Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the northeastern Alaska Range, Healy, Mount Hayes, Nabesna, and Tanacross quadrangles, Alaska

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What does this data set describe?

Title:
Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the northeastern Alaska Range, Healy, Mount Hayes, Nabesna, and Tanacross quadrangles, Alaska
Abstract:
The State of Alaska's Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project (CIP), is designed to evaluate Alaska's statewide potential for SCM resources. The SCM Assessment is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. For the geochemical part of the SCM Assessment, thousands of historical geochemical samples from DGGS, U.S. Geological Survey (USGS), and U.S. Bureau of Mines archives are being reanalyzed by DGGS using modern, quantitative, geochemical-analytical methods. The objective is to update the statewide geochemical database to more clearly identify areas in Alaska with SCM potential. For this report, DGGS funded reanalysis of 1,682 historical USGS sediment samples from the statewide Alaska Geochemical Database Version 2.0 (AGDB2; Granitto and others, 2013). Samples were chosen from an area covering northeastern Alaska Range, Healy, Mount Hayes, Nabesna, and Tanacross quadrangles, Alaska. USGS was responsible for sample retrieval from the Denver warehouse through the final quality assurance/quality control (QA/QC) of the geochemical analyses obtained through the USGS contract lab. The new geochemical data are published in this report as a coauthored DGGS report, and will be incorporated into the statewide geochemical databases of both agencies.
Supplemental_Information: 
border:    Outline of the study area.
sed-trace-element:    Trace-element geochemical analysis of sediment samples
  1. How should this data set be cited?

    Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the northeastern Alaska Range, Healy, Mount Hayes, Nabesna, and Tanacross quadrangles, Alaska: Raw Data File RDF 2015-7, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 6 p.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -147.123890
    East_Bounding_Coordinate: -143.006940
    North_Bounding_Coordinate: 63.809720
    South_Bounding_Coordinate: 62.614720

  3. What does it look like?

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

    Calendar_Date: 2015
    Currentness_Reference: ground condition

  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 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in decimal degrees.

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.9786982.

  7. How does the data set describe geographic features?

    rdf2015-7-border.shp
    Outline of the study area. (Source: Alaska Division of Geological & Geophysical Surveys)

    rdf2015-7-sed-trace-element.xlsx, rdf2015-7-sed-trace-element-limits.csv
    Trace-element geochemical analysis of sediment samples. (Source: Alaska Division of Geological & Geophysical Surveys)

    FIELD_ID
    Label assigned by the originating scientist or agency (Source: Granitto, Matthew and others, 2013)

    A comprehensive list of references and original data sources can be found in the accompanying report.

    USGS_DATABASE_ID
    Label assigned in Alaska Geochemical Database Version 2.0 to uniquely identify each sample (Source: Granitto, Matthew and others, 2013)

    Free text

    JOB_ID
    Number provided by the laboratory to identify the samples and analyses included in the work order. (Source: SGS Minerals Services)

    The job numbers assigned by the lab for these results are: 626, 746, 920, 1033, 1034, 1047, 1048, 1049, 3264, 5023, 5161, 5177, 5195, 5212, 5217, 5241, 5321, 5376, 5384, 5417, 5497, 10046, 10047, 10051, 10053, 10063, 10069, 10075, 10166, 11215, 11371, 11379, 11386, 11387, 11395, 11403, 11408, 11508, 11509, 11567, 11704, 11791, 11972, MRP03439, MRP08293, and MRP09159

    LATITUDE
    Latitude, NAD27 (Source: Granitto, Matthew and others, 2013)

    Range of values
    Minimum:62.61472
    Maximum:63.80972
    Units:decimal degrees

    LONGITUDE
    Longitude, NAD27 (Source: Granitto, Matthew and others, 2013)

    Range of values
    Minimum:-147.12389
    Maximum:-143.00694
    Units:decimal degrees

    SAMPLE_SOU
    Type of environment from which the sample was collected. (Source: Granitto, Matthew and others, 2013)

