Stream-Sediment Samples Reanalyzed for Major, Rare Earth, and Trace Elements from Ten 1:250,000-Scale Quadrangles, south-central Alaska, 2007-08

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Title:
Stream-Sediment Samples Reanalyzed for Major, Rare Earth, and Trace Elements from Ten 1:250,000-Scale Quadrangles, south-central Alaska, 2007-08
Abstract:
During the 1960s through the 1980s, the U.S. Geological Survey (USGS) conducted reconnaissance geochemical surveys of the drainage basins throughout most of the Anchorage, Bering Glacier, Big Delta, Gulkana, Healy, McCarthy, Mount Hayes, Nabesna, Talkeetna Mountains, and Valdez 1:250,000-scale quadrangles in Alaska as part of the Alaska Mineral Resource Assessment Program (AMRAP). These geochemical surveys provide data necessary to assess the potential for undiscovered mineral resources on public and other lands, and provide data that may be used to determine regional-scale element baselines. This report provides new data for 366 of the previously collected stream-sediment samples. These samples were selected for reanalysis because recently developed analytical methods can detect additional elements of interest and have lower detection limits than the methods used when these samples were originally analyzed. These samples were all analyzed for arsenic by hydride generation atomic absorption spectrometry (HGAAS), for gold, palladium, and platinum by inductively coupled plasma-mass spectrometry after lead button fire assay separation (FA/ICP-MS), and for a suite of 55 major, rare earth, and trace elements by inductively coupled plasma-atomic emission spectrometry and inductively coupled plasma-mass spectrometry (ICP-AES-MS) after sodium peroxide sinter at 450 degrees Celsius.
  1. How should this data set be cited?

    Bailey, Elizabeth A., Shew, Nora B., Labay, Keith A., Schmidt, Jeanine M., O'Leary, Richard M., and Detra, David E., 2010, Stream-Sediment Samples Reanalyzed for Major, Rare Earth, and Trace Elements from Ten 1:250,000-Scale Quadrangles, south-central Alaska, 2007-08: U.S. Geological Survey Open-File Report 2010-1147, U.S. Geological Survey, Reston, VA.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -150.00000
    East_Bounding_Coordinate: -141.0000
    North_Bounding_Coordinate: 64.5000
    South_Bounding_Coordinate: 60.7000

  3. What does it look like?

    <http://pubs.usgs.gov/of/2010/1147/fig1.pdf> (PDF (Portable Document Format))
    Map showing location of 366 stream-sediment samples reanalyzed by the U.S. Geological Survey in the Anchorage, Bering Glacier, Big Delta, Gulkana, Healy, McCarthy, Mount Hayes, Nabesna, Talkeetna Mountains, and Valdez 1:250,000-scale quadrangles, Alaska

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

    Beginning_Date: 2007
    Ending_Date: 2008
    Currentness_Reference: years in which samples were analyzed

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

    Geospatial_Data_Presentation_Form: tabular 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. It contains the following vector data types (SDTS terminology):

      • Entity point

    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 0.001 degrees. Longitudes are given to the nearest 0.001 degrees. Latitude and longitude values are specified in Decimal degrees.

      The horizontal datum used is North American Datum of 1927 (NAD27).
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.

  7. How does the data set describe geographic features?

    table2.xls
    This table contains analytical data for 366 stream-sediment samples. The fields (columns) consist of sample identification, location, and analytical information for each sample. (Source: U.S. Geological Survey)

    Map No.
    Unique identification number assigned by the authors to make reading the location figure easier. These numbers correspond to the sample location labels shown on plate1.pdf. (Source: U.S. Geological Survey, Nora B. Shew, Anchorage, AK - coauthor)

    Range of values
    Minimum:1
    Maximum:366

    New Lab No.
    Each sample submitted for analyses is assigned a unique ID number by the USGS that is integrated with the USGS laboratory information storage system (LIMS) prior to submitting to a laboratory. (Source: U.S. Geological Survey, Richard M. O'Leary, Denver, CO)

    Alphanumeric data without scientific significance. Each value is assigned by the USGS/LIMS at the time of submittal and is unique.

