Major-oxide and trace-element geochemical data from rocks collected in the Tok River area, Tanacross A-5 and A-6 quadrangles, Alaska in 2016

Frequently anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
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  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
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  1. How well have the observations been checked?
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What does this data set describe?

1. How should this data set be cited?

   Wypych, Alicja, Sicard, K.R., Gillis, R.J., Lande, L.L., Naibert, T.J., Newberry, R.J., Twelker, Evan, Werdon, M.B., and Willingham, A.L., 2016, Major-oxide and trace-element geochemical data from rocks collected in the Tok River area, Tanacross A-5 and A-6 quadrangles, Alaska in 2016: Raw Data File RDF 2016-9, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://dx.doi.org/10.14509/29685>

   Other_Citation_Details: 3 p.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -144.066800

   East_Bounding_Coordinate: -143.030100

   North_Bounding_Coordinate: 63.290680

   South_Bounding_Coordinate: 62.999010

3. What does it look like?

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

   Calendar_Date: 2016

   Currentness_Reference: ground condition

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

   Geospatial_Data_Presentation_Form: report and digital data

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      This is a point data set.

   2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in decimal degrees.

      The horizontal datum used is World Geodetic System of 1984.
      The ellipsoid used is WGS 84.
      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?

   rdf2016-9-border.shp

   Outline of the study area. (Source: Alaska Division of Geological & Geophysical Surveys)

   rdf2016-9-rock-major-oxide-trace-element.csv, rdf2016-9-rock-major-oxide-trace-element-methods.csv

   Major- and minor-oxide and trace-element analysis of rock samples; includes magnetic susceptibility measurements. (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.

   LAB_SAMPLE_NUMBER

   Label used by the lab to identify the sample. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Geochemistry)

   The lab sample number is typically identical to the sample number. However, in some cases, the sample number used by the lab does differ from the published sample number. We provide both numbers to document instances in which the sample numbers listed on the Certificate of Assay or other laboratory results files were non-standard or found to be incorrect.

   BATCH_NUMBER

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

   FA16137565

   COLLECTOR

   The geologist who collected the sample. (Source: Alaska Division of Geological & Geophysical Surveys)

   The samples presented in this report were collected by: Alicja Wypych, Bob Gillis, Evan Twelker, Karri Sicard, Lauren Lande, Mandy Willingham, Melanie Werdon, Rainer Newberry, and Travis Naibert

   LONGITUDE

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

   Range of values
   Minimum:	-144.0086
   Maximum:	-143.0301
   Units:	decimal degrees

   LATITUDE

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

   Range of values
   Minimum:	62.99901
   Maximum:	63.24727
   Units:	decimal degrees

   DESCRIPTION

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

   Characters 1 to 254 of a brief sample or station description.

   DESCRIP_2

   Extension of the sample or station description for descriptions 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 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.

   REMARKS

   Additional comments regarding the analysis or sample processing (Source: Alaska Division of Geological & Geophysical Surveys)

   Characters 1 to 254 of a brief description.

   MAG_1

   Magnetic susceptibility measurement (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	Magnetic susceptibility measurement was not measured

   Range of values
   Minimum:	0
   Maximum:	52.7
   Units:	10^-3 SI

   MAG_2

   Magnetic susceptibility measurement (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	Magnetic susceptibility measurement was not measured

   Range of values
   Minimum:	0.001
   Maximum:	70
   Units:	10^-3 SI

   MAG_3

   Magnetic susceptibility measurement (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	Magnetic susceptibility measurement was not measured

   Range of values
   Minimum:	0
   Maximum:	47.1
   Units:	10^-3 SI

   MAG_4

   Magnetic susceptibility measurement (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	Magnetic susceptibility measurement was not measured

   Range of values
   Minimum:	0.001
   Maximum:	67.7
   Units:	10^-3 SI

   WEIGHT_KG

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

   Range of values
   Minimum:	0.12
   Maximum:	2.16
   Units:	kilograms

   SiO2_pct_ME-ICP06

   Silicon dioxide values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	33.4
   Maximum:	97.7
   Units:	percent

   Al2O3_pct_ME-ICP06

   Aluminum oxide values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.71
   Maximum:	21.6
   Units:	percent

   Fe2O3_pct_ME-ICP06

   Iron oxide (+3) values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.79
   Maximum:	19.95
   Units:	percent