    The sample environments: stream, and glacial debris/deposit

    METHOD_COL
    Information about how the sample was collected. (Source: Granitto, Matthew and others, 2013)

    Sample collection methods include: grab/single and composite

    PRIMARY_CL
    Type of material that was sampled. (Source: Granitto, Matthew and others, 2013)

    All samples in this release were originally sediment samples

    BATCH_NUMBER
    Number provided by the laboratory to identify the samples and analyses included in the work order. (Source: SGS Minerals Services)

    The batch numbers assigned by the lab for these results are: MRP-13892, MRP-13894, MRP-13896, MRP-13898, MRP-13900, MRP-13902, MRP-13904, MRP-13906, MRP-13908, MRP-13910, MRP-13940, MRP-13942, MRP-13944, MRP-13946, and MRP-13974

    LAB_SAMPLE_NUMBER
    Label used by the lab to identify the sample. (Source: SGS Minerals Services)

    The sample numbers used by the lab differ from the published sample numbers. We provide both numbers to document the sample number that was listed on the Certificate of Assay

    Au_ppb
    Gold values measured in parts per billion); Method: Fire Assay - Inductively Coupled Plasma - Mass Spectrometry (FA-ICP-MS); Lower detection limit = 1 parts per billion; Upper detection limit = 10000 parts per billion; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

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

    Range of values
    Minimum:2
    Maximum:390
    Units:parts per billion

    Pd_ppb
    Palladium values measured in parts per billion); Method: Fire Assay - Inductively Coupled Plasma - Mass Spectrometry (FA-ICP-MS); Lower detection limit = 1 parts per billion; Upper detection limit = 10000 parts per billion; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

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

    Range of values
    Minimum:2
    Maximum:21
    Units:parts per billion

    Pt_ppb
    Platinum values measured in parts per billion); Method: Fire Assay - Inductively Coupled Plasma - Mass Spectrometry (FA-ICP-MS); Lower detection limit = 0.5 parts per billion; Upper detection limit = 10000 parts per billion; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

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

    Range of values
    Minimum:1
    Maximum:11
    Units:parts per billion

    Al_pct
    Aluminum values measured in percent); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.01 percent; Upper detection limit = 25 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:1.43
    Maximum:12.8
    Units:percent

    Ca_pct
    Calcium values measured in percent); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.1 percent; Upper detection limit = 40 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.17
    Maximum:6.00
    Units:percent

    Fe_pct
    Iron values measured in percent); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.01 percent; Upper detection limit = 50 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:1.07
    Maximum:13.1
    Units:percent

    K_pct
    Potassium values measured in percent); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.1 percent; Upper detection limit = 25 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.38
    Maximum:5.97
    Units:percent

    Mg_pct
    Magnesium values measured in percent); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.01 percent; Upper detection limit = 30 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.17
    Maximum:19.1
    Units:percent

    Mn_pct
    Manganese values measured in percent); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.001 percent; Upper detection limit = 10 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.007
    Maximum:0.457
    Units:percent

    P_pct
    Phosphorus values measured in percent); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.01 percent; Upper detection limit = 0.25 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.02
    Maximum:0.44
    Units:percent

    Ti_pct
    Titanium values measured in percent); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.01 percent; Upper detection limit = 25 percent; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.09
    Maximum:3.43
    Units:percent

    Ag_ppm
    Silver values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 1 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

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

    As_ppm
    Arsenic values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 30 parts per million; Upper detection limit = 100000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:30
    Maximum:890
    Units:parts per million

    Ba_ppm
    Barium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.5 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -2Above detection limit.