    Field_No.
    Field number assigned by the submitter. (Source: U.S. Geological Survey)

    Alphanumeric data without scientific significance. Each value assigned by the submitter is unique.

    Previous Job No.
    Assigned by the USGS. Samples are submitted by the USGS to a laboratory in jobs (groups) of samples. Each group of samples submitted for analyses is assigned a unique job number. (Source: U.S. Geological Survey, Richard M. O'Leary, Denver, CO)

    Alphanumeric data without scientific significance. Each value assigned by the USGS prior to submitting to a laboratory is unique to the group of samples submitted together. These values were assigned when the samples were originally submitted for preparation and analyses. The scheme used for Job No. has varied with time; some values are numeric and some values are combinations of letters and numbers.

    Latitude
    North latitude of sample site reported in decimal degrees. (NAD27, Clarke 1866) (Source: U.S. Geological Survey)

    Range of values
    Minimum:60.734
    Maximum:64.249
    Units:decimal degrees

    Longitude
    West longitude of sample site reported in negative decimal degrees. (NAD27, Clarke 1866) (Source: U.S. Geological Survey)

    Range of values
    Minimum:-149.988
    Maximum:-141.025
    Units:decimal degrees

    1:250,000-scale quadrangle
    Name of the 1:250,000-scale quadrangle in which the sample was collected. (Source: U.S. Geological Survey)

    ValueDefinition
    Anchorage 
    Bering Glacier 
    Big Delta 
    Gulkana 
    Healy 
    McCarthy 
    Mount Hayes 
    Nabesna 
    Talkeetna Mountains 
    Valdez 

    HGAAS As_ppm
    Concentration of arsenic in stream-sediment samples; determined by hydride generation atomic absorption spectrometry (HGAAS) (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#M9>)

    Range of values
    Minimum:0.6
    Maximum:849
    Units:ppm (parts per million)

    FA/ICP_MS Au_ppb
    Concentration of gold in stream-sediment samples; determined by fire assay with inductively coupled plasma_mass spectrometry finish (FA/ICP-MS) (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m20>)

    ValueDefinition
    <1below the lower limit of detection (1 ppb)
    insinsufficient sample material for analysis

    Range of values
    Minimum:1
    Maximum:1,780
    Units:ppb (parts per billion)

    FA/ICP_MS Pd_ppb
    Concentration of palladium in stream-sediment samples; determined by fire assay with inductively coupled plasma_mass spectrometry finish (FA/ICP-MS) (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m20>)

    ValueDefinition
    <1below the lower limit of detection (1 ppb)
    insinsufficient sample material for analysis

    Range of values
    Minimum:1
    Maximum:17
    Units:ppb (parts per billion)

    FA/ICP_MS Pt_ppb
    Concentration of platinum in stream-sediment samples; determined by fire assay with inductively coupled plasma_mass spectrometry finish (FA/ICP-MS) (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m20>)

    ValueDefinition
    <0.5below the lower limit of detection (0.5 ppb)
    insinsufficient sample material for analysis

    Range of values
    Minimum:0.5
    Maximum:11.1
    Units:ppb (parts per billion)

    ICPAES_MS55 Al_%
    Concentration of aluminum in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:1.40
    Maximum:10.8
    Units:% (percent)

    ICPAES_MS55 Ca_%
    Concentration of calcium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, Survey, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.13
    Maximum:25.1
    Units:% (percent)

    ICPAES_MS55 Fe_%
    Concentration of iron in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.94
    Maximum:12.4
    Units:% (percent)

    ICPAES_MS55 K_%
    Concentration of potassium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.04
    Maximum:3.49
    Units:% (percent)

    ICPAES_MS55 Mg_%
    Concentration of magnesium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.08
    Maximum:6.31
    Units:% (percent)

    ICPAES_MS55 Mn_%
    Concentration of manganese in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.01
    Maximum:0.45
    Units:% (percent)

    ICPAES_MS55 P_%
    Concentration of phosphorus in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.02
    Maximum:0.32
    Units:% (percent)

