oxide-trace-element-ree-limits.csv
    Major- and minor-oxide, trace-element, and rare-earth-element analysis of pulverized rock samples; includes magnetic susceptibility measurements. (Source: Alaska Division of Geological & Geophysical Surveys)

    SAMPLE
    Label assigned to identify the sample. (Source: 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. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Minerals)

    ValueDefinition
    NULLThe lab sample number is identical to the sample number.

    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. (Source: ALS Minerals)

    ValueDefinition
    NULLThe lab sample number is identical to the sample number.

    FA15140858

    LONGITUDE
    Longitude, WGS84 (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:-147.965256
    Maximum:-145.779611
    Units:decimal degrees

    LATITUDE
    Latitude, WGS84 (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:62.855292
    Maximum:63.352248
    Units:decimal degrees

    LOCATION_METHOD
    technique used to determine station location. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    GPSLocation data were collected using Trimble Juno T41/5 WAAS-enabled GPS devices running ArcGIS for Windows Mobile. WAAS-enabled GPS devices have a reported error of about 1 m.

    SAMPLE_MATERIAL
    Type of material that was sent to the lab for processing. (Source: Alaska Division of Geological & Geophysical Surveys)

    Rock

    COLLECTOR
    The geologist who collected the sample. (Source: Alaska Division of Geological & Geophysical Surveys)

    The samples presented in this report were collected by: Alicja Wypych, David Reioux, Evan Twelker, Karri Sicard, Larry Freeman, Lauren Lande, and Rainer Newberry

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

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

    DESCRIP_2
    Extension of the sample or station description for descriptions which are greater than 254 characters in length (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NULLThe descriptive text is shorter than 254 characters.

    Characters greater than 254 of the sample or station description.

    MAG_AVG
    average magnetic susceptibility (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NULLaverage magnetic susceptibility was not measured

    Range of values
    Minimum:0
    Maximum:108.5
    Units:10^-3 SI

    WEIGHT_KG
    Sample weight (as received by the lab) in kilograms (Source: Alaska Division of Geological & Geophysical Surveys and ALS Minerals)

    Range of values
    Minimum:0.09
    Maximum:2.06
    Units:kilograms

    Au_ppm_PGM-MS23
    Gold values measured in parts per million (ppm); Method: Fire Assay - Inductively Coupled Plasma - Mass Spectrometry (FA-ICP-MS); Lower detection limit = 0.001 ppm; Upper detection limit = 1 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.001
    Maximum:0.127
    Units:parts per million

    Pt_ppm_PGM-MS23
    Platinum values measured in parts per million (ppm); Method: Fire Assay - Inductively Coupled Plasma - Mass Spectrometry (FA-ICP-MS); Lower detection limit = 0.0005 ppm; Upper detection limit = 1 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.0005
    Maximum:0.113
    Units:parts per million

    Pd_ppm_PGM-MS23
    Palladium values measured in parts per million (ppm); Method: Fire Assay - Inductively Coupled Plasma - Mass Spectrometry (FA-ICP-MS); Lower detection limit = 0.001 ppm; Upper detection limit = 1 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.001
    Maximum:0.193
    Units:parts per million

    SiO2_pct_ME-ICP06
    Silicon dioxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:30.1
    Maximum:74.9
    Units:percent

    Al2O3_pct_ME-ICP06
    Aluminum oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.35
    Maximum:19.35
    Units:percent

    Fe2O3_pct_ME-ICP06
    Iron oxide (+3) values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:1.29
    Maximum:22.3
    Units:percent

    CaO_pct_ME-ICP06
    Calcium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.13
    Maximum:18.2
    Units:percent

    MgO_pct_ME-ICP06
    Magnesium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.38
    Maximum:42.4
    Units:percent

    Na2O_pct_ME-ICP06
    Sodium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.01
    Maximum:6.77
    Units:percent

    K2O_pct_ME-ICP06
    Potassium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.01
    Maximum:6.26
    Units:percent

    Cr2O3_pct_ME-ICP06
    Chromium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.01
    Maximum:1.01
    Units:percent

    TiO2_pct_ME-ICP06
    Titanium dioxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.03
    Maximum:3.19
    Units:percent