   CaO_pct_ME-ICP06

   Calcium oxide values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.01
   Maximum:	30
   Units:	percent

   MgO_pct_ME-ICP06

   Magnesium oxide values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.03
   Maximum:	11.5
   Units:	percent

   Na2O_pct_ME-ICP06

   Sodium oxide values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.03
   Maximum:	7.9
   Units:	percent

   K2O_pct_ME-ICP06

   Potassium oxide values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.02
   Maximum:	6.34
   Units:	percent

   Cr2O3_pct_ME-ICP06

   Chromium oxide values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , Lithium Borate Fusion (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	0.17
   Units:	percent

   TiO2_pct_ME-ICP06

   Titanium dioxide values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.02
   Maximum:	5.31
   Units:	percent

   MnO_pct_ME-ICP06

   Manganese oxide values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.01
   Maximum:	0.52
   Units:	percent

   P2O5_pct_ME-ICP06

   Phosphorus oxide values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , Lithium Borate Fusion (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	3.41
   Units:	percent

   SrO_pct_ME-ICP06

   Strontium oxide values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , Lithium Borate Fusion (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

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

   BaO_pct_ME-ICP06

   Barium oxide values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , Lithium Borate Fusion (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	1.58
   Units:	percent

   LOI_pct_OA-GRA05

   Loss on Ignition values measured in percent; Method: Gravimetric, Thermal decomposition furnace (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.25
   Maximum:	19.4
   Units:	percent

   Total_pct_TOT-ICP06

   Total values measured in percent; Method: Calculation (Source: ALS Geochemistry)

   Range of values
   Minimum:	98
   Maximum:	102
   Units:	percent

   C_pct_C-IR07

   Carbon values measured in percent; Method: Combustion Furnace (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	4.63
   Units:	percent

   S_pct_S-IR08

   Sulfur values measured in percent; Method: Combustion Furnace (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	2.25
   Units:	percent

   Ba_ppm_ME-MS81

   Barium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	3.3
   Maximum:	>10000
   Units:	parts per million

   Ce_ppm_ME-MS81

   Cerium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	3.4
   Maximum:	213
   Units:	parts per million

   Cr_ppm_ME-MS81

   Chromium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	10
   Maximum:	1310
   Units:	parts per million

   Cs_ppm_ME-MS81

   Cesium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	26.3
   Units:	parts per million

   Dy_ppm_ME-MS81

   Dysprosium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.26
   Maximum:	21.7
   Units:	parts per million

   Er_ppm_ME-MS81

   Erbium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.11
   Maximum:	13.35
   Units:	parts per million

   Eu_ppm_ME-MS81

   Europium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.05
   Maximum:	4.38
   Units:	parts per million

   Ga_ppm_ME-MS81

   Gallium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	1.9
   Maximum:	31.3
   Units:	parts per million

   Gd_ppm_ME-MS81

   Gadolinium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.23
   Maximum:	20.3
   Units:	parts per million

   Ge_ppm_ME-MS81

   Germanium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

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

   Hf_ppm_ME-MS81

   Hafnium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.3
   Maximum:	19.5
   Units:	parts per million

   Ho_ppm_ME-MS81

   Holmium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.04
   Maximum:	4.76
   Units:	parts per million

   La_ppm_ME-MS81

   Lanthanum values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	1.2
   Maximum:	124
   Units:	parts per million

   Lu_ppm_ME-MS81

   Lutetium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.02
   Maximum:	1.9
   Units:	parts per million

   Nb_ppm_ME-MS81

   Niobium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.5
   Maximum:	122.5
   Units:	parts per million

   Nd_ppm_ME-MS81

   Neodymium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	1.5
   Maximum:	82.5
   Units:	parts per million

   Pr_ppm_ME-MS81

   Praseodymium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.35
   Maximum:	23.6
   Units:	parts per million

   Rb_ppm_ME-MS81

   Rubidium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.2
   Maximum:	230
   Units:	parts per million

   Sm_ppm_ME-MS81

   Samarium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.31
   Maximum:	18.9
   Units:	parts per million

   Sn_ppm_ME-MS81

   Tin values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	1
   Maximum:	66
   Units:	parts per million

   Sr_ppm_ME-MS81

   Strontium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	4.6
   Maximum:	1920
   Units:	parts per million