    Range of values
    Minimum:266
    Maximum:8840
    Units:parts per million

    Be_ppm
    Beryllium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 5 parts per million; Upper detection limit = 2500 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:5
    Maximum:9
    Units:parts per million

    Bi_ppm
    Bismuth values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.1 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.1
    Maximum:5.8
    Units:parts per million

    Cd_ppm
    Cadmium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.2 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.2
    Maximum:19.0
    Units:parts per million

    Ce_ppm
    Cerium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.1 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:13.4
    Maximum:227
    Units:parts per million

    Co_ppm
    Cobalt values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.5 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:2.3
    Maximum:93.4
    Units:parts per million

    Cr_ppm
    Chromium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 10 parts per million; Upper detection limit = 100000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:10
    Maximum:7210
    Units:parts per million

    Cs_ppm
    Cesium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.1 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.4
    Maximum:13.9
    Units:parts per million

    Cu_ppm
    Copper values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 5 parts per million; Upper detection limit = 50000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:5
    Maximum:270
    Units:parts per million

    Dy_ppm
    Dysprosium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.05 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.97
    Maximum:12.3
    Units:parts per million

    Er_ppm
    Erbium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.05 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.54
    Maximum:6.66
    Units:parts per million

    Eu_ppm
    Europium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.05 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.27
    Maximum:2.83
    Units:parts per million

    Ga_ppm
    Gallium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 1 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:4
    Maximum:35
    Units:parts per million

    Gd_ppm
    Gadolinium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.05 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:1.32
    Maximum:12.9
    Units:parts per million

    Ge_ppm
    Germanium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 1 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

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

    Hf_ppm
    Hafnium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 1 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:1
    Maximum:35
    Units:parts per million

    Ho_ppm
    Holmium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.05 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.20
    Maximum:2.46
    Units:parts per million

    In_ppm
    Indium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.2 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.2
    Maximum:0.3
    Units:parts per million

    La_ppm
    Lanthanum values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.1 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:6.9
    Maximum:120
    Units:parts per million

    Li_ppm
    Lithium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 10 parts per million; Upper detection limit = 50000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:10
    Maximum:140
    Units:parts per million

    Lu_ppm
    Lutetium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.05 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.08
    Maximum:1.00
    Units:parts per million

    Mo_ppm
    Molybdenum values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 2 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:2
    Maximum:56
    Units:parts per million

    Nb_ppm
    Niobium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 1 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:3
    Maximum:79
    Units:parts per million

    Nd_ppm
    Neodymium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.1 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:6.6
    Maximum:84.4
    Units:parts per million

    Ni_ppm
    Nickel values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 5 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:6
    Maximum:1750
    Units:parts per million

    Pb_ppm
    Lead values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 5 parts per million; Upper detection limit = 50000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:5
    Maximum:133
    Units:parts per million

    Pr_ppm
    Praseodymium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.05 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:1.60
    Maximum:24.1
    Units:parts per million

    Rb_ppm
    Rubidium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.2 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:9.5
    Maximum:276
    Units:parts per million

    Sb_ppm
    Antimony values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.1 parts per million; Upper detection limit = 500 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.1
    Maximum:90.1
    Units:parts per million

    Sc_ppm
    Scandium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 5 parts per million; Upper detection limit = 50000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:5
    Maximum:43
    Units:parts per million

    Sm_ppm
    Samarium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.1 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:1.3
    Maximum:15.4
    Units:parts per million

    Sn_ppm
    Tin values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 1 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:1
    Maximum:384
    Units:parts per million

    Sr_ppm
    Strontium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.1 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:43.2
    Maximum:979
    Units:parts per million

    Ta_ppm
    Tantalum values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.5 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.5
    Maximum:14.7
    Units:parts per million

    Tb_ppm
    Terbium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.05 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.17
    Maximum:2.03
    Units:parts per million

    Th_ppm
    Thorium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.1 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:1.0
    Maximum:91.8
    Units:parts per million

    Tl_ppm
    Thallium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.5 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.5
    Maximum:3.0
    Units:parts per million

    Tm_ppm
    Thulium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.05 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.08
    Maximum:1.09
    Units:parts per million

    U_ppm
    Uranium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.05 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.59
    Maximum:43.9
    Units:parts per million

    V_ppm
    Vanadium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 5 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:24
    Maximum:755
    Units:parts per million

    W_ppm
    Tungsten values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 1 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:1
    Maximum:62
    Units:parts per million