    MnO_pct_ME-ICP06
    Manganese oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.03
    Maximum:0.34
    Units:percent

    P2O5_pct_ME-ICP06
    Phosphorus oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.01
    Maximum:1.64
    Units:percent

    SrO_pct_ME-ICP06
    Strontium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.01
    Maximum:0.13
    Units:percent

    BaO_pct_ME-ICP06
    Barium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.01
    Maximum:0.78
    Units:percent

    LOI_pct_OA-GRA05
    Loss on Ignition values measured in percent (pct); Method: Gravimetric (GRAV), Thermal decomposition furnace; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:-0.04
    Maximum:14
    Units:percent

    Total_pct_TOT-ICP06
    Total values measured in percent (pct); Method: Calculation (Calculation); Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:98.04
    Maximum:101.95
    Units:percent

    C_pct_C-IR07
    Carbon values measured in percent (pct); Method: Combustion Furnace (Combustion Furnace); 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.01
    Maximum:2.46
    Units:percent

    S_pct_S-IR08
    Sulfur values measured in percent (pct); Method: Combustion Furnace (Combustion Furnace); 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.01
    Maximum:1.21
    Units:percent

    Ba_ppm_ME-MS81
    Barium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 0.5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:2.4
    Maximum:7750
    Units:parts per million

    Ce_ppm_ME-MS81
    Cerium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 0.5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.5
    Maximum:92
    Units:parts per million

    Cr_ppm_ME-MS81
    Chromium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:10
    Maximum:7030
    Units:parts per million

    Cs_ppm_ME-MS81
    Cesium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.01
    Maximum:5.35
    Units:parts per million

    Dy_ppm_ME-MS81
    Dysprosium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.09
    Maximum:9.9
    Units:parts per million

    Er_ppm_ME-MS81
    Erbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.03
    Maximum:5.25
    Units:parts per million

    Eu_ppm_ME-MS81
    Europium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.03
    Maximum:3.1
    Units:parts per million

    Ga_ppm_ME-MS81
    Gallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    Range of values
    Minimum:1
    Maximum:26.1
    Units:parts per million

    Gd_ppm_ME-MS81
    Gadolinium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.11
    Maximum:10.95
    Units:parts per million

    Ge_ppm_ME-MS81
    Germanium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 5 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Hf_ppm_ME-MS81
    Hafnium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.2
    Maximum:7.6
    Units:parts per million

    Ho_ppm_ME-MS81
    Holmium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.01
    Maximum:1.9
    Units:parts per million

    La_ppm_ME-MS81
    Lanthanum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 0.5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.5
    Maximum:51.5
    Units:parts per million

    Lu_ppm_ME-MS81
    Lutetium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.01
    Maximum:0.69
    Units:parts per million

    Nb_ppm_ME-MS81
    Niobium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.2
    Maximum:40.5
    Units:parts per million

    Nd_ppm_ME-MS81
    Neodymium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    Range of values
    Minimum:0.2
    Maximum:40.1
    Units:parts per million

    Pr_ppm_ME-MS81
    Praseodymium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    Range of values
    Minimum:0.04
    Maximum:10.3
    Units:parts per million

    Rb_ppm_ME-MS81
    Rubidium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    Range of values
    Minimum:0.2
    Maximum:154.5
    Units:parts per million

    Sm_ppm_ME-MS81
    Samarium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.05
    Maximum:10.6
    Units:parts per million

    Sn_ppm_ME-MS81
    Tin values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:1
    Maximum:129
    Units:parts per million

    Sr_ppm_ME-MS81
    Strontium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    Range of values
    Minimum:1.5
    Maximum:1120
    Units:parts per million

    Ta_ppm_ME-MS81
    Tantalum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.1
    Maximum:2.1
    Units:parts per million

    Tb_ppm_ME-MS81
    Terbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.01
    Maximum:1.73
    Units:parts per million

    Th_ppm_ME-MS81
    Thorium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.05
    Maximum:10.35
    Units:parts per million

    Tm_ppm_ME-MS81
    Thulium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.01
    Maximum:0.72
    Units:parts per million