   Ta_ppm_ME-MS81

   Tantalum values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.1
   Maximum:	5.1
   Units:	parts per million

   Tb_ppm_ME-MS81

   Terbium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.04
   Maximum:	3.49
   Units:	parts per million

   Th_ppm_ME-MS81

   Thorium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.24
   Maximum:	29.5
   Units:	parts per million

   Tm_ppm_ME-MS81

   Thulium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.02
   Maximum:	1.93
   Units:	parts per million

   U_ppm_ME-MS81

   Uranium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.08
   Maximum:	6.12
   Units:	parts per million

   V_ppm_ME-MS81

   Vanadium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	5
   Maximum:	918
   Units:	parts per million

   W_ppm_ME-MS81

   Tungsten values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	1
   Maximum:	389
   Units:	parts per million

   Y_ppm_ME-MS81

   Yttrium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	1.4
   Maximum:	119.5
   Units:	parts per million

   Yb_ppm_ME-MS81

   Ytterbium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.14
   Maximum:	12.75
   Units:	parts per million

   Zr_ppm_ME-MS81

   Zirconium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Lithium Borate Fusion (Source: ALS Geochemistry)

   Range of values
   Minimum:	8
   Maximum:	728
   Units:	parts per million

   As_ppm_ME-MS42

   Arsenic values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Aqua regia (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.1
   Maximum:	>250
   Units:	parts per million

   Bi_ppm_ME-MS42

   Bismuth values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Aqua regia (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	39.7
   Units:	parts per million

   Hg_ppm_ME-MS42

   Mercury values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Aqua regia (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.005
   Maximum:	0.816
   Units:	parts per million

   In_ppm_ME-MS42

   Indium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Aqua regia (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.005
   Maximum:	0.584
   Units:	parts per million

   Re_ppm_ME-MS42

   Rhenium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Aqua regia (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.001
   Maximum:	0.014
   Units:	parts per million

   Sb_ppm_ME-MS42

   Antimony values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Aqua regia (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.05
   Maximum:	>250
   Units:	parts per million

   Se_ppm_ME-MS42

   Selenium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Aqua regia (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.2
   Maximum:	2.4
   Units:	parts per million

   Te_ppm_ME-MS42

   Tellurium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Aqua regia (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	15.3
   Units:	parts per million

   Tl_ppm_ME-MS42

   Thallium values measured in parts per million; Method: Inductively Coupled Plasma - Mass Spectroscopy, Aqua regia (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.02
   Maximum:	3.53
   Units:	parts per million

   Ag_ppm_ME-4ACD81

   Silver values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HF-HNO3-HClO4-HCl (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.5
   Maximum:	0.7
   Units:	parts per million

   Cd_ppm_ME-4ACD81

   Cadmium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HF-HNO3-HClO4-HCl (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.5
   Maximum:	2.5
   Units:	parts per million

   Co_ppm_ME-4ACD81

   Cobalt values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HF-HNO3-HClO4-HCl (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

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

   Cu_ppm_ME-4ACD81

   Copper values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HF-HNO3-HClO4-HCl (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	1
   Maximum:	515
   Units:	parts per million

   Li_ppm_ME-4ACD81

   Lithium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HF-HNO3-HClO4-HCl (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	10
   Maximum:	180
   Units:	parts per million

   Mo_ppm_ME-4ACD81

   Molybdenum values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HF-HNO3-HClO4-HCl (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

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

   Ni_ppm_ME-4ACD81

   Nickel values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HF-HNO3-HClO4-HCl (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	1
   Maximum:	281
   Units:	parts per million

   Pb_ppm_ME-4ACD81

   Lead values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HF-HNO3-HClO4-HCl (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	2
   Maximum:	88
   Units:	parts per million

   Sc_ppm_ME-4ACD81

   Scandium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HF-HNO3-HClO4-HCl (Source: ALS Geochemistry)

   Range of values
   Minimum:	1
   Maximum:	49
   Units:	parts per million

   Zn_ppm_ME-4ACD81

   Zinc values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HF-HNO3-HClO4-HCl (Source: ALS Geochemistry)

   Range of values
   Minimum:	2
   Maximum:	198
   Units:	parts per million

   Au_ppm_Au-ICP21

   Gold values measured in parts per million; Method: Fire Assay - Inductively Coupled Plasma - Atomic Emission Spectroscopy (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.001
   Maximum:	1.315
   Units:	parts per million

   rdf2016-9-rock-trace-element.csv, rdf2016-9-rock-trace-element-methods.csv

   Trace-element analysis of pulverized rock samples; includes magnetic susceptibility measurements. (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.

