Major-oxide and trace-element geochemical data from rocks collected in 2015 in the Wrangellia mineral assessment area, Alaska

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What does this data set describe?

Title:

Major-oxide and trace-element geochemical data from rocks collected in 2015 in the Wrangellia mineral assessment area, Alaska

Abstract:

Late Triassic mafic to ultramafic intrusions in the Wrangellia terrane are host to magmatic sulfide nickel-copper-cobalt and platinum-group element (PGE) mineralization. DGGS's mineral-resources group carried out a geologic mapping project in the eastern Denali Highway region between Watana Creek and Paxson from July 29 through August 7, 2015. This project is part of a multi-year effort focusing on improving the publicly available geological and geochemical data and assessing the mineral potential of the less-explored extension of the western Wrangellia terrane; other data resulting from this project include geophysical surveys and several geochemical datasets. This program of geologic mapping and rock sampling was conducted as part of the State of Alaska's Strategic and Critical Minerals Assessment project, an initiative designed to evaluate Alaska's potential for rare-earth elements, PGEs, and other similarly supply-challenged resources. Highlights of this project include identification, sampling, and characterization of a broad section of Wrangellia stratigraphy, including Late Triassic ultramafic and mafic intrusions thought to be a part of the Ni-Cu-Co-PGE- and Cu-Ag-mineralized Wrangellia large igneous province. This dataset includes four samples with high copper values (1.6 to 4.62 percent) and elevated silver values (10.15 to 18.25 ppm) and two samples have elevated copper (1,400 and 4,610 ppm); those samples are scattered throughout the area. Two samples from the Caribou Dome area show elevated platinum (0.113 and 0.101 ppm) and palladium (0.141 and 0.193 ppm). The analytical data tables associated with this report are being released in digital format as comma-delimited text (CSV) files.

Supplemental_Information:

border:    Outline of the study area.
rock-major-minor-oxide-trace-element-ree:    Major- and minor-oxide, trace-element, and rare-earth-element analysis of pulverized rock samples; includes magnetic susceptibility measurements
rock-trace-element-ree:    Trace-element analysis of pulverized rock samples; includes magnetic susceptibility measurements

How should this data set be cited?
Wypych, Alicja, Twelker, Evan, Freeman, L.K., Lande, Lauren, Newberry, R.J., Reioux, D.A., and Sicard, K.R., 2015, Major-oxide and trace-element geochemical data from rocks collected in 2015 in the Wrangellia mineral assessment area, Alaska: Raw Data File RDF 2015-16, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.
Online Links:
- <http://dx.doi.org/10.14509/29518>
Other_Citation_Details: 4 p.
What geographic area does the data set cover?

West_Bounding_Coordinate: -147.965256

East_Bounding_Coordinate: -145.779611

North_Bounding_Coordinate: 63.352248

South_Bounding_Coordinate: 62.855292
What does it look like?
Does the data set describe conditions during a particular time period?

Calendar_Date: 2015
Currentness_Reference: publication date
What is the general form of this data set?

Geospatial_Data_Presentation_Form: report and digital data
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 .000001. Longitudes are given to the nearest .000001. 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.

How does the data set describe geographic features?

rdf2015-16-border.shp

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

rdf2015-16-rock-major-minor-oxide-trace-element-ree.csv, rdf2015-16-rock-major-minor-oxide-trace-element-ree-limits.csv

Major- and minor-oxide, trace-element, and rare-earth-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 Minerals)

Value	Definition
NULL	The lab sample number is identical to the sample number.

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 Minerals)

Value	Definition
NULL	The lab sample number is identical to the sample number.

FA15140858

LONGITUDE

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

Range of values
Minimum:	-147.965256
Maximum:	-145.779611
Units:	decimal degrees

LATITUDE

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

Range of values
Minimum:	62.855292
Maximum:	63.352248
Units:	decimal degrees

LOCATION_METHOD

technique used to determine station location. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
GPS	Location data were collected using Trimble Juno T41/5 WAAS-enabled GPS devices running ArcGIS for Windows Mobile. WAAS-enabled GPS devices have a reported error of about 1 m.

SAMPLE_MATERIAL

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

Rock

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, David Reioux, Evan Twelker, Karri Sicard, Larry Freeman, Lauren Lande, and Rainer Newberry

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 which are greater than 254 characters in length (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	The descriptive text is shorter than 254 characters.