    U_ppm_ME-MS81
    Uranium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.05
    Maximum:3.91
    Units:parts per million

    V_ppm_ME-MS81
    Vanadium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:5
    Maximum:916
    Units:parts per million

    W_ppm_ME-MS81
    Tungsten values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:1
    Maximum:3
    Units:parts per million

    Y_ppm_ME-MS81
    Yttrium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 0.5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.7
    Maximum:50.1
    Units:parts per million

    Yb_ppm_ME-MS81
    Ytterbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

    Range of values
    Minimum:0.03
    Maximum:4.7
    Units:parts per million

    Zr_ppm_ME-MS81
    Zirconium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:2
    Maximum:346
    Units:parts per million

    As_ppm_ME-MS42
    Arsenic values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.1 ppm; Upper detection limit = 250 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.1
    Maximum:81.7
    Units:parts per million

    Bi_ppm_ME-MS42
    Bismuth values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.01 ppm; Upper detection limit = 250 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.01
    Maximum:0.19
    Units:parts per million

    Hg_ppm_ME-MS42
    Mercury values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.005 ppm; Upper detection limit = 25 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.005
    Maximum:0.582
    Units:parts per million

    In_ppm_ME-MS42
    Indium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.005 ppm; Upper detection limit = 250 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.005
    Maximum:0.096
    Units:parts per million

    Re_ppm_ME-MS42
    Rhenium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.001 ppm; Upper detection limit = 250 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

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

    Sb_ppm_ME-MS42
    Antimony values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.05 ppm; Upper detection limit = 250 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.05
    Maximum:1.76
    Units:parts per million

    Se_ppm_ME-MS42
    Selenium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.2 ppm; Upper detection limit = 250 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.2
    Maximum:2.4
    Units:parts per million

    Te_ppm_ME-MS42
    Tellurium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.01 ppm; Upper detection limit = 250 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.01
    Maximum:0.33
    Units:parts per million

    Tl_ppm_ME-MS42
    Thallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.02 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.02
    Maximum:0.52
    Units:parts per million

    Ag_ppm_ME-4ACD81
    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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.5
    Maximum:1.3
    Units:parts per million

    Cd_ppm_ME-4ACD81
    Cadmium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.5 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

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

    Co_ppm_ME-4ACD81
    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: ALS Minerals)

    Range of values
    Minimum:2
    Maximum:176
    Units:parts per million

    Cu_ppm_ME-4ACD81
    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: ALS Minerals)

    Range of values
    Minimum:1
    Maximum:1400
    Units:parts per million

    Li_ppm_ME-4ACD81
    Lithium 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:10
    Maximum:50
    Units:parts per million

    Mo_ppm_ME-4ACD81
    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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:1
    Maximum:2
    Units:parts per million

    Ni_ppm_ME-4ACD81
    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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:1
    Maximum:2960
    Units:parts per million

    Pb_ppm_ME-4ACD81
    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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:2
    Maximum:20
    Units:parts per million

    Sc_ppm_ME-4ACD81
    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: ALS Minerals)

    Range of values
    Minimum:1
    Maximum:59
    Units:parts per million

    Zn_ppm_ME-4ACD81
    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: ALS Minerals)

    Range of values
    Minimum:17
    Maximum:232
    Units:parts per million

    rdf2015-16-rock-trace-element-ree.csv, rdf2015-16-rock-trace-element-ree-limits.csv
    Trace-element analysis of pulverized rock samples; includes magnetic susceptibility measurements. (Source: Alaska Division of Geological & Geophysical Surveys)

    SAMPLE
    Label assigned to identify the sample. (Source: 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. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Minerals)

    ValueDefinition
    NULLThe lab sample number is identical to the sample number.

    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. (Source: ALS Minerals)

    ValueDefinition
    NULLThe lab sample number is identical to the sample number.

