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

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What does this data set describe?

Title:
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
Abstract:
Mineral-resources personnel from the Alaska Division of Geological & Geophysical Surveys conducted reconnaissance sampling of the William Henry Bay area in the Juneau C-4 and D-4 quadrangles, August 9-13, 2011. This sampling project was part of a statewide assessment of Alaska's potential for rare-earth element mineralization. During the William Henry Bay field project 46 rock, sediment, and heavy-mineral concentrate samples were collected for geochemical analysis (geochemical, major oxide, minor oxide, trace element, and rare earth elements).
Supplemental_Information:
The DGGS metadata standard extends the FGDC standard to include elements that are required to facilitate our internal data management. These elements, referred to as "layers," group and describe files that have intrinsic logical or topological relationships and correspond to subdirectories within the data distribution package. The metadata layer provides an FGDC metadata file and may include other documentation files. Attribute information for each data layer is described in this metadata file under the "Entity_and_Attribute_Information" section. Data layer contents: >border: Outline of the study area. >geochemical-data: Major- and minor-oxide, trace-element, and rare-earth-element analysis of pulverized rock, pan concentrate, and stream sediment samples
  1. How should this data set be cited?

    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.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -135.288500
    East_Bounding_Coordinate: -135.231200
    North_Bounding_Coordinate: 58.762100
    South_Bounding_Coordinate: 58.717200

  3. What does it look like?

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

    Calendar_Date: 2011
    Currentness_Reference: ground condition

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

    Geospatial_Data_Presentation_Form: report,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 0.000001. Longitudes are given to the nearest 0.000001. 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?

    rdf2012-2-border.shp
    Outline of the study area. (Source: Alaska Division of Geological & Geophysical Surveys)

    rdf2012-2-geochemical-data.csv, rdf2012-2-geochemical-data-limits.csv
    Major- and minor-oxide, trace-element, and rare-earth-element analysis of pulverized rock, pan concentrate, and stream sediment samples. (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. All samples were collected by M.B. Werdon.

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

    Range of values
    Minimum:-135.2885
    Maximum:-135.2312
    Units:decimal degrees

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

    Range of values
    Minimum:58.7172
    Maximum:58.7621
    Units:decimal degrees

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

    ValueDefinition
    NULLreceived sample weight was not provided by the lab

    Range of values
    Minimum:0.00849
    Maximum:0.0125
    Units:kilograms

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

    ValueDefinition
    NULLreceived sample weight was not provided by the lab

    The batch numbers assigned by the lab for these results are: A11-10924 and A12-01101

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

    ValueDefinition
    NULLreceived sample weight was not provided by the lab

    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.

    DESCRIP_3
    Extension of the sample or station description for descriptions which are greater than 508 characters in length (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NULLThe descriptive text is shorter than 508 characters.

    Characters greater than 508 of the sample or station description.

    DESCRIP_4
    Extension of the sample or station description for descriptions which are greater than 762 characters in length (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    NULLThe descriptive text is shorter than 762 characters.

    Characters greater than 762 of the sample or station description.

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

    The sample materials included in this analysis are: rock, pan concentrate, and stream sediment

    SiO2_pct
    Silicon dioxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:11.65
    Maximum:91.19
    Units:percent

    TiO2_pct
    Titanium dioxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.001 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:0.007
    Maximum:2.595
    Units:percent

    Al2O3_pct
    Aluminum oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:1.49
    Maximum:23.33
    Units:percent

    Fe2O3_pct
    Iron oxide (+3) values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:0.68
    Maximum:15.99
    Units:percent

    MnO_pct
    Manganese oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.001 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:0.035
    Maximum:0.362
    Units:percent

    MgO_pct
    Magnesium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:0.11
    Maximum:10.32
    Units:percent

    CaO_pct
    Calcium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:0.2
    Maximum:40.33
    Units:percent

    Na2O_pct
    Sodium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:0.03
    Maximum:6.72
    Units:percent

    K2O_pct
    Potassium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:0.03
    Maximum:10.61
    Units:percent

    P2O5_pct
    Phosphorus oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:0.01
    Maximum:1.36
    Units:percent

    LOI_pct
    Loss on Ignition values measured in percent (pct); Method: Gravimetric (GRAV); Lower detection limit = 0.01 pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:0.79
    Maximum:36.52
    Units:percent