   LAB_SAMPLE_NUMBER

   Label used by the lab to identify the sample. (Source: Alaska Division of Geological & Geophysical Surveys and ALS Geochemistry)

   The lab sample number is typically identical to the sample number. However, in some cases, the sample number used by the lab does differ from the published sample number. We provide both numbers to document instances in which the sample numbers listed on the Certificate of Assay or other laboratory results files were non-standard or found to be incorrect.

   BATCH_NUMBER

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

   The batch numbers assigned by the lab for these results are: FA16137607, and FA16137607/FA16172469

   COLLECTOR

   The geologist who collected the sample. (Source: Alaska Division of Geological & Geophysical Surveys)

   The samples presented in this report were collected by: Alicja Wypych, Evan Twelker, Karri Sicard, Mandy Willingham, Melanie Werdon, Rainer Newberry, and Travis Naibert

   LONGITUDE

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

   Range of values
   Minimum:	-144.0668
   Maximum:	-143.09
   Units:	decimal degrees

   LATITUDE

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

   Range of values
   Minimum:	63.00379
   Maximum:	63.29068
   Units:	decimal degrees

   DESCRIPTION

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

   Characters 1 to 254 of a brief sample or station description.

   DESCRIP_2

   Extension of the sample or station description for descriptions 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 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 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.

   REMARKS

   Additional comments regarding the analysis or sample processing (Source: Alaska Division of Geological & Geophysical Surveys)

   Characters 1 to 254 of a brief description.

   MAG_1

   Magnetic susceptibility measurement (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	Magnetic susceptibility measurement was not measured

   Range of values
   Minimum:	0
   Maximum:	32.9
   Units:	10^-3 SI

   MAG_2

   Magnetic susceptibility measurement (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	Magnetic susceptibility measurement was not measured

   Range of values
   Minimum:	0
   Maximum:	65
   Units:	10^-3 SI

   MAG_3

   Magnetic susceptibility measurement (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	Magnetic susceptibility measurement was not measured

   Range of values
   Minimum:	0
   Maximum:	36
   Units:	10^-3 SI

   MAG_4

   Magnetic susceptibility measurement (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   NULL	Magnetic susceptibility measurement was not measured

   Range of values
   Minimum:	0.009
   Maximum:	3.33
   Units:	10^-3 SI

   Ag_ppm_ME-MS61

   Silver values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.
   -2	Above detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	85.5
   Units:	parts per million

   Ag_ppm_Ag-OG62

   Silver values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HNO3 -HClO4 -HF-HCl (Source: ALS Geochemistry)

   Value	Definition
   NULL	Blank (NULL) field values may indicate that either the chemical species was not analyzed or that it was measured but found to be below detection limits.

   Range of values
   Minimum:	148
   Maximum:	148
   Units:	parts per million

   Al_pct_ME-MS61

   Aluminum values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.14
   Maximum:	9.09
   Units:	percent

   As_pct_As-OG62

   Arsenic values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HNO3 -HClO4 -HF-HCl (Source: ALS Geochemistry)

   Value	Definition
   NULL	Blank (NULL) field values may indicate that either the chemical species was not analyzed or that it was measured but found to be below detection limits.

   Range of values
   Minimum:	0.889
   Maximum:	2.13
   Units:	percent

   As_ppm_ME-MS61

   Arsenic values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.
   -2	Above detection limit.

   Range of values
   Minimum:	0.2
   Maximum:	9830
   Units:	parts per million

   Au_ppm_Au-ICP21

   Gold values measured in parts per million; Method: Fire Assay - Inductively Coupled Plasma - Atomic Emission Spectroscopy (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.001
   Maximum:	9.78
   Units:	parts per million

   Ba_ppm_ME-MS61

   Barium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	10
   Maximum:	6140
   Units:	parts per million

   Be_ppm_ME-MS61

   Beryllium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.05
   Maximum:	7.6
   Units:	parts per million

   Bi_ppm_ME-MS61

   Bismuth values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.02
   Maximum:	1115
   Units:	parts per million

   Ca_pct_ME-MS61

   Calcium values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	19.25
   Units:	percent