    FA15140887

    LONGITUDE
    Longitude, WGS84 (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:-147.964956
    Maximum:-145.867279
    Units:decimal degrees

    LATITUDE
    Latitude, WGS84 (Source: Alaska Division of Geological & Geophysical Surveys)

    Range of values
    Minimum:62.859736
    Maximum:63.350462
    Units:decimal degrees

    LOCATION_METHOD
    technique used to determine station location. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    GPSLocation data were collected using Trimble Juno T41/5 WAAS-enabled GPS devices running ArcGIS for Windows Mobile. WAAS-enabled GPS devices have a reported error of about 1 m.
    visual approximationSample location coordinates were estimated from topographic map features. The position error is approximately 100 meters.

    SAMPLE_MATERIAL
    Type of material that was sent to the lab for processing. (Source: Alaska Division of Geological & Geophysical Surveys)

    Rock

    COLLECTOR
    The geologist who collected the sample. (Source: Alaska Division of Geological & Geophysical Surveys)

    The samples presented in this report were collected by: Alicja Wypych, David Reioux, Evan Twelker, Karri Sicard, Larry Freeman, Lauren Lande, and T.E. Smith

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

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

    DESCRIP_2
    Extension of the sample or station description for descriptions which are greater than 254 characters in length (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NULLThe descriptive text is shorter than 254 characters.

    Characters greater than 254 of the sample or station description.

    MAG_AVG
    average magnetic susceptibility (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NULLaverage magnetic susceptibility was not measured

    Range of values
    Minimum:0
    Maximum:102.53
    Units:10^-3 SI

    WEIGHT_KG
    Sample weight (as received by the lab) in kilograms (Source: Alaska Division of Geological & Geophysical Surveys and ALS Minerals)

    Range of values
    Minimum:0.1
    Maximum:2.54
    Units:kilograms

    Au_ppm_PGM-MS23
    Gold values measured in parts per million (ppm); Method: Fire Assay - Inductively Coupled Plasma - Mass Spectrometry (FA-ICP-MS); Lower detection limit = 0.001 ppm; Upper detection limit = 1 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.001
    Maximum:0.159
    Units:parts per million

    Pt_ppm_PGM-MS23
    Platinum values measured in parts per million (ppm); Method: Fire Assay - Inductively Coupled Plasma - Mass Spectrometry (FA-ICP-MS); Lower detection limit = 0.0005 ppm; Upper detection limit = 1 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.001
    Maximum:0.0208
    Units:parts per million

    Pd_ppm_PGM-MS23
    Palladium values measured in parts per million (ppm); Method: Fire Assay - Inductively Coupled Plasma - Mass Spectrometry (FA-ICP-MS); Lower detection limit = 0.001 ppm; Upper detection limit = 1 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.001
    Maximum:0.045
    Units:parts per million

    Ag_ppm_ME-MS61
    Silver values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.01 ppm; Upper detection limit = 100 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.03
    Maximum:54.4
    Units:parts per million

    Al_pct_ME-MS61
    Aluminum values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:0.19
    Maximum:8.38
    Units:percent

    As_ppm_ME-MS61
    Arsenic values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:1.4
    Maximum:138.5
    Units:parts per million

    Ba_ppm_ME-MS61
    Barium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:10
    Maximum:2170
    Units:parts per million

    Be_ppm_ME-MS61
    Beryllium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:0.06
    Maximum:0.96
    Units:parts per million

    Bi_ppm_ME-MS61
    Bismuth values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:0.02
    Maximum:0.52
    Units:parts per million

    Ca_pct_ME-MS61
    Calcium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:0.1
    Maximum:24.9
    Units:percent

    Cd_ppm_ME-MS61
    Cadmium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.02 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.03
    Maximum:528
    Units:parts per million

    Ce_ppm_ME-MS61
    Cerium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.01 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:1.27
    Maximum:30.3
    Units:parts per million

    Co_ppm_ME-MS61
    Cobalt values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:3.3
    Maximum:127
    Units:parts per million

    Cr_ppm_ME-MS61
    Chromium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:4
    Maximum:3650
    Units:parts per million

    Cs_ppm_ME-MS61
    Cesium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.05 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.09
    Maximum:2.58
    Units:parts per million

    Cu_ppm_ME-MS61
    Copper values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    ValueDefinition
    -2Above detection limit.

