Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Zane Hills pluton, northwestern Alaska

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?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  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?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

   Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Zane Hills pluton, northwestern Alaska: Raw Data File RDF 2014-11, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://dx.doi.org/10.14509/27296>

   Other_Citation_Details: 4 p.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -156.418

   East_Bounding_Coordinate: -155.632

   North_Bounding_Coordinate: 66.4038

   South_Bounding_Coordinate: 66.1888

3. What does it look like?

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

   Beginning_Date: 2013

   Ending_Date: 2014

   Currentness_Reference: ground condition

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

   Geospatial_Data_Presentation_Form: digital-data, report

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 0.0001. Longitudes are given to the nearest 0.0001. Latitude and longitude values are specified in decimal degrees.

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.9786982.
      

7. How does the data set describe geographic features?

   rdf2014-11-border.shp

   A polygon that encompasses the maximum geographic extent of the data observations (Source: Alaska Division of Geological & Geophysical Surveys)

   rdf2014-11-trace-element-ree.csv, rdf2014-11-trace-element-ree-limits.csv

   Table with modern analyses of historic samples for geochemical trace-elements and rare-earth-elements and a table of analytical detection limits for each element. (Source: Alaska Division of Geological & Geophysical Surveys)

   SAMPLE

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

   Sample numbers were generated by USBM staff at the time of publication. Users should consult the originating report for additional information about the sample numbering protocols.

   LONGITUDE

   Longitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	-156.418
   Maximum:	-155.632
   Units:	decimal degrees

   LATITUDE

   Latitude, NAD27 (Source: Alaska Division of Geological & Geophysical Surveys)

   Range of values
   Minimum:	66.1888
   Maximum:	66.4038
   Units:	decimal degrees

   BATCH_NUMBER

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

   The batch numbers assigned by the lab for these results are: FA12138644, FA12138953, and FA12288393

   SAMPLE_MATERIAL

   Sample media of the original USBM sample. These values where obtained from the originating report. In some cases the originating sample type was not explicitly noted but could be reasonably interpreted from the broader context of the report. (Source: United States Bureau of Mines staff)

   Value	Definition
   pan concentrate	The sample was acquired from a streambed accumulation of sand, gravel, or other alluvial material that was subsequently concentrated by screening followed by hand panning the undersize portion.
   rock	The sample was collected from rock chips obtained from outcrops or isolated rocks (float) believed to represent underlying bedrock.

   WEIGHT_KG

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

   Value	Definition
   NULL	received sample weight was less than 0.02 kilograms

   Range of values
   Minimum:	0.003
   Maximum:	0.08
   Units:	kilograms

   REMARKS

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

   Characters 1 to 254 of a brief description.

   REFERENCE

   Reference to the originating USBM report (Source: Alaska Division of Geological & Geophysical Surveys)

   Value	Definition
   Barker, J.C., 1991	Barker, J.C., 1991, Investigations of rare-earth and associated elements, Zane Hills pluton, northwestern Alaska: U.S. Bureau of Mines Open-File Report 36-91, 33 p.

   Ag_ppm_1

   Silver values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl Digestion, HCl Leach; 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.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	0.6
   Maximum:	6.2
   Units:	parts per million

   Ag_ppm_2

   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)

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

   Range of values
   Minimum:	0.06
   Maximum:	1.24
   Units:	parts per million

   Al_pct_1

   Aluminum values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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)

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

   Range of values
   Minimum:	3.32
   Maximum:	9.89
   Units:	percent

   Al_pct_2

   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)

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

   Range of values
   Minimum:	1.12
   Maximum:	8.77
   Units:	percent

   As_ppm_1

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

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	5
   Maximum:	647
   Units:	parts per million

   As_ppm_2

   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)

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	1.6
   Maximum:	12.9
   Units:	parts per million

   Au_ppm_1

   Gold values measured in parts per million (ppm); Method: Fire Assay - Gravimetric (FA-GRAV), 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
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	177.5
   Maximum:	177.5
   Units:	parts per million

   Au_ppm_2

   Gold values measured in parts per million (ppm); Method: Fire Assay - Inductively Coupled Plasma - Atomic Emission Spectroscopy (FA-ICP-AES); Lower detection limit = 0.001 ppm; Upper detection limit = 10 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.
   -2	Above detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	0.001
   Maximum:	0.086
   Units:	parts per million

   Ba_ppm_1

   Barium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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)

   Value	Definition
   -2	Above detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	100
   Maximum:	9480
   Units:	parts per million

   Ba_ppm_2

   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)

   Value	Definition
   -2	Above detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	110
   Maximum:	980
   Units:	parts per million

   Ba_ppm_3

   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)

   Value	Definition
   -2	Above detection limit.

   Range of values
   Minimum:	102.5
   Maximum:	9870
   Units:	parts per million

   Be_ppm_1

   Beryllium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl Digestion, HCl Leach; 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
   -2	Above detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	1.6
   Maximum:	863
   Units:	parts per million

   Be_ppm_2

   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)

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

   Range of values
   Minimum:	0.45
   Maximum:	71.3
   Units:	parts per million

   Bi_ppm_1

   Bismuth values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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)

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	2
   Maximum:	929
   Units:	parts per million

   Bi_ppm_2

   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)

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

   Range of values
   Minimum:	0.37
   Maximum:	4.47
   Units:	parts per million

   Ca_pct_1

   Calcium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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)

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

   Range of values
   Minimum:	0.2
   Maximum:	5.08
   Units:	percent

   Ca_pct_2

   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)