Characters greater than 254 of the sample or station description.

MAG_AVG

average magnetic susceptibility (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	average magnetic susceptibility was not measured

Range of values
Minimum:	0
Maximum:	108.5
Units:	10^-3 SI

WEIGHT_KG

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

Range of values
Minimum:	0.09
Maximum:	2.06
Units:	kilograms

Au_ppm_PGM-MS23

Gold values measured in parts per million (ppm); Method: Fire Assay - Inductively Coupled Plasma - Mass Spectrometry (FA-ICP-MS); Lower detection limit = 0.001 ppm; Upper detection limit = 1 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.001
Maximum:	0.127
Units:	parts per million

Pt_ppm_PGM-MS23

Platinum values measured in parts per million (ppm); Method: Fire Assay - Inductively Coupled Plasma - Mass Spectrometry (FA-ICP-MS); Lower detection limit = 0.0005 ppm; Upper detection limit = 1 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.0005
Maximum:	0.113
Units:	parts per million

Pd_ppm_PGM-MS23

Palladium values measured in parts per million (ppm); Method: Fire Assay - Inductively Coupled Plasma - Mass Spectrometry (FA-ICP-MS); Lower detection limit = 0.001 ppm; Upper detection limit = 1 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.001
Maximum:	0.193
Units:	parts per million

SiO2_pct_ME-ICP06

Silicon dioxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	30.1
Maximum:	74.9
Units:	percent

Al2O3_pct_ME-ICP06

Aluminum oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.35
Maximum:	19.35
Units:	percent

Fe2O3_pct_ME-ICP06

Iron oxide (+3) values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	1.29
Maximum:	22.3
Units:	percent

CaO_pct_ME-ICP06

Calcium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.13
Maximum:	18.2
Units:	percent

MgO_pct_ME-ICP06

Magnesium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.38
Maximum:	42.4
Units:	percent

Na2O_pct_ME-ICP06

Sodium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.01
Maximum:	6.77
Units:	percent

K2O_pct_ME-ICP06

Potassium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	6.26
Units:	percent

Cr2O3_pct_ME-ICP06

Chromium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	1.01
Units:	percent

TiO2_pct_ME-ICP06

Titanium dioxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.03
Maximum:	3.19
Units:	percent

MnO_pct_ME-ICP06

Manganese oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.03
Maximum:	0.34
Units:	percent

P2O5_pct_ME-ICP06

Phosphorus oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	1.64
Units:	percent

SrO_pct_ME-ICP06

Strontium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	0.13
Units:	percent

BaO_pct_ME-ICP06

Barium oxide values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), Lithium Metaborate/Lithium Tetraborate Fusion; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	0.78
Units:	percent

LOI_pct_OA-GRA05

Loss on Ignition values measured in percent (pct); Method: Gravimetric (GRAV), Thermal decomposition furnace; Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	-0.04
Maximum:	14
Units:	percent

Total_pct_TOT-ICP06

Total values measured in percent (pct); Method: Calculation (Calculation); Lower detection limit = 0.01 pct; Upper detection limit = 100 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	98.04
Maximum:	101.95
Units:	percent

C_pct_C-IR07

Carbon values measured in percent (pct); Method: Combustion Furnace (Combustion Furnace); 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	2.46
Units:	percent

S_pct_S-IR08

Sulfur values measured in percent (pct); Method: Combustion Furnace (Combustion Furnace); 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	1.21
Units:	percent

Ba_ppm_ME-MS81

Barium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Range of values
Minimum:	2.4
Maximum:	7750
Units:	parts per million

Ce_ppm_ME-MS81

Cerium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.5
Maximum:	92
Units:	parts per million

Cr_ppm_ME-MS81

Chromium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	7030
Units:	parts per million

Cs_ppm_ME-MS81

Cesium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 0.01 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	5.35
Units:	parts per million

Dy_ppm_ME-MS81

Dysprosium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.09
Maximum:	9.9
Units:	parts per million

Er_ppm_ME-MS81

Erbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.03
Maximum:	5.25
Units:	parts per million

Eu_ppm_ME-MS81

Europium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.03
Maximum:	3.1
Units:	parts per million

Ga_ppm_ME-MS81

Gallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 0.1 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	1
Maximum:	26.1
Units:	parts per million

Gd_ppm_ME-MS81

Gadolinium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.11
Maximum:	10.95
Units:	parts per million