   Cd_ppm_ME-MS61

   Cadmium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.02
   Maximum:	493
   Units:	parts per million

   Ce_ppm_ME-MS61

   Cerium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.25
   Maximum:	278
   Units:	parts per million

   Co_ppm_ME-MS61

   Cobalt values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.2
   Maximum:	176.5
   Units:	parts per million

   Cr_ppm_ME-MS61

   Chromium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	1
   Maximum:	1260
   Units:	parts per million

   Cs_ppm_ME-MS61

   Cesium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.05
   Maximum:	22.6
   Units:	parts per million

   Cu_ppm_ME-MS61

   Copper values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -2	Above detection limit.

   Range of values
   Minimum:	1.2
   Maximum:	9320
   Units:	parts per million

   Cu_pct_Cu-OG62

   Copper values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HNO3 -HClO4 -HF-HCl (Source: ALS Geochemistry)

   Value	Definition
   NULL	Blank (NULL) field values may indicate that either the chemical species was not analyzed or that it was measured but found to be below detection limits.

   Range of values
   Minimum:	1.01
   Maximum:	5.24
   Units:	percent

   Fe_pct_ME-MS61

   Iron values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.56
   Maximum:	35.7
   Units:	percent

   Ga_ppm_ME-MS61

   Gallium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.13
   Maximum:	37.2
   Units:	parts per million

   Ge_ppm_ME-MS61

   Germanium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.05
   Maximum:	0.39
   Units:	parts per million

   Hf_ppm_ME-MS61

   Hafnium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.1
   Maximum:	6.6
   Units:	parts per million

   In_ppm_ME-MS61

   Indium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.005
   Maximum:	5.71
   Units:	parts per million

   K_pct_ME-MS61

   Potassium values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	5.51
   Units:	percent

   La_ppm_ME-MS61

   Lanthanum values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.5
   Maximum:	175
   Units:	parts per million

   Li_ppm_ME-MS61

   Lithium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.4
   Maximum:	97.7
   Units:	parts per million

   Mg_pct_ME-MS61

   Magnesium values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	14.5
   Units:	percent

   Mn_ppm_ME-MS61

   Manganese values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	40
   Maximum:	27900
   Units:	parts per million

   Mo_ppm_ME-MS61

   Molybdenum values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.07
   Maximum:	39.1
   Units:	parts per million

   Na_pct_ME-MS61

   Sodium values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	4.8
   Units:	percent

   Nb_ppm_ME-MS61

   Niobium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.1
   Maximum:	34.6
   Units:	parts per million

   Ni_ppm_ME-MS61

   Nickel values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.7
   Maximum:	686
   Units:	parts per million

   P_ppm_ME-MS61

   Phosphorus values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	10
   Maximum:	3410
   Units:	parts per million

   Pb_ppm_ME-MS61

   Lead values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.
   -2	Above detection limit.

   Range of values
   Minimum:	0.6
   Maximum:	9230
   Units:	parts per million

   Pb_pct_Pb-OG62

   Lead values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HNO3 -HClO4 -HF-HCl (Source: ALS Geochemistry)

   Value	Definition
   NULL	Blank (NULL) field values may indicate that either the chemical species was not analyzed or that it was measured but found to be below detection limits.

   Range of values
   Minimum:	1.23
   Maximum:	8.8
   Units:	percent

   Rb_ppm_ME-MS61

   Rubidium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.1
   Maximum:	223
   Units:	parts per million

   Re_ppm_ME-MS61

   Rhenium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.002
   Maximum:	0.038
   Units:	parts per million

   S_pct_S-OG62

   Sulfur values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HNO3 -HClO4 -HF-HCl (Source: ALS Geochemistry)

   Value	Definition
   NULL	Blank (NULL) field values may indicate that either the chemical species was not analyzed or that it was measured but found to be below detection limits.

   Range of values
   Minimum:	10.35
   Maximum:	38.2
   Units:	percent

   S_pct_ME-MS61

   Sulfur values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.
   -2	Above detection limit.

   Range of values
   Minimum:	0.01
   Maximum:	9.91
   Units:	percent

   Sb_pct_ME-XRF15c

   Antimony values measured in percent; Method: X-Ray Fluorescence , Lithium Metaborate Fusion (Source: ALS Geochemistry)

   Value	Definition
   NULL	Blank (NULL) field values may indicate that either the chemical species was not analyzed or that it was measured but found to be below detection limits.