    Y_ppm
    Yttrium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.5 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:5.5
    Maximum:65.6
    Units:parts per million

    Yb_ppm
    Ytterbium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.1 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:0.5
    Maximum:6.5
    Units:parts per million

    Zn_ppm
    Zinc values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 5 parts per million; Upper detection limit = 50000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:19
    Maximum:1720
    Units:parts per million

    Zr_ppm
    Zirconium values measured in parts per million); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), Sodium Peroxide Sinter; Lower detection limit = 0.5 parts per million; Upper detection limit = 10000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

    Range of values
    Minimum:32.9
    Maximum:1290
    Units:parts per million

    Te_ppm
    Tellurium values measured in parts per million); Method: Hydride Generation Atomic Absorption Spectrometry (HGAAS), Multi-Acid Digestion and Hydride Generation; Lower detection limit = 0.5 parts per million; Upper detection limit = 1000 parts per million; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: SGS Minerals Services)

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

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

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?

    We appreciate the help of the following people: Timothy Hayes and Coleen Chaney in writing the Technical Assistance Agreement for this project; and Jeffrey L. Mauk and Bronwen Wang for reviewing this report and associated digital tables. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

  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?

The State of Alaska's Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project (CIP), is designed to evaluate Alaska's statewide potential for SCM resources. The SCM Assessment is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. As part of the SCM Assessment, thousands of historical geochemical samples from DGGS, U.S. Geological Survey (USGS), and U.S. Bureau of Mines archives are being reanalyzed by DGGS using modern, quantitative, geochemical-analytical methods. The objective is to update the statewide geochemical database to more clearly identify areas in Alaska with SCM potential.

How was the data set created?

  1. From what previous works were the data drawn?

    Granitto, Matthew and others, 2013 (source 1 of 1)
    Granitto, Matthew, Schmidt, J.M., Shew, N.B., Gamble, B.M., and Labay, K.A., 2013, Alaska Geochemical Database, Version 2.0 (AGDB2) --including "best value" data compilations for rock, sediment, soil, mineral, and concentrate sample media: Data Series DS 759, U.S. Geological Survey, United States.

    Online Links:

    Type_of_Source_Media: database
    Source_Contribution: location coordinates

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

    Date: 2014 (process 1 of 5)
    Location coordinates - Original locations were collected with NAD27 datum and Clarke 1866 spheroid prior to 2000, but some of the samples (after 2000) were collected in other projections. DGGS converted the coordinates for these samples to NAD27 datum and Clarke 1866 spheroid using appropriate transformations in ArcGIS; original location information is documented in Granitto and others (2013).

    Data sources used in this process:

    • Granitto, Matthew and others, 2013

    Date: 2014 (process 2 of 5)
    Sample preparation - Historical sediment samples were retrieved from the National Geochemical Sample Archive (NGSA) in Denver, Colorado, by USGS staff, then weighed, ground to -200 mesh and, where sufficient material was available, split into aliquots needed for analyses. Leftover material was re-archived at the NGSA. Sample splits were submitted to the USGS contract lab (SGS Minerals Services, Lakefield, Canada) for analysis.

    Date: 2014 (process 3 of 5)
    Method 20: Gold (Au), Platinum (Pt), and Palladium (Pd) - Gold, Pt, and Pd content were determined in geologic materials by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) after collection by fire assay. An assay ton (30 grams) was weighed into a crucible with 150 grams of flux and mixed. One mg of silver nitrate was added and covered with borax, and then placed in the furnace for 45 minutes at 1,080 degrees C. The melt was poured into a cast-iron mold, cooled, and hammered to free the lead button from the slag. The lead button was placed on a cupel and heated at 950 degrees C until all the lead was removed. The resulting dore bead was dissolved in a mixture of nitric acid and hydrochloric acid and heated in a water bath. The final solution was adjusted to 10 ml and introduced into the ICP-MS. The lower reporting limits are 1 ppb for Au and Pd, and 0.5 ppb for Pt. The upper limit for all elements is 10,000 ppb. Data were deemed acceptable if recovery of gold, platinum, and palladium was +/-20 percent at five times the lower limit of detection (LOD) and the calculated Relative Standard Deviation (RSD) of duplicate samples was no greater than 20 percent.