Ge_ppm_ME-MS81

Germanium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 5 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Hf_ppm_ME-MS81

Hafnium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.2
Maximum:	7.6
Units:	parts per million

Ho_ppm_ME-MS81

Holmium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	1.9
Units:	parts per million

La_ppm_ME-MS81

Lanthanum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.5
Maximum:	51.5
Units:	parts per million

Lu_ppm_ME-MS81

Lutetium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	0.69
Units:	parts per million

Nb_ppm_ME-MS81

Niobium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.2
Maximum:	40.5
Units:	parts per million

Nd_ppm_ME-MS81

Neodymium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Range of values
Minimum:	0.2
Maximum:	40.1
Units:	parts per million

Pr_ppm_ME-MS81

Praseodymium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Range of values
Minimum:	0.04
Maximum:	10.3
Units:	parts per million

Rb_ppm_ME-MS81

Rubidium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Range of values
Minimum:	0.2
Maximum:	154.5
Units:	parts per million

Sm_ppm_ME-MS81

Samarium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.05
Maximum:	10.6
Units:	parts per million

Sn_ppm_ME-MS81

Tin values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	129
Units:	parts per million

Sr_ppm_ME-MS81

Strontium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Range of values
Minimum:	1.5
Maximum:	1120
Units:	parts per million

Ta_ppm_ME-MS81

Tantalum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.1
Maximum:	2.1
Units:	parts per million

Tb_ppm_ME-MS81

Terbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	1.73
Units:	parts per million

Th_ppm_ME-MS81

Thorium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.05
Maximum:	10.35
Units:	parts per million

Tm_ppm_ME-MS81

Thulium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	0.72
Units:	parts per million

U_ppm_ME-MS81

Uranium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.05
Maximum:	3.91
Units:	parts per million

V_ppm_ME-MS81

Vanadium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 5 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	5
Maximum:	916
Units:	parts per million

W_ppm_ME-MS81

Tungsten values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

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

Y_ppm_ME-MS81

Yttrium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.7
Maximum:	50.1
Units:	parts per million

Yb_ppm_ME-MS81

Ytterbium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; 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: ALS Minerals)

Range of values
Minimum:	0.03
Maximum:	4.7
Units:	parts per million

Zr_ppm_ME-MS81

Zirconium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Lithium Metaborate Fusion; Lower detection limit = 2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	2
Maximum:	346
Units:	parts per million

As_ppm_ME-MS42

Arsenic values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.1 ppm; Upper detection limit = 250 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.1
Maximum:	81.7
Units:	parts per million

Bi_ppm_ME-MS42

Bismuth values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.01 ppm; Upper detection limit = 250 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.01
Maximum:	0.19
Units:	parts per million

Hg_ppm_ME-MS42

Mercury values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.005 ppm; Upper detection limit = 25 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.005
Maximum:	0.582
Units:	parts per million

In_ppm_ME-MS42

Indium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.005 ppm; Upper detection limit = 250 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.005
Maximum:	0.096
Units:	parts per million

Re_ppm_ME-MS42

Rhenium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.001 ppm; Upper detection limit = 250 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.001
Maximum:	0.005
Units:	parts per million

Sb_ppm_ME-MS42

Antimony values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.05 ppm; Upper detection limit = 250 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.05
Maximum:	1.76
Units:	parts per million

Se_ppm_ME-MS42

Selenium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.2 ppm; Upper detection limit = 250 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

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 (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.01 ppm; Upper detection limit = 250 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.01
Maximum:	0.33
Units:	parts per million

Tl_ppm_ME-MS42

Thallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Mass Spectroscopy (ICP-MS), Aqua regia; Lower detection limit = 0.02 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.02
Maximum:	0.52
Units:	parts per million

Ag_ppm_ME-4ACD81

Silver values measured in parts per million (ppm); Method: 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.5
Maximum:	1.3
Units:	parts per million

Cd_ppm_ME-4ACD81

Cadmium values measured in parts per million (ppm); Method: 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.5
Maximum:	1.4
Units:	parts per million

Co_ppm_ME-4ACD81

Cobalt values measured in parts per million (ppm); Method: 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: ALS Minerals)

Range of values
Minimum:	2
Maximum:	176
Units:	parts per million

Cu_ppm_ME-4ACD81

Copper values measured in parts per million (ppm); Method: 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: ALS Minerals)

