Geochemical trace-element and rare-earth element data from rock samples collected in 2012 on Annette Island, southeast Alaska

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What does this data set describe?

1. How should this data set be cited?

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

   Online Links:

   • <http://dx.doi.org/10.14509/24975>

   Other_Citation_Details: 2 p.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -131.5801

   East_Bounding_Coordinate: -131.5517

   North_Bounding_Coordinate: 55.1778

   South_Bounding_Coordinate: 55.0864

3. What does it look like?

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

   Beginning_Date: 2012

   Ending_Date: 2013

   Currentness_Reference: ground condition

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

   Geospatial_Data_Presentation_Form: document, digital data download

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?

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

7. How does the data set describe geographic features?

   rdf2013-2-rock-trace-element-ree.csv, rdf2013-2-rock-trace-element-ree-limits.csv

   This data distribution package consists of two CSV files which provide sample locations and descriptions, geochemical data, analytical methods, and instrumentation detection limits for trace element and rare earth element analysis of rock samples. The primary table, rdf2013-2-rock-trace-element-ree.csv presents the analytical results and sample locations. A secondary table, rdf2013-2-rock-trace-element-ree-limits.csv provides detailed information about the methods and detection limits of the instrumentation used to analyze this data. Attribute information for the primary table is provided below. (Source: Alaska Division of Geological & Geophysical Surveys)

   Sample

   Label assigned to identify the sample (Source: Alaska Division of Geological & Geophysical Surveys)

   Sample identifiers were assigned by students of Mr. Rob Erbelding and Mr. Jason Pipkin.

   Description

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

   Samples were derived from outcrops of mafic-ultramafic rocks and from one chalcopyrite-bearing quartz vein.

   Latitude

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

   Range of values
   Minimum:	55.0864
   Maximum:	55.1778
   Units:	decimal degrees

   Longitude

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

   Range of values
   Minimum:	-131.5801
   Maximum:	-131.5517
   Units:	decimal degrees

   Weight_kg

   Sample weight in kilograms (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex)

   Range of values
   Minimum:	0.14
   Maximum:	1.67
   Units:	kilograms

   Ba_ppm_1

   Barium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Range of values
   Minimum:	0.5
   Maximum:	68.1
   Units:	parts per million

   Ce_ppm

   Cerium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.5
   Maximum:	11.4
   Units:	parts per million

   Cr_ppm_1

   Chromium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 10 ppm; Upper detection limit = 10 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -2	Above detection limit.

   Range of values
   Minimum:	30
   Maximum:	6280
   Units:	parts per million

   Cs_ppm

   Cesium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.01 ppm; Upper detection limit = 0.01 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	0.14
   Units:	parts per million

   Dy_ppm

   Dysprosium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.05 ppm; Upper detection limit = 0.05 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.05
   Maximum:	1.14
   Units:	parts per million

   Er_ppm

   Erbium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.03 ppm; Upper detection limit = 0.03 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.03
   Maximum:	0.67
   Units:	parts per million

   Eu_ppm

   Europium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.03 ppm; Upper detection limit = 0.03 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.03
   Maximum:	0.53
   Units:	parts per million

   Ga_ppm_1

   Gallium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.1 ppm; Upper detection limit = 0.1 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Range of values
   Minimum:	0.4
   Maximum:	4.4
   Units:	parts per million

   Gd_ppm

   Gadolinium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.05 ppm; Upper detection limit = 0.05 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.05
   Maximum:	1.58
   Units:	parts per million

   Hf_ppm

   Hafnium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.2 ppm; Upper detection limit = 0.2 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.2
   Maximum:	1.2
   Units:	parts per million

   Ho_ppm

   Holmium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.01 ppm; Upper detection limit = 0.01 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	0.21
   Units:	parts per million

   La_ppm_1

   Lanthanum values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.5 ppm; Upper detection limit = 0.5 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.6
   Maximum:	2.9
   Units:	parts per million

   Lu_ppm

   Lutetium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.01 ppm; Upper detection limit = 0.01 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	0.08
   Units:	parts per million

   Nb_ppm

   Niobium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.2
   Maximum:	5.1
   Units:	parts per million

   Nd_ppm

   Neodymium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.1
   Maximum:	6
   Units:	parts per million

   Pr_ppm

   Praseodymium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.03 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.03
   Maximum:	1.38
   Units:	parts per million

   Rb_ppm

   Rubidium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.2
   Maximum:	9.2
   Units:	parts per million

   Sm_ppm

   Samarium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.03 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.03
   Maximum:	1.31
   Units:	parts per million