    ICPAES_MS55 Ti_%
    Concentration of titanium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.07
    Maximum:3.93
    Units:% (percent)

    ICPAES_MS55 Ag_ppm
    Concentration of silver in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <1below the lower limit of detection (1 ppm)

    Range of values
    Minimum:1
    Maximum:10
    Units:ppm (parts per million)

    ICPAES_MS55 As_ppm
    Concentration of arsenic in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <30below the lower limit of detection (30 ppm)
    insinsufficient sample material for analysis

    Range of values
    Minimum:30
    Maximum:850
    Units:ppm (parts per million)

    ICPAES_MS55 Ba_ppm
    Concentration of barium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:33
    Maximum:4,480
    Units:ppm (parts per million)

    ICPAES_MS55 Be_ppm
    Concentration of beryllium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <5below the lower limit of detection (5 ppm)

    Range of values
    Minimum:5
    Maximum:13
    Units:ppm (parts per million)

    ICPAES_MS55 Bi_ppm
    Concentration of bismuth in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <0.1below the lower limit of detection (0.1 ppm)

    Range of values
    Minimum:0.1
    Maximum:1.1
    Units:ppm (parts per million)

    ICPAES_MS55 Cd_ppm
    Concentration of cadmium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <0.2below the lower limit of detection (0.2 ppm)

    Range of values
    Minimum:0.2
    Maximum:50.9
    Units:ppm (parts per million)

    ICPAES_MS55 Ce_ppm
    Concentration of cerium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:3.4
    Maximum:380
    Units:ppm (parts per million)

    ICPAES_MS55 Co_ppm
    Concentration of cobalt in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.6
    Maximum:51.5
    Units:ppm (parts per million)

    ICPAES_MS55 Cr_ppm
    Concentration of chromium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:10
    Maximum:3,070
    Units:ppm (parts per million)

    ICPAES_MS55 Cs_ppm
    Concentration of cesium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.1
    Maximum:11.4
    Units:ppm (parts per million)

    ICPAES_MS55 Cu_ppm
    Concentration of copper in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:5
    Maximum:216
    Units:ppm (parts per million)

    ICPAES_MS55 Dy_ppm
    Concentration of dysprosium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:1.29
    Maximum:15.8
    Units:ppm (parts per million)

    ICPAES_MS55 Er_ppm
    Concentration of erbium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.81
    Maximum:10.5
    Units:ppm (parts per million)

    ICPAES_MS55 Eu_ppm
    Concentration of europium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.36
    Maximum:2.46
    Units:ppm (parts per million)

    ICPAES_MS55 Ga_ppm
    Concentration of gallium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:4
    Maximum:26
    Units:ppm (parts per million)

    ICPAES_MS55 Gd_ppm
    Concentration of gadollinium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:1.00
    Maximum:20.4
    Units:ppm (parts per million)

    ICPAES_MS55 Ge_ppm
    Concentration of germanium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <0.2below the lower limit of detection (0.2 ppm)

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

    ICPAES_MS55 Hf_ppm
    Concentration of hafnium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <1below the lower limit of detection (1 ppm)

    Range of values
    Minimum:1
    Maximum:46
    Units:ppm (parts per million)

    ICPAES_MS55 Ho_ppm
    Concentration of holmium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.26
    Maximum:3.20
    Units:ppm (parts per million)

    ICPAES_MS55 In_ppm
    Concentration of indium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <0.2below the lower limit of detection (0.2 ppm)

    Range of values
    Minimum:0.3
    Maximum:0.3
    Units:ppm (parts per million)

    ICPAES_MS55 La_ppm
    Concentration of lanthanum in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:1.4
    Maximum:186
    Units:ppm (parts per million)

    ICPAES_MS55 Li_ppm
    Concentration of lithium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <10below the lower limit of detection (10 ppm)

    Range of values
    Minimum:10
    Maximum:80
    Units:ppm (parts per million)

    ICPAES_MS55 Lu_ppm
    Concentration of lutetium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.10
    Maximum:1.37
    Units:ppm (parts per million)