Range of values
Minimum:	1
Maximum:	1400
Units:	parts per million

Li_ppm_ME-4ACD81

Lithium values measured in parts per million (ppm); Method: 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	10
Maximum:	50
Units:	parts per million

Mo_ppm_ME-4ACD81

Molybdenum values measured in parts per million (ppm); Method: 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

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

Ni_ppm_ME-4ACD81

Nickel values measured in parts per million (ppm); Method: 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	1
Maximum:	2960
Units:	parts per million

Pb_ppm_ME-4ACD81

Lead values measured in parts per million (ppm); Method: 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	2
Maximum:	20
Units:	parts per million

Sc_ppm_ME-4ACD81

Scandium values measured in parts per million (ppm); Method: 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: ALS Minerals)

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

Zn_ppm_ME-4ACD81

Zinc values measured in parts per million (ppm); Method: 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: ALS Minerals)

Range of values
Minimum:	17
Maximum:	232
Units:	parts per million

rdf2015-16-rock-trace-element-ree.csv, rdf2015-16-rock-trace-element-ree-limits.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)

LAB_SAMPLE_NUMBER

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

Value	Definition
NULL	The lab sample number is identical to the sample number.

BATCH_NUMBER

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

Value	Definition
NULL	The lab sample number is identical to the sample number.

FA15140887

LONGITUDE

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

Range of values
Minimum:	-147.964956
Maximum:	-145.867279
Units:	decimal degrees

LATITUDE

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

Range of values
Minimum:	62.859736
Maximum:	63.350462
Units:	decimal degrees

LOCATION_METHOD

technique used to determine station location. (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
GPS	Location data were collected using Trimble Juno T41/5 WAAS-enabled GPS devices running ArcGIS for Windows Mobile. WAAS-enabled GPS devices have a reported error of about 1 m.
visual approximation	Sample location coordinates were estimated from topographic map features. The position error is approximately 100 meters.

SAMPLE_MATERIAL

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

Rock

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, David Reioux, Evan Twelker, Karri Sicard, Larry Freeman, Lauren Lande, and T.E. Smith

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 which are greater than 254 characters in length (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	The descriptive text is shorter than 254 characters.

Characters greater than 254 of the sample or station description.

MAG_AVG

average magnetic susceptibility (Source: Alaska Division of Geological & Geophysical Surveys)

Value	Definition
NULL	average magnetic susceptibility was not measured

Range of values
Minimum:	0
Maximum:	102.53
Units:	10^-3 SI

WEIGHT_KG

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

Range of values
Minimum:	0.1
Maximum:	2.54
Units:	kilograms

Au_ppm_PGM-MS23

Range of values
Minimum:	0.001
Maximum:	0.159
Units:	parts per million

Pt_ppm_PGM-MS23

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.001
Maximum:	0.0208
Units:	parts per million

Pd_ppm_PGM-MS23

Range of values
Minimum:	0.001
Maximum:	0.045
Units:	parts per million

Ag_ppm_ME-MS61

Silver values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.01 ppm; Upper detection limit = 100 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.03
Maximum:	54.4
Units:	parts per million

Al_pct_ME-MS61

Aluminum values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	0.19
Maximum:	8.38
Units:	percent

As_ppm_ME-MS61

Arsenic values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	1.4
Maximum:	138.5
Units:	parts per million

Ba_ppm_ME-MS61

Barium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	10
Maximum:	2170
Units:	parts per million

Be_ppm_ME-MS61

Beryllium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	0.06
Maximum:	0.96
Units:	parts per million

Bi_ppm_ME-MS61

Bismuth values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.01 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.02
Maximum:	0.52
Units:	parts per million

Ca_pct_ME-MS61

Calcium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	0.1
Maximum:	24.9
Units:	percent

Cd_ppm_ME-MS61

Cadmium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.02 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.03
Maximum:	528
Units:	parts per million

Ce_ppm_ME-MS61

Cerium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.01 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	1.27
Maximum:	30.3
Units:	parts per million

Co_ppm_ME-MS61

Cobalt values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	3.3
Maximum:	127
Units:	parts per million

Cr_ppm_ME-MS61

Chromium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	4
Maximum:	3650
Units:	parts per million

Cs_ppm_ME-MS61

Cesium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.05 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.09
Maximum:	2.58
Units:	parts per million

Cu_ppm_ME-MS61

Copper values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Value	Definition
-2	Above detection limit.