   Range of values
   Minimum:	5.65
   Maximum:	31
   Units:	percent

   Sb_ppm_ME-MS61

   Antimony values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -2	Above detection limit.

   Range of values
   Minimum:	0.1
   Maximum:	890
   Units:	parts per million

   Sc_ppm_ME-MS61

   Scandium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.1
   Maximum:	46.3
   Units:	parts per million

   Se_ppm_ME-MS61

   Selenium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	1
   Maximum:	169
   Units:	parts per million

   Sn_ppm_ME-MS61

   Tin values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.2
   Maximum:	122
   Units:	parts per million

   Sr_ppm_ME-MS61

   Strontium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	1
   Maximum:	1805
   Units:	parts per million

   Ta_ppm_ME-MS61

   Tantalum values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.05
   Maximum:	1.9
   Units:	parts per million

   Te_ppm_ME-MS61

   Tellurium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.05
   Maximum:	22.7
   Units:	parts per million

   Th_ppm_ME-MS61

   Thorium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.04
   Maximum:	20.1
   Units:	parts per million

   Ti_pct_ME-MS61

   Titanium values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.005
   Maximum:	2.02
   Units:	percent

   Tl_ppm_ME-MS61

   Thallium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.02
   Maximum:	3.82
   Units:	parts per million

   U_ppm_ME-MS61

   Uranium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.1
   Maximum:	10.7
   Units:	parts per million

   V_ppm_ME-MS61

   Vanadium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	1
   Maximum:	581
   Units:	parts per million

   W_ppm_ME-MS61

   Tungsten values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.1
   Maximum:	281
   Units:	parts per million

   Y_ppm_ME-MS61

   Yttrium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Range of values
   Minimum:	0.1
   Maximum:	72
   Units:	parts per million

   Zn_pct_Zn-OG62

   Zinc values measured in percent; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy , HNO3 -HClO4 -HF-HCl (Source: ALS Geochemistry)

   Value	Definition
   NULL	Blank (NULL) field values may indicate that either the chemical species was not analyzed or that it was measured but found to be below detection limits.

   Range of values
   Minimum:	1.06
   Maximum:	13.35
   Units:	percent

   Zn_ppm_ME-MS61

   Zinc values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.
   -2	Above detection limit.

   Range of values
   Minimum:	3
   Maximum:	9630
   Units:	parts per million

   Zr_ppm_ME-MS61

   Zirconium values measured in parts per million; Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy/Inductively Coupled - Plasma Mass Spectrometry, HF-HNO3 -HClO4 Acid Digestion, HCl Leach (Source: ALS Geochemistry)

   Value	Definition
   -1	Below detection limit.

   Range of values
   Minimum:	0.5
   Maximum:	289
   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)
   • Wypych, Alicja
   • Sicard, K.R.
   • Gillis, R.J.
   • Lande, L.L.
   • Naibert, T.J.
   • Newberry, R.J.
   • Twelker, Evan
   • Werdon, M.B.
   • Willingham, A.L.

2. Who also contributed to the data set?

   The DGGS Tok River project is funded through U.S. Geological Survey STATEMAP Award No. G16AC00182; Cooperative Agreement Number G16AC00167 between the U.S. Geological Survey and the Alaska Department of Natural Resources, Division of Geological & Geophysical Surveys; and by State of Alaska general funds.

3. To whom should users address questions about the data?
   Alaska Division of Geological & Geophysical Surveys
   GIS Manager
   3354 College Rd
   Fairbanks, AK 99709-3707
   USA
   

   907-451-5020 (voice)
   dggsgis@alaska.gov
   

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

Why was the data set created?

The combination of insufficient detailed geologic mapping, historical and current industry interest in the adjacent mineralized areas, and the recently published geophysical data prompted the DGGS Mineral Resources section to work in the Tok River area. Major- and trace-element geochemical analyses were obtained for the metamorphic rocks to distinguish between igneous and sedimentary protoliths and for igneous rocks to characterize and differentiate Mesozoic and Cenozoic rocks in the area.

How was the data set created?