    Total_pct
    Total values measured in percent (pct); Method: Calculation (Calculation); Lower detection limit = pct; Upper detection limit = pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. Note: the reported values may be slightly above or below 100% due to uncertainties in the measurements or calculation assumptions. (Source: Actlabs)

    Range of values
    Minimum:88.27
    Maximum:100.9
    Units:percent

    Au_g_tonne
    Gold values measured in grams per ton (gm/t); Method: Fire Assay - Gravimetric (FA-GRAV); Lower detection limit = 0.03 gm/t; Upper detection limit = gm/t; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

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

    Range of values
    Minimum:0.03
    Maximum:1.97
    Units:grams per ton

    Au_ppb
    Gold values measured in parts per billion (ppb); Method: Fire Assay - Instrumental Neutron Activation Analysis (FA-INAA); Lower detection limit = 1 ppb; Upper detection limit = ppb; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

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

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

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.6
    Maximum:3.8
    Units:parts per million

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

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:6
    Maximum:26
    Units:parts per million

    Ba_ppm
    Barium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 3 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:17
    Maximum:83430
    Units:parts per million

    Be_ppm
    Beryllium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:1
    Maximum:5
    Units:parts per million

    Bi_ppm
    Bismuth values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.4 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.4
    Maximum:5.1
    Units:parts per million

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

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:1
    Maximum:43
    Units:parts per million

    Cr_ppm
    Chromium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 20 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:20
    Maximum:350
    Units:parts per million

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

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.5
    Maximum:2.9
    Units:parts per million

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

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:10
    Maximum:170
    Units:parts per million

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

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

    Hf_ppm
    Hafnium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.2 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.3
    Maximum:8.6
    Units:parts per million

    In_ppm
    Indium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.2 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

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

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:2
    Maximum:11
    Units:parts per million

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

    ValueDefinition
    -1Below detection limit.

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

    Ni_ppm
    Nickel values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 20 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:20
    Maximum:90
    Units:parts per million

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

    ValueDefinition
    -1Below detection limit.

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

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

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:5
    Maximum:279
    Units:parts per million

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

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:3
    Maximum:182
    Units:parts per million

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

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.9
    Maximum:6.5
    Units:parts per million

    Sc_ppm
    Scandium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:1
    Maximum:45
    Units:parts per million

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

    ValueDefinition
    -1Below detection limit.

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

    Sr_ppm
    Strontium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 2 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:58
    Maximum:2583
    Units:parts per million

    Ta_ppm
    Tantalum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.1
    Maximum:3.2
    Units:parts per million

    Th_ppm
    Thorium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:0.1
    Maximum:47.5
    Units:parts per million

    Tl_ppm
    Thallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.1
    Maximum:2.3
    Units:parts per million

    U_ppm
    Uranium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.1
    Maximum:14.8
    Units:parts per million

    V_ppm
    Vanadium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 5 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:13
    Maximum:410
    Units:parts per million

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

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:1
    Maximum:4
    Units:parts per million

    Y_ppm
    Yttrium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 2 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:4
    Maximum:37
    Units:parts per million

    Zn_ppm
    Zinc values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 30 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:40
    Maximum:350
    Units:parts per million

    Zr_ppm
    Zirconium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 4 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:11
    Maximum:547
    Units:parts per million

    La_ppm
    Lanthanum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:0.4
    Maximum:187
    Units:parts per million

    Ce_ppm
    Cerium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:0.7
    Maximum:318
    Units:parts per million

    Pr_ppm
    Praseodymium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.05 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:0.07
    Maximum:29.4
    Units:parts per million

    Nd_ppm
    Neodymium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    Range of values
    Minimum:0.3
    Maximum:86.3
    Units:parts per million

    Sm_ppm
    Samarium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.1
    Maximum:14.8
    Units:parts per million

    Eu_ppm
    Europium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.05 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.1
    Maximum:3.95
    Units:parts per million

    Gd_ppm
    Gadolinium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.6
    Maximum:10.1
    Units:parts per million

    Tb_ppm
    Terbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.1
    Maximum:1.4
    Units:parts per million

    Dy_ppm
    Dysprosium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.1
    Maximum:7.3
    Units:parts per million

    Ho_ppm
    Holmium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.1
    Maximum:1.4
    Units:parts per million

    Er_ppm
    Erbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.1
    Maximum:3.9
    Units:parts per million

    Tm_ppm
    Thulium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.05 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.05
    Maximum:0.64
    Units:parts per million

    Yb_ppm
    Ytterbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.2
    Maximum:4.5
    Units:parts per million

    Lu_ppm
    Lutetium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.04 ppm; Upper detection limit = ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Actlabs)

    ValueDefinition
    -1Below detection limit.