Range of values
Minimum:	22.7
Maximum:	4610
Units:	parts per million

Fe_pct_ME-MS61

Iron values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	2.96
Maximum:	26.3
Units:	percent

Ga_ppm_ME-MS61

Gallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.05 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.69
Maximum:	20.1
Units:	parts per million

Ge_ppm_ME-MS61

Germanium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.05 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.05
Maximum:	1.05
Units:	parts per million

Hf_ppm_ME-MS61

Hafnium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.1 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.1
Maximum:	3.8
Units:	parts per million

In_ppm_ME-MS61

Indium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.005 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.005
Maximum:	0.142
Units:	parts per million

K_pct_ME-MS61

Potassium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	0.02
Maximum:	3.31
Units:	percent

La_ppm_ME-MS61

Lanthanum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	0.7
Maximum:	15.8
Units:	parts per million

Li_ppm_ME-MS61

Lithium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	0.8
Maximum:	38.3
Units:	parts per million

Mg_pct_ME-MS61

Magnesium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	0.22
Maximum:	16.95
Units:	percent

Mn_ppm_ME-MS61

Manganese values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 5 ppm; Upper detection limit = 100000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	304
Maximum:	2590
Units:	parts per million

Mo_ppm_ME-MS61

Molybdenum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.05 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.15
Maximum:	75.3
Units:	parts per million

Na_pct_ME-MS61

Sodium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	0.01
Maximum:	3.07
Units:	percent

Nb_ppm_ME-MS61

Niobium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.1 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.2
Maximum:	14.8
Units:	parts per million

Ni_ppm_ME-MS61

Nickel values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	7
Maximum:	1050
Units:	parts per million

P_ppm_ME-MS61

Phosphorus values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 10 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	160
Maximum:	5900
Units:	parts per million

Pb_ppm_ME-MS61

Lead values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	0.5
Maximum:	118
Units:	parts per million

Rb_ppm_ME-MS61

Rubidium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	0.5
Maximum:	42.3
Units:	parts per million

Re_ppm_ME-MS61

Rhenium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.002 ppm; Upper detection limit = 50 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.002
Maximum:	0.214
Units:	parts per million

S_pct_ME-MS61

Sulfur values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

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

Range of values
Minimum:	0.1
Maximum:	7.44
Units:	percent

Sb_ppm_ME-MS61

Antimony values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.05 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.09
Maximum:	4.31
Units:	parts per million

Sc_ppm_ME-MS61

Scandium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	0.4
Maximum:	45.7
Units:	parts per million

Se_ppm_ME-MS61

Selenium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 1 ppm; Upper detection limit = 1000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	1
Maximum:	8
Units:	parts per million

Sn_ppm_ME-MS61

Tin values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.2 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.2
Maximum:	2
Units:	parts per million

Sr_ppm_ME-MS61

Strontium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	10.6
Maximum:	586
Units:	parts per million

Ta_ppm_ME-MS61

Tantalum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.05 ppm; Upper detection limit = 100 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.06
Maximum:	0.9
Units:	parts per million

Te_ppm_ME-MS61

Tellurium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.05 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.05
Maximum:	3.19
Units:	parts per million

Th_ppm_ME-MS61

Thorium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.2
Maximum:	4.4
Units:	parts per million

Ti_pct_ME-MS61

Titanium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.005 pct; Upper detection limit = 10 pct; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	0.009
Maximum:	1.675
Units:	percent

Tl_ppm_ME-MS61

Thallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.02 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Value	Definition
-1	Below detection limit.

Range of values
Minimum:	0.02
Maximum:	126.5
Units:	parts per million

U_ppm_ME-MS61

Uranium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	0.1
Maximum:	4.7
Units:	parts per million

V_ppm_ME-MS61

Vanadium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 1 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	11
Maximum:	582
Units:	parts per million

W_ppm_ME-MS61

Tungsten values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	0.1
Maximum:	1
Units:	parts per million

Y_ppm_ME-MS61

Yttrium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 0.1 ppm; Upper detection limit = 500 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	1.7
Maximum:	30.3
Units:	parts per million

Zn_ppm_ME-MS61

Zinc values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; Lower detection limit = 2 ppm; Upper detection limit = 10000 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

Range of values
Minimum:	21
Maximum:	2760
Units:	parts per million

Zr_ppm_ME-MS61

Zirconium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy - Mass Spectrometry (ICP-AES-MS), HF-HNO3 -HClO4 Acid Digestion, HCl Leach; 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: ALS Minerals)

Range of values
Minimum:	4.1
Maximum:	150
Units:	parts per million

Cu_pct_Cu-OG62

Copper values measured in percent (pct); Method: 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: ALS Minerals)

Value	Definition
NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

Range of values
Minimum:	1.645
Maximum:	20.6
Units:	percent

Who produced the data set?

Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
- Wypych, Alicja
- Twelker, Evan
- Freeman, L.K.
- Lande, Lauren
- Newberry, R.J.
- Reioux, D.A.
- Sicard, K.R.
Who also contributed to the data set?

This project is funded by Capital Improvement Project funds through the State's Strategic and Critical Minerals Assessment program, a component of the Alaska Airborne Geophysical/Geological Mineral Inventory Program founded by the Alaska State Legislature and managed by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys.
To whom should users address questions about the data?

Alaska Division of Geological & Geophysical Surveys
GIS Manager
3354 College Road
Fairbanks, AK 99709-3707
USA

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

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

Why was the data set created?

This project is a part of a multi-year program focusing on improving Alaska's publicly-available geological and geochemical data and assessing the mineral potential of the less-explored regions of Alaska.

How was the data set created?

From what previous works were the data drawn?
How were the data generated, processed, and modified?

Date: 2015 (process 1 of 6)
Sample collection - 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 meta-igneous 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 randomly collected at a location. However, a few samples are 'select' samples, which were deliberately collected from a specific feature, as noted in the sample field description.

Date: 2015 (process 2 of 6)
Sample preparation - Rock samples were processed by ALS Minerals using their PREP-31 package. The samples were crushed to better than 70 percent passing 2 mm, and a 250 g split was pulverized to better 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: 2015 (process 3 of 6)
Magnetic susceptibility measurements - Magnetic susceptibility measurements were collected using Terraplus KT 5, 6, 9, and 10 model handheld magnetic susceptibility meters. The values reported here are the average of four individual measurements performed on representative surfaces of the sampled rock outcrop.

Date: 2015 (process 4 of 6)
Major- and trace-element compositions - Major- and trace-element including rare-earth element compositions for rock samples were determined by ALS Minerals method ME-ICP61r: Four-acid digestion followed by inductively-coupled plasma-atomic emission spectrometry (ICP-AES) and inductively-coupled plasma-mass spectroscopy (ICP-MS). Samples that exceeded detection limits for elements of interest were reanalyzed using specific elemental tests. Over-limit values for Cu were reanalyzed using four-acid digestion and ICP-AES (ALS Minerals procedure ME-OG62).

Date: 2015 (process 5 of 6)
Platinum, palladium, and gold values - Platinum, palladium, and gold values were analyzed by 30 gram fire assay with ICP-MS finish (ALS Minerals method PGM-MS23).