1. From what previous works were the data drawn?

   Dashevsky, S.S. and others, 2003 (source 1 of 3)

   Dashevsky, S.S., Schaefer, C.F., and Hunter, E.N., 2003, Bedrock geologic map of the Delta mineral belt, Tok mining district, Alaska: Professional Report PR 122, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://doi.org/10.14509/2923>

   Other_Citation_Details: 122 p., 2 sheets, scale 1:63,360

   Type_of_Source_Media: paper

   Source_Scale_Denominator: 63360

   Source_Contribution: sample selection

   Foster, H.L., 1970 (source 2 of 3)

   Foster, H.L., 1970, Reconnaissance geologic map of the Tanacross Quadrangle, Alaska: Miscellaneous Geologic Investigations Map I 593, U.S. Geological Survey, United States.

   Online Links:

   • <http://dggs.alaska.gov/pubs/id/12871>

   Other_Citation_Details: 1 sheet, scale 1:250,000

   Type_of_Source_Media: paper

   Source_Scale_Denominator: 250000

   Source_Contribution: sample selection

   Nokleberg, W.J. and others, 2015 (source 3 of 3)

   Nokleberg, W.J., Aleinikoff, J.N., Bond, G.C., Ferrians, O.J., Jr., Herzon, P.L., Lange, I.M., Miyaoka, R.T., Richter, D.H., Schwab, C.E., Silva, S.R., Smith, T.E., and Zehner, R.E., 2015, Geologic maps of the eastern Alaska Range, Alaska (44 quadrangles, 1:63,360 scale), with descriptions and interpretations of map units: Report of Investigation RI 2015-6, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://doi.org/10.14509/29444>

   Other_Citation_Details: 64 p., 45 sheets, scale 1:63,360

   Type_of_Source_Media: paper

   Source_Scale_Denominator: 63360

   Source_Contribution: sample selection

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

   Date: 2016 (process 1 of 6)

   Sample selection - Rock samples were collected for two different purposes. First, samples of visibly mineralized or altered rock were preferentially collected and analyzed for trace-element geochemistry. Second, igneous and metaigneous rocks showing little alteration or weathering were collected for whole-rock major-oxide, minor-oxide, and trace-element analyses to aid in classification and study of petrogenesis and tectonic setting. Most samples are 'grab' samples, which were collected for their overall representation of the outcrop. However, a few samples are 'select' samples, which were more deliberately collected from a specific feature, as noted in the sample field description.

   Data sources used in this process:

   • Dashevsky, S.S. and others, 2003
   • Foster, H.L., 1970
   • Nokleberg, W.J. and others, 2015

   Date: 2016 (process 2 of 6)

   Magnetic susceptibility measurements - Magnetic susceptibility measurements were collected in the field using Terraplus KT 5, 6, 9, and 10 model handheld magnetic susceptibility meters. The values reported here are four individual measurements performed on representative surfaces of the sampled rock outcrop. Blank values in the magnetic susceptibility fields of this dataset indicate that the geologist who collected the sample was not equipped with a magnetic susceptibility meter or that the meter was not functioning properly.

   Date: 2016 (process 3 of 6)

   Sample preparation - Rock samples were processed by ALS Geochemistry using their PREP-31 package. The samples were crushed to greater than 70 percent passing 2 mm, and a 250 g split was pulverized to greater than 85 percent passing 75 microns. Prior to crushing, samples for whole-rock analysis were trimmed by DGGS staff to remove weathering, and cut surfaces were sanded to remove any saw metal.

   Date: 2016 (process 4 of 6)

   Major- and trace-element compositions - Major- and trace-element values for rock samples were determined by ALS Geochemistry method ME-MS61: Four-acid digestion followed by inductively-coupled plasma-atomic emission spectrometry (ICP-AES) and inductively-coupled plasma-mass spectroscopy (ICP-MS); Au values were analyzed using flux digestion and fire assay and ICP-AES (ALS Geochemistry method Au-ICP21). Samples that exceeded detection limits for elements of interest were reanalyzed using specific elemental tests. Over-limit values for Ag, Cu, Pb, As, S, and Zn were analyzed using four-acid digestion followed by inductively-coupled plasma-atomic emission spectrometry (ALS Geochemistry method ME-OG62). Over-limit values for Sb were determined using lithium metaborate fusion and X-ray fluorescence (ALS Geochemistry method ME-XRF15c).