    Range of values
    Minimum:22.7
    Maximum:4610
    Units:parts per million

    Fe_pct_ME-MS61
    Iron values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:2.96
    Maximum:26.3
    Units:percent

    Ga_ppm_ME-MS61
    Gallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.05 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.69
    Maximum:20.1
    Units:parts per million

    Ge_ppm_ME-MS61
    Germanium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.05 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.05
    Maximum:1.05
    Units:parts per million

    Hf_ppm_ME-MS61
    Hafnium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.1 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.1
    Maximum:3.8
    Units:parts per million

    In_ppm_ME-MS61
    Indium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.005 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.005
    Maximum:0.142
    Units:parts per million

    K_pct_ME-MS61
    Potassium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:0.02
    Maximum:3.31
    Units:percent

    La_ppm_ME-MS61
    Lanthanum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:0.7
    Maximum:15.8
    Units:parts per million

    Li_ppm_ME-MS61
    Lithium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:0.8
    Maximum:38.3
    Units:parts per million

    Mg_pct_ME-MS61
    Magnesium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:0.22
    Maximum:16.95
    Units:percent

    Mn_ppm_ME-MS61
    Manganese values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 5 ppm; Upper detection limit = 100000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:304
    Maximum:2590
    Units:parts per million

    Mo_ppm_ME-MS61
    Molybdenum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.05 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.15
    Maximum:75.3
    Units:parts per million

    Na_pct_ME-MS61
    Sodium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:0.01
    Maximum:3.07
    Units:percent

    Nb_ppm_ME-MS61
    Niobium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.1 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.2
    Maximum:14.8
    Units:parts per million

    Ni_ppm_ME-MS61
    Nickel values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:7
    Maximum:1050
    Units:parts per million

    P_ppm_ME-MS61
    Phosphorus values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:160
    Maximum:5900
    Units:parts per million

    Pb_ppm_ME-MS61
    Lead values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:0.5
    Maximum:118
    Units:parts per million

    Rb_ppm_ME-MS61
    Rubidium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:0.5
    Maximum:42.3
    Units:parts per million

    Re_ppm_ME-MS61
    Rhenium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.002 ppm; Upper detection limit = 50 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.002
    Maximum:0.214
    Units:parts per million

    S_pct_ME-MS61
    Sulfur values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

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

    Range of values
    Minimum:0.1
    Maximum:7.44
    Units:percent

    Sb_ppm_ME-MS61
    Antimony values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.05 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.09
    Maximum:4.31
    Units:parts per million

    Sc_ppm_ME-MS61
    Scandium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:0.4
    Maximum:45.7
    Units:parts per million

    Se_ppm_ME-MS61
    Selenium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 1 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:1
    Maximum:8
    Units:parts per million

    Sn_ppm_ME-MS61
    Tin values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.2 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.2
    Maximum:2
    Units:parts per million

    Sr_ppm_ME-MS61
    Strontium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:10.6
    Maximum:586
    Units:parts per million

    Ta_ppm_ME-MS61
    Tantalum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.05 ppm; Upper detection limit = 100 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.06
    Maximum:0.9
    Units:parts per million

    Te_ppm_ME-MS61
    Tellurium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.05 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.05
    Maximum:3.19
    Units:parts per million

    Th_ppm_ME-MS61
    Thorium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.2
    Maximum:4.4
    Units:parts per million

    Ti_pct_ME-MS61
    Titanium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.005 pct; Upper detection limit = 10 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:0.009
    Maximum:1.675
    Units:percent

    Tl_ppm_ME-MS61
    Thallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.02 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.02
    Maximum:126.5
    Units:parts per million

    U_ppm_ME-MS61
    Uranium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:0.1
    Maximum:4.7
    Units:parts per million

    V_ppm_ME-MS61
    Vanadium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:11
    Maximum:582
    Units:parts per million

    W_ppm_ME-MS61
    Tungsten values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:0.1
    Maximum:1
    Units:parts per million

    Y_ppm_ME-MS61
    Yttrium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.1 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:1.7
    Maximum:30.3
    Units:parts per million

    Zn_ppm_ME-MS61
    Zinc values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

    Range of values
    Minimum:21
    Maximum:2760
    Units:parts per million

    Zr_ppm_ME-MS61
    Zirconium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

    Range of values
    Minimum:4.1
    Maximum:150
    Units:parts per million

    Cu_pct_Cu-OG62
    Copper values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl; Lower detection limit = 0.001 pct; Upper detection limit = 40 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

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

    Range of values
    Minimum:1.645
    Maximum:20.6
    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?