Date: 2015 (process 6 of 6)
Whole-rock geochemistry, major and minor oxides - major and minor oxides were analyzed by lithium metaborate fusion digestion and ICP-AES (ALS Minerals method ME-ICP06). Trace elements, including rare-earth elements, were determined using lithium metaborate fusion digestion and ICP-MS (ALS Minerals method ME-MS81). Ag, Cd, Co, Cu, Li, Mo, Ni, Pb, Sc, and Zn were determined by four-acid digestion and ICP-AES (ALS Minerals 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 Minerals method ME-MS42). Total C and S were analyzed by LECO furnace (ALS Minerals method C-IR07 and S-IR08, respectively).
What similar or related data should the user be aware of?
Burns, L.E., CGG, and Fugro GeoServices, Inc., 2014, Wrangellia survey area: Airborne magnetic and electromagnetic data in line (point), grid, vector, and map formats, Talkeetna Mountains, Healy, and Mt. Hayes quadrangles, south-central Alaska: Geophysical Report GPR 2014-1, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.
Online Links:
- <http://dx.doi.org/10.14509/27022>
Other_Citation_Details: 56 sheets, 1 DVD, scale 1:63,360
Csejtey, Bela, Jr., Nelson, W.H., Jones, D.L., Silberling, N.J., Dean, R.M., Morris, M.S., Lanphere, M.A., Smith, J.G., and Silberman, M.L., 1978, Reconnaissance geologic map and geochronology, Talkeetna Mountains Quadrangle, northern part of Anchorage Quadrangle, and southwest corner of Healy Quadrangle, Alaska: Open-File Report OF 78-558-A, U.S. Geological Survey, United States.
Online Links:
- <http://dggs.alaska.gov/pubs/id/12425>
Other_Citation_Details: 60 p., 1 sheet, scale 1:250,000
Schmidt, J.M., Werdon, M.B., and Wardlaw, Bruce, 2003, New mapping near Iron Creek, Talkeetna Mountains, indicates presence of Nikolai greenstone: Professional Report PR 120J, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.
Online Links:
- <http://dx.doi.org/10.14509/2917>
Other_Citation_Details: p. 101-108
Twelker, Evan, Bachmann, E.N., Freeman, L.K., Newberry, R.J., Reioux, D.A., Sicard, K.R., Tuzzolino, A.L., Wright, T.C., and Wypych, Alicja, 2014, Major-oxide, minor-oxide, and trace-element geochemical data from rocks and stream sediments in the Wrangellia mineral assessment area, Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles, Alaska: Raw Data File RDF 2014-3, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.
Online Links:
- <http://dx.doi.org/10.14509/27181>
Other_Citation_Details: 6 p
Twelker, Evan, Hubbard, T.D., Wypych, Alicja, Sicard, K.R., Newberry, R.J., Reioux, D.A., Freeman, L.K., and Lande, L.L., 2015, Geologic map of the Talkeetna Mountains C-4 Quadrangle and adjoining areas, central Alaska: Preliminary Interpretive Report PIR 2015-6, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.
Online Links:
- <http://dx.doi.org/10.14509/29470>
Other_Citation_Details: 16 p., 1 sheet, scale 1:50,000
Werdon, M.B., Azain, J.S., and Granitto, Matthew, 2014, Reanalysis of historical U.S. Geological Survey sediment samples for geochemical data from the western part of the Wrangellia terrane, Anchorage, Gulkana, Healy, Mt. Hayes, Nabesna, and Talkeetna Mountains quadrangles, Alaska: Raw Data File RDF 2014-5, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.
Online Links:
- <http://dx.doi.org/10.14509/27287>
Other_Citation_Details: 6 p
Werdon, M.B., Riehle, J.R., Schmidt, J.M., Newberry, R.J., and Pessel, G.H., 2002, Geologic map of the Iron Creek area, Talkeetna Mountains B-5 Quadrangle, Alaska: Preliminary Interpretive Report PIR 2002-4, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.
Online Links:
- <http://dx.doi.org/10.14509/7144>
Other_Citation_Details: 1 sheet, scale 1:63,360
Wypych, Alicja, Twelker, Evan, Freeman, L.K., Lande, Lauren, Newberry, R.J., Reioux, D.A., and Sicard, K.R., 2014, Major-oxide and trace-element geochemical data from rocks collected in 2014 in the Wrangellia mineral assessment area, Talkeetna Mountains C-4, C-3, and B-4 quadrangles, Alaska: Raw Data File RDF 2014-22, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.
Online Links:
- <http://dx.doi.org/10.14509/29140>
Other_Citation_Details: 4 p

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

How well have the observations been checked?
Coordinates of modern sample locations were determined by the geologists in the field using using Trimble Juno T41/5 WAAS-enabled GPS devices running ArcGIS for Windows Mobile. Eight legacy samples from the Caribou Dome (also known as Denali Copper) underground workings were obtained from the University of Alaska Fairbanks collection; the locations provided for these samples are visual approximations. 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 Minerals' 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.
How accurate are the geographic locations?
Location data for modern samples were collected using Trimble Juno T41/5 WAAS-enabled GPS devices running ArcGIS for Windows Mobile. Data were merged into an ArcGIS geodatabase. WAAS-enabled GPS devices have a reported error of about 1 m. Latitude and longitude are reported in the WGS84 datum. Eight samples from the Caribou Dome (also known as Denali Copper) underground workings were obtained from the University of Alaska Fairbanks collection; the locations provided for these samples are visual approximations.
How accurate are the heights or depths?
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.
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.

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.
What's the catalog number I need to order this data set?
RDF 2015-16
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.
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/10.14509/29518>
- Cost to order the data: Free download

Who wrote the metadata?

Dates:

Last modified: 23-Oct-2015

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>

Generated by mp version 2.9.21 on Fri Oct 23 14:44:05 2015

Data format:	ASCII tabular files
Network links:	<http://dx.doi.org/10.14509/29518>