    Date: 2014 (process 4 of 5)
    Method 22: 55-Element ICP-AES-MS sodium peroxide sinter - Fifty-five major (except Si and Na), rare-earth, and trace elements were determined in geologic materials by inductively coupled plasma-atomic emission spectrometry (ICP-AES) and ICP-MS. The 0.10 g sample was decomposed using a sodium-peroxide sinter at 450 degrees C. The resultant cake was leached with water for a minimum of 4 hours, and acidified with nitric acid. After an addition of tartaric acid, aliquots of the digested sample were aspirated into the ICP-AES and the ICP-MS. The concentrations of the optimal elements from the ICP-AES and ICP-MS were determined. Calibration on the ICP-AES was performed by standardizing with digested rock reference materials and a series of multi-element solution standards. The ICP-MS was calibrated with aqueous standards, and internal standards were used to compensate for matrix effects and internal drifts. Reporting limits for the 55 elements are presented in the tables accompanying this report. Data were deemed acceptable if recovery for all 55 elements was +/-15 percent at five times the lower LOD and the calculated RSD of duplicate samples was no greater than 15 percent.

    Date: 2014 (process 5 of 5)
    Method 13: Tellurium (Te) - Tellurium content was determined by weighing 0.25 g of sample into a Teflon tube, adding a mixture of nitric, hydrofluoric, and perchloric acids and heating the sample. After the solution cooled, hydrochloric and nitric acids were added, and the sample was heated again, and then cooled. The samples were diluted and analyzed using hydride-generation atomic absorption spectrometry with an auto-analyzer and automated data collection system from Labtronics. The lower reporting limit for Te is 0.5 ppm and the upper detection limit is 1,000 ppm. Data for Te were deemed acceptable if recovery of that element was +/-20 percent at five times the lower LOD and the calculated RSD of duplicate samples was no greater than 20 percent.