   Sn_ppm

   Tin values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

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

   Sr_ppm_1

   Strontium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Range of values
   Minimum:	1.4
   Maximum:	55.6
   Units:	parts per million

   Ta_ppm

   Tantalum values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

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

   Tb_ppm

   Terbium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.01 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	0.2
   Units:	parts per million

   Th_ppm_1

   Thorium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.05 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.05
   Maximum:	0.4
   Units:	parts per million

   Tl_ppm_1

   Thallium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.5 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Tm_ppm

   Thulium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.01 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	0.09
   Units:	parts per million

   U_ppm_1

   Uranium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.05 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.05
   Maximum:	0.45
   Units:	parts per million

   V_ppm_1

   Vanadium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	35
   Maximum:	103
   Units:	parts per million

   W_ppm_1

   Tungsten values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

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

   Y_ppm

   Yttrium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.8
   Maximum:	6.7
   Units:	parts per million

   Yb_ppm

   Ytterbium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 0.03 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.03
   Maximum:	0.54
   Units:	parts per million

   Zr_ppm

   Zirconium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium metaborate fusion - HNO3-HCl dissolution ; Lower detection limit = 2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	20
   Maximum:	50
   Units:	parts per million

   Ag_ppm

   Silver values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.5 ppm; Upper detection limit = 100 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.5
   Maximum:	0.8
   Units:	parts per million

   Al_pct

   Aluminum values measured in percent (pct); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 50 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Range of values
   Minimum:	0.03
   Maximum:	1.52
   Units:	percent

   As_ppm

   Arsenic values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

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

   Ba_ppm_2

   Barium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

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

   Be_ppm

   Beryllium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.5 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

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

   Bi_ppm

   Bismuth values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

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

   Ca_pct

   Calcium values measured in percent (pct); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 50 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Range of values
   Minimum:	0.03
   Maximum:	10.9
   Units:	percent

   Cd_ppm

   Cadmium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.5 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Co_ppm

   Cobalt values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Range of values
   Minimum:	7
   Maximum:	147
   Units:	parts per million

   Cr_ppm_2

   Chromium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -2	Above detection limit.

   Range of values
   Minimum:	33
   Maximum:	3200
   Units:	parts per million

   Cu_ppm

   Copper values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -2	Above detection limit.

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

   Fe_pct

   Iron values measured in percent (pct); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 50 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Range of values
   Minimum:	4.17
   Maximum:	11.25
   Units:	percent

   Ga_ppm_2

   Gallium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

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

   K_pct

   Potassium values measured in percent (pct); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 10 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	0.63
   Units:	percent

   La_ppm_2

   Lanthanum values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Mg_pct

   Magnesium values measured in percent (pct); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 50 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Range of values
   Minimum:	0.31
   Maximum:	26.2
   Units:	percent

   Mn_ppm

   Manganese values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Range of values
   Minimum:	217
   Maximum:	1470
   Units:	parts per million

   Mo_ppm

   Molybdenum values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	1
   Maximum:	12
   Units:	parts per million

   Na_pct

   Sodium values measured in percent (pct); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 10 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	0.21
   Units:	percent

   Ni_ppm

   Nickel values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Range of values
   Minimum:	9
   Maximum:	1890
   Units:	parts per million

   P_ppm

   Phosphorus values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	10
   Maximum:	820
   Units:	parts per million

   Pb_ppm

   Lead values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

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

   S_pct

   Sulfur values measured in percent (pct); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 10 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	2.47
   Units:	percent

   Sb_ppm

   Antimony values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Sc_ppm

   Scandium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Range of values
   Minimum:	3
   Maximum:	85
   Units:	parts per million

   Sr_ppm_2

   Strontium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Range of values
   Minimum:	1
   Maximum:	55
   Units:	parts per million

   Th_ppm_2

   Thorium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 20 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Ti_pct

   Titanium values measured in percent (pct); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 0.01 pct; Upper detection limit = 10 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	0.18
   Units:	percent

   Tl_ppm_2

   Thallium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	10
   Maximum:	20
   Units:	parts per million

   U_ppm_2

   Uranium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

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

   V_ppm_2

   Vanadium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Range of values
   Minimum:	3
   Maximum:	110
   Units:	parts per million

   W_ppm_2

   Tungsten values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Zn_ppm

   Zinc values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HF-HNO3-HClO4-HCl; Lower detection limit = 2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Range of values
   Minimum:	17
   Maximum:	114
   Units:	parts per million

   Cu_pct

   Copper values measured in percent (pct); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3-HClO4-HF+HCl; Lower detection limit = 0.001 pct; Upper detection limit = 40 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   null or blank	Chemical species not requested or not analyzed