    ICPAES_MS55 Mo_ppm
    Concentration of molybdenum in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <2below the lower limit of detection (2 ppm)

    Range of values
    Minimum:2
    Maximum:15
    Units:ppm (parts per million)

    ICPAES_MS55 Nb_ppm
    Concentration of niobium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:1
    Maximum:58
    Units:ppm (parts per million)

    ICPAES_MS55 Nd_ppm
    Concentration of neodymium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:2.5
    Maximum:161
    Units:ppm (parts per million)

    ICPAES_MS55 Ni_ppm
    Concentration of nickel in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <5below the lower limit of detection (5 ppm)

    Range of values
    Minimum:5
    Maximum:421
    Units:ppm (parts per million)

    ICPAES_MS55 Pb_ppm
    Concentration of lead in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <5below the lower limit of detection (5 ppm)

    Range of values
    Minimum:5
    Maximum:520
    Units:ppm (parts per million)

    ICPAES_MS55 Pr_ppm
    Concentration of praeseodymium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.48
    Maximum:42.4
    Units:ppm (parts per million)

    ICPAES_MS55 Rb_ppm
    Concentration of rubidium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.7
    Maximum:170
    Units:ppm (parts per million)

    ICPAES_MS55 Sb_ppm
    Concentration of anitmony in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <0.1below the lower limit of detection (0.1 ppm)

    Range of values
    Minimum:0.1
    Maximum:21.2
    Units:ppm (parts per million)

    ICPAES_MS55 Sc_ppm
    Concentration of scandium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <5below the lower limit of detection (5 ppm)

    Range of values
    Minimum:5
    Maximum:47
    Units:ppm (parts per million)

    ICPAES_MS55 Sm_ppm
    Concentration of samarium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.8
    Maximum:29.6
    Units:ppm (parts per million)

    ICPAES_MS55 Sn_ppm
    Concentration of tin in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <1below the lower limit of detection (1 ppm)

    Range of values
    Minimum:1
    Maximum:76
    Units:ppm (parts per million)

    ICPAES_MS55 Sr_ppm
    Concentration of strontium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:38
    Maximum:923
    Units:ppm (parts per million)

    ICPAES_MS55 Ta_ppm
    Concentration of tantalum in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <0.5below the lower limit of detection (0.5 ppm)

    Range of values
    Minimum:0.5
    Maximum:3.5
    Units:ppm (parts per million)

    ICPAES_MS55 Tb_ppm
    Concentration of terbium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.18
    Maximum:3.18
    Units:ppm (parts per million)

    ICPAES_MS55 Th_ppm
    Concentration of thorium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.3
    Maximum:160
    Units:ppm (parts per million)

    ICPAES_MS55 Tl_ppm
    Concentration of thallium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <0.5below the lower limit of detection (0.5 ppm)

    Range of values
    Minimum:0.5
    Maximum:2.8
    Units:ppm (parts per million)

    ICPAES_MS55 Tm_ppm
    Concentration of thulium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.11
    Maximum:1.55
    Units:ppm (parts per million)

    ICPAES_MS55 U_ppm
    Concentration of uranium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.08
    Maximum:47.7
    Units:ppm (parts per million)

    ICPAES_MS55 V_ppm
    Concentration of vanadium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:24
    Maximum:455
    Units:ppm (parts per million)

    ICPAES_MS55 W_ppm
    Concentration of tungsten in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    ValueDefinition
    <1below the lower limit of detection (1 ppm)

    Range of values
    Minimum:1
    Maximum:102
    Units:ppm (parts per million)

    ICPAES_MS55 Y_ppm
    Concentration of yttrium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:6.8
    Maximum:89.7
    Units:ppm (parts per million)

    ICPAES_MS55 Yb_ppm
    Concentration of ytterbium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:0.7
    Maximum:9.9
    Units:ppm (parts per million)

    ICPAES_MS55 Zn_ppm
    Concentration of zinc in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:17
    Maximum:2,100
    Units:ppm (parts per million)

    ICPAES_MS55 Zr_ppm
    Concentration of zirconium in stream-sediment samples; determined by inductively coupled plasma atomic emission spectrometry or mass spectrometry (ICP-AES-MS) following sodium peroxide sinter at 450 degrees Celsius (Source: U.S. Geological Survey, Central Mineral and Environmental Resources Science Center (CMERSC) Analytical Chemistry, David E. Detra, Denver, CO and <http://minerals.cr.usgs.gov/projects/analytical_chem/references.html#m22>)

    Range of values
    Minimum:8
    Maximum:1,810
    Units:ppm (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?