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

    Bachmann, E.N., Blessington, M.J., Freeman, L.K., Newberry, R.J., Tuzzolino, A.L., Wright, T.C., and Wylie, William, 2013, Geochemical major-oxide, minor-oxide, trace-element, and rare-earth-element data from rocks and stream sediments collected in 2012 in the Ray Mountains area, Beaver, Bettles, Livengood, and Tanana quadrangles, Alaska: Raw Data File RDF 2013-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 4 p
    Blessington, M.J., Reioux, D.A., and Werdon, M.B., 2013, Analyses of historic U.S. Bureau of Mines rock and heavy mineral concentrate samples for geochemical trace-element and rare-earth element data--Ray Mountains and Kanuti-Hodzana uplands area, Alaska: Raw Data File RDF 2013-7, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 2 p
    Sicard, K.R., Wypych, Alicja, Twelker, Evan, Bachmann, E.N., Freeman, L.K., Newberry, R.J., Reioux, D.A., Tuzzolino, A.L., and Wright, T.C., 2014, Major-oxide, minor-oxide, and trace-element geochemical data from rocks in the Styx River area, Lime Hills C-1 Quadrangle, Lime Hills, McGrath, Talkeetna, and Tyonek quadrangles, Alaska: Raw Data File RDF 2014-6, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 4 p
    Stevens, D.S.P., Werdon, M.B., and Wright, T.C., 2013, Geochemical trace-element and rare-earth element data from rock samples collected in 2012 on Annette Island, southeast Alaska: Raw Data File RDF 2013-2, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 2 p
    Tuzzolino, A.L., Freeman, L.K., and Newberry, R.J., 2014, Geochemical major-oxide, minor-oxide, trace-element, and rare-earth-element data from rock samples collected in 2013 in the Ray Mountains area, Bettles A-1 and A-6 quadrangles, Alaska: Raw Data File RDF 2014-17, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 3 p
    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
    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., Gallagher, P.E., and Blessington, M.J., 2012, Geochemical, major-oxide, minor-oxide, trace-element, and rare-earth-element data from rock, stream sediment, and pan-concentrate samples collected in 2011 in the William Henry Bay area, Juneau C-4 and D-4 quadrangles, Southeast Alaska: Raw Data File RDF 2012-2, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 2 p
    Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Haines area, Juneau and Skagway quadrangles, southeast Alaska: Raw Data File RDF 2015-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 5 p
    Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Inmachuk, Kugruk, Kiwalik, and Koyuk River drainages, Granite Mountain, and the northern Darby Mountains, Bendeleben, Candle, Kotzebue, and Solomon quadrangles, Alaska: Raw Data File RDF 2015-4, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 5 p
    Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Kougarok area, Bendeleben and Teller quadrangles, Seward Peninsula, Alaska: Raw Data File RDF 2015-6, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 5 p
    Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Tonsina area, Valdez Quadrangle, Alaska: Raw Data File RDF 2015-8, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 5 p
    Werdon, M.B., Granitto, Matthew, and Azain, J.S., 2015, Geochemical reanalysis of historical U.S. Geological Survey sediment samples from the Zane Hills, Hughes and Shungnak quadrangles, Alaska: Raw Data File RDF 2015-9, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 5 p
    Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from Kook Lake, Sitka Quadrangle, Alaska: Raw Data File RDF 2014-15, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 4 p
    Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Darby Mountains, Seward Peninsula, Alaska: Raw Data File RDF 2014-9, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 4 p
    Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Porcupine River drainage, northeastern Alaska: Raw Data File RDF 2014-13, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 4 p
    Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Ray River watershed, and Kanuti and Hodzana rivers uplands, central Alaska: Raw Data File RDF 2014-12, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 4 p
    Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Selawik Hills, northwestern Alaska: Raw Data File RDF 2014-10, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 4 p
    Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the VABM Bend area, Charley River and Eagle quadrangles, east-central Alaska: Raw Data File RDF 2014-14, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 4 p
    Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Zane Hills pluton, northwestern Alaska: Raw Data File RDF 2014-11, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 4 p
    Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from tin occurrences associated with the Ohio Creek pluton, south-central Alaska: Raw Data File RDF 2014-8, 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?

    In the analytical-data table, field names (column headers) show the element and the units in which they are reported. Where a numerical suffix is shown, this element was analyzed by more than one method. In the detection-limits table and the metadata file, documentation is provided to explain each field name, as well as additional details such as lab name and method codes, analytical-method types and documentation, and the upper and lower detection limits for each of the elements and methods. For a few elements, the laboratory reported values that are either above the upper detection limit or below the lower detection limit; these values were kept in the data table. For each element, for each sample, the analytical-data table either contains assay values, or it contains coded-value place holders (that is, null or blank = not analyzed; -1 = the element's assay result is less than the lower detection limit for the method; -2 = the element's assay result is greater than the upper detection limit for the method; -3 = composition of this sample makes detection impossible by this method; interference problems; -4 = sample was submitted to the laboratory, but insufficient sample material was available to conduct an analysis).

  2. How accurate are the geographic locations?

    Location data for each sample are presented in latitude and longitude coordinates in decimal degrees with NAD27 datum and Clarke 1866 spheroid; resolution is variable, and ranges from 5-digit GPS precision to others with less precision. Original locations were collected with NAD27 datum and Clarke 1866 spheroid; original location information is documented in Granitto and others (2013).

  3. How accurate are the heights or depths?

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

    The sediment samples of interest were collected as part of several USGS and U.S. Department of Energy projects. Details of initial sample collection and analytical methods for these historical samples have been compiled into a single digital database, AGDB2 (Granitto and others, 2013). The original analyses for most of these samples were previously published, and the citations for the original results are included in the References and Original Data Sources section of the accompanying report. This publication provides results for all samples that were analyzed for this project.

  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 2015-7

  3. What legal disclaimers am I supposed to read?

    The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 30-Jun-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:

Generated by mp version 2.9.21 on Tue Jun 30 12:44:32 2015