    This project is funded by Capital Improvement Project funds through the State's Strategic and Critical Minerals Assessment program, a component of the Alaska Airborne Geophysical/Geological Mineral Inventory Program founded 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
    GIS Manager
    3354 College Road
    Fairbanks, AK 99709-3707
    USA

    (907)451-5020 (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?

This project is a part of a multi-year program focusing on improving Alaska's publicly-available geological and geochemical data and assessing the mineral potential of the less-explored regions of Alaska.


How was the data set created?

  1. From what previous works were the data drawn?

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

    Date: 2015 (process 1 of 6)
    Sample collection - Rock samples were collected for two different purposes. First, samples of visibly mineralized or altered rock were preferentially collected and analyzed for trace-element geochemistry. Second, igneous and meta-igneous rocks showing little alteration or weathering were collected for whole-rock major-oxide, minor-oxide, and trace-element analyses to aid in classification and study of petrogenesis and tectonic setting. Most samples are 'grab' samples, which were randomly collected at a location. However, a few samples are 'select' samples, which were deliberately collected from a specific feature, as noted in the sample field description.

    Date: 2015 (process 2 of 6)
    Sample preparation - Rock samples were processed by ALS Minerals using their PREP-31 package. The samples were crushed to better than 70 percent passing 2 mm, and a 250 g split was pulverized to better than 85 percent passing 75 microns. Prior to crushing, samples for whole-rock analysis were trimmed by DGGS staff to remove weathering, and cut surfaces were sanded to remove any saw metal.

    Date: 2015 (process 3 of 6)
    Magnetic susceptibility measurements - Magnetic susceptibility measurements were collected using Terraplus KT 5, 6, 9, and 10 model handheld magnetic susceptibility meters. The values reported here are the average of four individual measurements performed on representative surfaces of the sampled rock outcrop.

    Date: 2015 (process 4 of 6)
    Major- and trace-element compositions - Major- and trace-element including rare-earth element compositions for rock samples were determined by ALS Minerals method ME-ICP61r: Four-acid digestion followed by inductively-coupled plasma-atomic emission spectrometry (ICP-AES) and inductively-coupled plasma-mass spectroscopy (ICP-MS). Samples that exceeded detection limits for elements of interest were reanalyzed using specific elemental tests. Over-limit values for Cu were reanalyzed using four-acid digestion and ICP-AES (ALS Minerals procedure ME-OG62).

    Date: 2015 (process 5 of 6)
    Platinum, palladium, and gold values - Platinum, palladium, and gold values were analyzed by 30 gram fire assay with ICP-MS finish (ALS Minerals method PGM-MS23).

    Date: 2015 (process 6 of 6)
    Whole-rock geochemistry, major and minor oxides - major and minor oxides were analyzed by lithium metaborate fusion digestion and ICP-AES (ALS Minerals method ME-ICP06). Trace elements, including rare-earth elements, were determined using lithium metaborate fusion digestion and ICP-MS (ALS Minerals method ME-MS81). Ag, Cd, Co, Cu, Li, Mo, Ni, Pb, Sc, and Zn were determined by four-acid digestion and ICP-AES (ALS Minerals method ME-4ACD81); and As, Bi, Hg, In, Re, Sb, Se, Te, and Tl were determined by aqua regia digestion followed by ICP-MS (ALS Minerals method ME-MS42). Total C and S were analyzed by LECO furnace (ALS Minerals method C-IR07 and S-IR08, respectively).