   Range of values
   Minimum:	2.83
   Maximum:	2.83
   Units:	percent

   Au_ppm

   Gold values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Fire assay - aqua regia; Lower detection limit = 0.01 ppm; Upper detection limit = 10 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Range of values
   Minimum:	0.002
   Maximum:	0.155
   Units:	parts per million

   Pt_ppm

   Platinum values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Fire assay - aqua regia; Lower detection limit = 0.005 ppm; Upper detection limit = 10 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.005
   Maximum:	0.079
   Units:	parts per million

   Pd_ppm

   Palladium values measured in parts per million (ppm); Method and digestion: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Fire assay - aqua regia; Lower detection limit = 0.001 ppm; Upper detection limit = 10 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Chemex.)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.001
   Maximum:	0.123
   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)
   • Stevens, D.S.P.
   • Werdon, M.B.
   • Wright, T.C.

2. Who also contributed to the data set?

   The DGGS would like to thank the Metlakatla Indian Community for permission to collect samples and publish the associated geochemical assays. Analyses were paid for by the State of Alaska's Strategic and Critical Minerals Assessment CIP, which is funded by the Alaska State Legislature and managed by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. Funding for DGGS travel and field time was provided by the MapTEACH program, funded by the U.S. Department of Education, Alaska Native Education Program (Award Number S356A090040).

3. To whom should users address questions about the data?
   Alaska Division of Geological & Geophysical Surveys
   Attn: James Weakland
   GIS Analyst
   3354 College Road
   Fairbanks, AK 99709-3707
   USA
   

   (907)451-5029 (voice)
   dggsgis@alaska.gov
   

   Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays

Why was the data set created?

This work was conducted as a component of the State of Alaska's Strategic and Critical Minerals Assessment Project, which was initiated to evaluate Alaska's potential for critical mineral 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: 2012 (process 1 of 3)

   Sample collection - DGGS staff and student field assistants collected select ultramafic rock samples and a chalcopyrite-bearing quartz vein sample for geochemical analysis. Location coordinates were obtained using Garmin eTrex Legend H and Garmin GPSmap 76S handheld GPS units with a typical error of 7 m or less.

   Date: 2012 (process 2 of 3)

   Sample preparation - Samples were submitted to ALS Chemex, where the rock samples were logged in the tracking system, weighed, dried, and finely crushed to better than 70 percent passing through a 2 mm (Tyler 9 mesh, U.S. Std. No. 10) screen. A split of up to 250 g was taken and pulverized to better than 85 percent passing through a 75 micron (Tyler 200 mesh, U.S. Std. No. 200) screen.

   Date: 2012 (process 3 of 3)

   Analytical methods - All samples were analyzed for ore-related trace elements and the full suite of rare-earth elements. In addition to the internal quality-control program at ALS Chemex, DGGS monitored analysis quality by inserting ore-geochemical-pulp standards with known compositions into the sample roster for every sample batch. Trace-element compositions were determined using inductively coupled plasma, atomic emission spectroscopy (ICP-AES) following a four-acid digestion process. Rare-earth- and additional trace-element compositions were determined using inductively coupled plasma, mass spectroscopy (ICP-MS). ICP-MS samples were dissolved in acid following lithium borate fusion. Platinum (Pt), palladium (Pd), and gold (Au) values were obtained from a 30-gram sample using inductively coupled plasma-atomic emission spectroscopy (ICP-AES) following fire assay. The sample from the Erbelding prospect was outside the range for copper for this method, and was re-analyzed using gravimetry (ICP-AES). Detection limits for each of the reported elemental values obtained by the various methods are provided in the digital data distribution files.

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

   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, AK, USA.

   Online Links:

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

   Other_Citation_Details: 2 p

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

1. How well have the observations been checked?

   Instrumentation detection limits were provided by ALS Chemex. In addition to the internal quality-control program at ALS Chemex, DGGS monitored analysis quality by inserting ore-geochemical-pulp standards with known compositions into the sample roster for every sample batch.

2. How accurate are the geographic locations?

   Location coordinates were obtained using Garmin eTrex Legend H and Garmin GPSmap 76S handheld GPS units with a typical error of 7 m or less.

3. How accurate are the heights or depths?

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

   All samples were analyzed for ore-related trace elements and the full suite of rare-earth elements.

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 2013-2

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/10.14509/24975>

   • Cost to order the data: Free download

Who wrote the metadata?

Dates:

Last modified: 06-Sep-2013

Metadata author:

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>