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?
  1. How should this data set be cited?
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  5. What is the general form of this data set?
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What does this data set describe?

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:

   • <http://dx.doi.org/10.14509/23843>

   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)

   Value	Definition
   NULL	received 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)

   Value	Definition
   NULL	received 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)

   Value	Definition
   NULL	received 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)

   Value	Definition
   NULL	The 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)

   Value	Definition
   NULL	The 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)

   Value	Definition
   NULL	The 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)

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (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)

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)

   Value	Definition
   -1	Below 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)
   • Werdon, M.B.
   • Gallagher, P.E.
   • Blessington, M.J.

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 &amp; 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?
   • Availability in non-digital form:

     DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount.

   • Cost to order the data: Contact DGGS for current pricing

   • Availability in digital form:

     Data format:	ASCII tabular files
     Network links:	<http://dx.doi.org/10.14509/23843>

   • Cost to order the data: Free download

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:

• <http://www.dggs.alaska.gov/metadata/dggs.ext>