   Date: 2016 (process 5 of 6)

   Whole-rock geochemistry - For whole-rock geochemistry samples, major and minor oxides were analyzed by lithium metaborate fusion digestion and ICP-AES (ALS Geochemistry method ME-ICP06). Trace elements, including rare-earth elements, were determined using lithium metaborate fusion digestion and ICP-MS (ALS Geochemistry method ME-MS81). Ag, Cd, Co, Cu, Li, Mo, Ni, Pb, Sc, and Zn were determined by four-acid digestion and ICP-AES (ALS Geochemistry method ME-4ACD81); and As, Bi, Hg, In, Re, Sb, Se, Te, and Tl were determined by aqua regia digestion followed by ICP-MS (ALS Geochemistry method ME-MS42). Total C and S were analyzed by Leco furnace (ALS Geochemistry methods C-IR07 and S-IR08, respectively).

   Date: 2016 (process 6 of 6)

   Sample archival - Samples collected during this project, as well as laboratory sample rejects and pulps, will be stored at DGGS for the duration of the project and will be available for public viewing upon request. Once the project concludes, the samples and pulps will be stored at the Alaska Geologic Materials Center in Anchorage.

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

   Emond, A.M., CGG, Burns, L.E., Graham, G.R.C., and (US), CGG Land Inc., 2015, Tok electromagnetic and magnetic airborne geophysical survey data compilation: Geophysical Report GPR 2015-2, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://doi.org/10.14509/29347>

   Naibert, T.J., Werdon, M.B., Lande, Lauren, and Wypych, Alicja, 2016, Trace-element geochemical data from stream sediments collected in the Tok River area, Tanacross A-5 and A-6 quadrangles, Alaska in 2016: Raw Data File RDF 2016-10, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://doi.org/10.14509/29688>

   Other_Citation_Details: 3 p

   Twelker, Evan, Freeman, L.K., Sicard, K.R., and Busk, A.C., 2016, Preliminary report on mineral occurrences in the Tok River area, Alaska: Preliminary Interpretive Report PIR 2016-2, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://doi.org/10.14509/29605>

   Other_Citation_Details: 7 p

   Wypych, Alicja, Sicard, K.R., Twelker, Evan, Freeman, L.K., Lande, Lauren, and Reioux, D.A., 2015, Major-oxide and trace-element geochemical data from rocks collected in 2015 in the Tok area, Tanacross A-5, A-6, and parts of adjacent quadrangles, Alaska: Raw Data File RDF 2015-15, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://doi.org/10.14509/29517>

   Other_Citation_Details: 3 p

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

1. How well have the observations been checked?

   Coordinates of sample locations were determined by the geologists in the field using using hand-held GPS devices. Sample numbers were recorded in the field on sample bags and on field note sheets. The sample location tables were plotted in GIS software to visually verify location accuracy and cross checked for consistency against the sample numbers recorded on the bags. In addition to ALS Geochemistry's accredited (ISO/IEC 17025-2005) internal quality-control program, DGGS monitored analysis quality with one standard reference material per batch of 20 analyses. Lab results were examined by the DGGS geologists to ensure that they are reasonable given the geologic context of the sample. Inconsistencies between the field data and the lab sample numbers listed on the COA (certificate of assay) are noted in the data tables.

2. How accurate are the geographic locations?

   Locations were recorded using handheld, WAAS-enabled GPS devices. WAAS-enabled GPS devices have a reported error of about 1 m (NSTB/WAAS T&E Team, 2006). Depending on degradation of the WAAS and GPS signals, the horizontal position error of sample locations in this report is in the range of 1-10 m.

3. How accurate are the heights or depths?

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

   This data release is complete. The data tables have been lightly edited for clarity, but are generally provided as received from the lab.

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

   not applicable

How can someone get a copy of the data set?

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

Access_Constraints:

This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).

Use_Constraints:

Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.

1. Who distributes the data set? (Distributor 1 of 1)
   Alaska Division of Geological & Geophysical Surveys
   3354 College Road
   Fairbanks, AK 99709-3707
   USA
   

   (907)451-5020 (voice)
   (907)451-5050 (FAX)
   dggspubs@alaska.gov
   

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

   Contact_Instructions:

   Please view our website (<http://www.dggs.alaska.gov>) for the latest information on available data. Please contact us using the e-mail address provided above when possible.

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

   RDF 2016-9

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/10.14509/29685>

   • Cost to order the data: Free download

Who wrote the metadata?

Dates:

Last modified: 02-Nov-2016

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>