  3. What similar or related data should the user be aware of?

    Burns, L.E., CGG, and Fugro GeoServices, Inc., 2014, Wrangellia survey area: Airborne magnetic and electromagnetic data in line (point), grid, vector, and map formats, Talkeetna Mountains, Healy, and Mt. Hayes quadrangles, south-central Alaska: Geophysical Report GPR 2014-1, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 56 sheets, 1 DVD, scale 1:63,360
    Csejtey, Bela, Jr., Nelson, W.H., Jones, D.L., Silberling, N.J., Dean, R.M., Morris, M.S., Lanphere, M.A., Smith, J.G., and Silberman, M.L., 1978, Reconnaissance geologic map and geochronology, Talkeetna Mountains Quadrangle, northern part of Anchorage Quadrangle, and southwest corner of Healy Quadrangle, Alaska: Open-File Report OF 78-558-A, U.S. Geological Survey, United States.

    Online Links:

    Other_Citation_Details: 60 p., 1 sheet, scale 1:250,000
    Schmidt, J.M., Werdon, M.B., and Wardlaw, Bruce, 2003, New mapping near Iron Creek, Talkeetna Mountains, indicates presence of Nikolai greenstone: Professional Report PR 120J, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: p. 101-108
    Twelker, Evan, Bachmann, E.N., Freeman, L.K., Newberry, R.J., Reioux, D.A., Sicard, K.R., Tuzzolino, A.L., Wright, T.C., and Wypych, Alicja, 2014, Major-oxide, minor-oxide, and trace-element geochemical data from rocks and stream sediments in the Wrangellia mineral assessment area, Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles, Alaska: Raw Data File RDF 2014-3, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 6 p
    Twelker, Evan, Hubbard, T.D., Wypych, Alicja, Sicard, K.R., Newberry, R.J., Reioux, D.A., Freeman, L.K., and Lande, L.L., 2015, Geologic map of the Talkeetna Mountains C-4 Quadrangle and adjoining areas, central Alaska: Preliminary Interpretive Report PIR 2015-6, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 16 p., 1 sheet, scale 1:50,000
    Werdon, M.B., Azain, J.S., and Granitto, Matthew, 2014, Reanalysis of historical U.S. Geological Survey sediment samples for geochemical data from the western part of the Wrangellia terrane, Anchorage, Gulkana, Healy, Mt. Hayes, Nabesna, and Talkeetna Mountains quadrangles, Alaska: Raw Data File RDF 2014-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 6 p
    Werdon, M.B., Riehle, J.R., Schmidt, J.M., Newberry, R.J., and Pessel, G.H., 2002, Geologic map of the Iron Creek area, Talkeetna Mountains B-5 Quadrangle, Alaska: Preliminary Interpretive Report PIR 2002-4, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360
    Wypych, Alicja, Twelker, Evan, Freeman, L.K., Lande, Lauren, Newberry, R.J., Reioux, D.A., and Sicard, K.R., 2014, Major-oxide and trace-element geochemical data from rocks collected in 2014 in the Wrangellia mineral assessment area, Talkeetna Mountains C-4, C-3, and B-4 quadrangles, Alaska: Raw Data File RDF 2014-22, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 4 p


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

  1. How well have the observations been checked?

    Coordinates of modern sample locations were determined by the geologists in the field using using Trimble Juno T41/5 WAAS-enabled GPS devices running ArcGIS for Windows Mobile. Eight legacy samples from the Caribou Dome (also known as Denali Copper) underground workings were obtained from the University of Alaska Fairbanks collection; the locations provided for these samples are visual approximations. 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. In addition to ALS Minerals' accredited (ISO/IEC 17025-2005) internal quality-control program, DGGS monitored analysis quality with one standard reference material per batch of 20 analyses. 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.

  2. How accurate are the geographic locations?

    Location data for modern samples were collected using Trimble Juno T41/5 WAAS-enabled GPS devices running ArcGIS for Windows Mobile. Data were merged into an ArcGIS geodatabase. WAAS-enabled GPS devices have a reported error of about 1 m. Latitude and longitude are reported in the WGS84 datum. Eight samples from the Caribou Dome (also known as Denali Copper) underground workings were obtained from the University of Alaska Fairbanks collection; the locations provided for these samples are visual approximations.

  3. How accurate are the heights or depths?

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

    This data release is complete. The data tables have been lightly edited for clarity, but are generally provided as received from the lab.

  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 2015-16

  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: 23-Oct-2015
Metadata author:
Alaska Division of Geological & Geophysical Surveys
Metadata Manager
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:


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