    Range of values
    Minimum:0.05
    Maximum:0.77
    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?

    This project is part of the State's Rare Earth Elements and Strategic Minerals Assessment CIP funded by the Alaska State Legislature and managed by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys.

  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?

Fieldwork was performed to evaluate the mineral-resource potential of a block of State land near the mouth of William Henry Creek, and to investigate reported rare-earth-element, uranium, and thorium mineral occurrences on adjacent Tongass National Forest land. This fieldwork and sampling was conducted as part of the State's Rare Earth Element and Strategic Minerals Assessment project, which is designed to evaluate Alaska's potential for these resources.


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: 2011 (process 1 of 4)
    Sample collection - Rock, stream sediment, and heavy-mineral pan-concentrate samples were collected from outcrops, float fields, and stream beds in the William Henry Bay area. Rock samples were chosen and collected on the basis of potential for mineralization (as identified by visual inspection). Igneous rocks as well as rocks that exhibited veining or alteration were preferentially chosen for geochemical examination. Heavy mineral concentrates were isolated by hand-panning in the field.

    Date: 2011 (process 2 of 4)
    Sample preparation - All sample preparation for analysis was performed by Actlabs. Rocks intended for whole-rock analysis by Actlabs and those with a weathering rind were trimmed at DGGS with a tile saw prior to sample preparation at the laboratory. Rock samples were crushed to minus-10 mesh (1.7mm), mechanically split by riffling, and then pulverized to 95% minus-150 mesh (105 microns). A mild steel mill was used for pulverizing to minimize contamination of samples. Stream sediment and pan concentrate samples were dried at a temperature of 60C and then sieved to minus 80 mesh (177 microns). For Code-8 REE analysis, both rock and sediment samples were further pulverized to minus-200 mesh (0.074mm) using a mild-steel mill. Cleaning sand was used after every sample preparation to prevent contamination.

    Date: 2011 (process 3 of 4)
    Sample analysis - All samples were analyzed for major oxides, minor oxides and petrologic trace elements, as well as ore-related trace elements and rare earth elements. In addition to the internal quality-control program at Actlabs, DGGS monitored analysis quality by inserting igneous-rock and REE standards of known composition into the sample roster for every sample batch. The major oxide, minor oxide, petrographic trace-element, and ore-related trace-element analyses were conducted using inductively-coupled plasma - optical emission spectrometry (ICP - OES) and inductively-coupled plasma mass spectrometry (ICP-MS) following lithium metaborate/tetraborate fusion. Mass balance was used for the major-oxide and minor-oxide analyses as an additional quality control technique, requiring elemental totals of oxides to be between 98 and 101 percent. Gold assays were performed using gravimetric analysis following fire assay (FA-GRAV) on 29.16 grams of material. Separate splits of 4 samples were reanalyzed for gold using Instrumental Neutron Activation Analysis following fire assay (FA-INAA); grams of material analyzed is noted in the .csv file.

    Date: 2014 (process 4 of 4)
    Documentation revisions - We identified and corrected typographical errors in the description fields and in the file metadata. Data table headers were slightly modified to provide consistency with similar geochemical data releases.

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


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

  1. How well have the observations been checked?

    All geochemical, major-oxide, minor-oxide, trace-element, and rare-earth-element analyses were conducted by Actlabs. Analytical methods and detection limits are listed in attribute definitions. In addition to the internal quality-control program at Actlabs, DGGS monitored analysis quality by inserting igneous-rock and REE standards of known composition into the sample roster for every sample batch.

  2. How accurate are the geographic locations?

    Location data were downloaded from Garmin eTrex Legend HCx GPS units into a Microsoft 2007 Access database. Sample points were plotted into ArcGIS and visually examined to verify accuracy.

  3. How accurate are the heights or depths?

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

    This dataset contains all of the analysis for major-oxide, minor-oxide, trace-element, and rare-earth-element geochemistry complete at the time of publication for all samples collected in the William Henry Bay area during August 2011.

  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 2012-2

  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: 18-Aug-2014
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 Mon Aug 18 14:39:00 2014