    Matthew Granitto: USGS, Denver, CO, USGS National Geochemical Database (NGDB) organization and maintenance

    Steven M. Smith: USGS, Denver, CO, USGS NGDB project leader

    David E. Detra: USGS Denver, CO, Analytical chemistry methods information, analytical data quality assurance and control, contract chemistry manager

    Richard M. O'Leary: USGS Denver, CO, Analytical chemistry methods information, analytical data quality assurance and control, sample preparation oversight

    Timothy Brabets: USGS Anchorage, AK, technical reviewer

    Bruce M. Gamble: USGS Anchorage, AK, technical reviewer

    Theresa Taylor: USGS Anchorage, AK, metadata reviewer

    Evan Thoms: USGS Anchorage, AK, metadata reviewer

  3. To whom should users address questions about the data?

    Bailey, Elizabeth A.
    U.S. Geological Survey, Alaska Science Center
    Research Chemist
    4210 University Drive
    Anchorage, Alaska 99508-4626
    United States of America

    1-907-786-7442 (voice)
    1-907-786-7401 (FAX)
    <eabailey@usgs.gov>

Why was the data set created?

These data may be helpful to locate areas of potential interest for ore minerals, to provide data that may be used to determine regional-scale element baselines, and to provide data for USGS mineral resource assessment studies.

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: 05-Feb-2010 (process 1 of 1)
    Three hundred sixty six stream-sediment samples that were previously collected collected in west-central Alaska by several USGS scientists were retrieved from the USGS sample storage archive in Building 810 at the Denver Federal Center and chemically analyzed. All samples were analyzed for As by hydride generation atomic absorption spectrometry (HGAAS), for Au, Pd, and Pt by inductively coupled plasma-mass spectrometry after fire assay separation (FA/ICP_MS), and for a suite of 55 major, rare earth, and trace elements by inductively coupled plasma-atomic emission spectrometry and inductively coupled plasma-mass spectrometry (ICP-AES-MS).

    2. Location and analytical data were compiled in spreadsheet form (table2.xls). Columns (fields) containing numeric data such as latitude, longitude, and analytical data were formatted as numeric fields and saved.

  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?

    The analytical methods used to generate the data in this report were selected by the authors. The accuracy of the data varies with the analytical methodology and with the concentration of the element being analyzed. Please see USGS Open-File Report 02-0223 (<http://pubs.usgs.gov/of/2002/ofr-02-0223/>) and the USGS Mineral Resources Program Contract Laboratory Method Summaries web site (<http://minerals.cr.usgs.gov/projects/analytical_chem/references.html>) for specific details on the sample preparation and analytical methods used for this report.

  2. How accurate are the geographic locations?

    Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitude and longitude values are specified in decimal degrees. The original sample location data were recorded in a variety of formats (decimal degrees, degrees plus decimal minutes, degrees-minutes-seconds). Most of the coordinates were originally determined in the field using clear mylar graticules overlaid on a paper 1:63,360-scale topographic base maps in degrees, minutes, and seconds or in the office using a tablet digitizer. When submitters reported locations as degrees, minutes, and seconds of latitude and longitude the accuracy should be within a few seconds or about 200 feet.
    The horizontal datum used is North American Datum of 1927 The ellipsoid used is Clarke 1866

  3. How accurate are the heights or depths?

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

    Samples to be reanalyzed were randomly selected from 10 x 10 km (6.2 x 6.2 mi) grid cells that we overlaid on the study area to ensure a relatively even sample distribution. When available, two samples were selected from each cell. Archived material sufficient for re-analysis was not available for all samples initially selected. When possible, new selections were made in an attempt to continue to have two samples from each cell.

    The selected samples were reanalyzed to determine if the original analyses are adequate for regional-scale mineral resource assessment, if the original data are adequate to determine regional-scale baselines for elements of interest, and to incorporate additional analyses such as platinum and palladium and rare earth elements (REE). Original analyses, many of which are by semiquantitative methods, may be found in the Rock Analysis and Storage System (RASS) component of the National Geochemical Database (NGDB), but are not included in this dataset.

    The geographic extent of this area includes the Anchorage, Bering Glacier, Big Delta, Gulkana, Healy, McCarthy, Mount Hayes, Nabesna, Talkeetna Mountains, and Valdez 1:250,000-scale quadrangles in Alaska. All of the 366 samples retrieved from the Building 810 archive at the Denver Federal Center for this report were reanalyzed for As by hydride generation atomic absorption spectrometry (HGAAS), and for a suite of 55 major, rare earth, and trace elements by inductively coupled plasma-atomic emission spectrometry and inductively coupled plasma-mass spectrometry (ICP-AES-MS). Most of these samples were also reanalyzed for Au, Pd, and Pt by inductively coupled plasma-mass spectrometry after fire assay separation (FA/ICP_MS) however 16 samples did not contain enough material (30 g.) to be analyzed. These are noted in the data table with "ins" in the fields (columns) for Au, Pd, and Pt.

    All sample analyses were completed in 2007-2008 at a laboratory under contract to the USGS. Contract laboratory oversight, data entry into the USGS National Geochemical Database, and analytical data QA/QC are managed by David E. Detra, David L. Fey, and Richard M. O'Leary at the USGS in Denver, CO.

    This report consists of 3 files. The first PDF file (OFR2010-1147.pdf) contains introductory and explanatory text and a table with the upper and lower reporting limits for each element analyzed by the various analytical methods used for this data set.

    The second file is a PDF (fig1.pdf) image showing the location of the 366 stream-sediment samples reanalyzed for this report.

    The third file contains the sample identification, location, and analytical data for each sample reported in MSExcel spreadsheet (table2.xls).

    Abreviations used in the downloadable data table (table2.xls):
    HGAAS: hydride genration atomic absorption spectrometry

    FA/ICP_MS: fire assay with inductively coupled plasma-mass spectrometry finish

    ICPAES_MS55: inductively coupled plasma-atomic emission spectrometry or inductively coupled plasma-mass spectrometry

    ppb: parts per billion

    ppm: parts per million

    %: percent

    <: less than the indicated lower limit of detection for the element as determined by the analytical method used

    ins: insufficient sample for analysis

  5. How consistent are the relationships among the observations, including topology?

    All of the location coordinate and analytical data fields have been formatted as numeric fields. Maximum and minimum values were calculated to insure that valid results were reported for each analytical value; that is all values are greater than zero (0) and not less than the element lower reporting limit for each analytical method. Latitude/Longitude coordinates were checked to insure they plotted in the correct 1:250,000-scale quadrangle.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None
Use_Constraints: None

  1. Who distributes the data set? (Distributor 1 of 1)

    USGS Information Services
    Box 25286, Denver Federal Center
    Denver, CO 80225-0046
    United States

    1-888-ASK-USGS (1-888-275-8747) (voice) (voice)
    1-303-202-4695 (FAX) (FAX)
    infoservices@usgs.gov

  2. What's the catalog number I need to order this data set?

    USGS Open-File Report 2010-1147

  3. What legal disclaimers am I supposed to read?

    The USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. The USGS further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although this data has been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of this data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the USGS have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by the USGS

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 25-Jun-2010
Last Reviewed: 05-Feb-2010
Metadata author:
Bailey, Elizabeth A.
U.S. Geological Survey, Alaska Science Center
Research Chemist
4210 University Drive
Anchorage, Alaska 99508-4626
United States

1-907-786-7442 (voice)
1-907-786-7401 (FAX)
eabailey@usgs.gov

Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

Generated by mp version 2.9.8 on Thu Aug 19 13:16:27 2010