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

   Range of values
   Minimum:	0.35
   Maximum:	4.86
   Units:	percent

   Cd_ppm_1

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

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	0.5
   Maximum:	1.9
   Units:	parts per million

   Cd_ppm_2

   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)

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

   Range of values
   Minimum:	0.05
   Maximum:	1.83
   Units:	parts per million

   Ce_ppm_1

   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)

   Value	Definition
   -2	Above detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	140.5
   Maximum:	490
   Units:	parts per million

   Ce_ppm_2

   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)

   Range of values
   Minimum:	56.5
   Maximum:	2020
   Units:	parts per million

   Co_ppm_1

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

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	1
   Maximum:	57
   Units:	parts per million

   Co_ppm_2

   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)

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

   Range of values
   Minimum:	2.2
   Maximum:	41.7
   Units:	parts per million

   Cr_ppm_1

   Chromium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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)

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

   Range of values
   Minimum:	3
   Maximum:	1790
   Units:	parts per million

   Cr_ppm_2

   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)

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

   Range of values
   Minimum:	34
   Maximum:	2180
   Units:	parts per million

   Cr_ppm_3

   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)

   Range of values
   Minimum:	10
   Maximum:	2860
   Units:	parts per million

   Cs_ppm_1

   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)

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

   Range of values
   Minimum:	0.89
   Maximum:	11.7
   Units:	parts per million

   Cs_ppm_2

   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)

   Range of values
   Minimum:	0.87
   Maximum:	29.9
   Units:	parts per million

   Cu_ppm_1

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

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

   Range of values
   Minimum:	3
   Maximum:	717
   Units:	parts per million

   Cu_ppm_2

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

   Range of values
   Minimum:	4.3
   Maximum:	1120
   Units:	parts per million

   Dy_ppm

   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)

   Range of values
   Minimum:	1.8
   Maximum:	636
   Units:	parts per million

   Er_ppm

   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)

   Range of values
   Minimum:	1.06
   Maximum:	309
   Units:	parts per million

   Eu_ppm

   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)

   Range of values
   Minimum:	0.56
   Maximum:	151.5
   Units:	parts per million

   Fe_pct_1

   Iron values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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)

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

   Range of values
   Minimum:	1.37
   Maximum:	31.5
   Units:	percent

   Fe_pct_2

   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)

   Value	Definition
   -2	Above detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	2.02
   Maximum:	45.3
   Units:	percent

   Ga_ppm_1

   Gallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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)

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	10
   Maximum:	30
   Units:	parts per million

   Ga_ppm_2

   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)

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

   Range of values
   Minimum:	16.55
   Maximum:	34.6
   Units:	parts per million

   Ga_ppm_3

   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:	13.2
   Maximum:	39.4
   Units:	parts per million

   Gd_ppm

   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)

   Range of values
   Minimum:	2.57
   Maximum:	635
   Units:	parts per million

   Ge_ppm

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

   Range of values
   Minimum:	0.2
   Maximum:	1.93
   Units:	parts per million

   Hf_ppm_1

   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)

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

   Range of values
   Minimum:	3.8
   Maximum:	46.3
   Units:	parts per million

   Hf_ppm_2

   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)

   Range of values
   Minimum:	1.9
   Maximum:	369
   Units:	parts per million

   Ho_ppm

   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)

   Range of values
   Minimum:	0.35
   Maximum:	115.5
   Units:	parts per million

   In_ppm

   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)

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

   Range of values
   Minimum:	0.029
   Maximum:	0.345
   Units:	parts per million

   K_pct_1

   Potassium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	0.81
   Maximum:	5.22
   Units:	percent

   K_pct_2

   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)

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

   Range of values
   Minimum:	0.26
   Maximum:	5.36
   Units:	percent

   La_ppm_1

   Lanthanum values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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)

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

   Range of values
   Minimum:	20
   Maximum:	860
   Units:	parts per million

   La_ppm_2

   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)

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

   Range of values
   Minimum:	55.2
   Maximum:	610
   Units:	parts per million

   La_ppm_3

   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)

   Range of values
   Minimum:	24
   Maximum:	737
   Units:	parts per million

   Li_ppm

   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)

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

   Range of values
   Minimum:	3
   Maximum:	10.4
   Units:	parts per million

   Lu_ppm

   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)

   Range of values
   Minimum:	0.17
   Maximum:	23.8
   Units:	parts per million

   Mg_pct_1

   Magnesium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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)

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

   Range of values
   Minimum:	0.08
   Maximum:	4.25
   Units:	percent

   Mg_pct_2

   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)

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

   Range of values
   Minimum:	0.19
   Maximum:	2.24
   Units:	percent

   Mn_ppm_1

   Manganese values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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)

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

   Range of values
   Minimum:	147
   Maximum:	2070
   Units:	parts per million

   Mn_ppm_2

   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)

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

   Range of values
   Minimum:	233
   Maximum:	2340
   Units:	parts per million

   Mo_ppm_1

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

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	1
   Maximum:	37
   Units:	parts per million

   Mo_ppm_2

   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)

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

   Range of values
   Minimum:	0.38
   Maximum:	55
   Units:	parts per million

   Na_pct_1

   Sodium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	0.06
   Maximum:	4.85
   Units:	percent

   Na_pct_2

   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)

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

   Range of values
   Minimum:	0.12
   Maximum:	4.52
   Units:	percent

   Nb_ppm_1

   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)

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

   Range of values
   Minimum:	62.6
   Maximum:	202
   Units:	parts per million

   Nb_ppm_2

   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)

   Range of values
   Minimum:	5
   Maximum:	381
   Units:	parts per million

   Nd_ppm

   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:	27.9
   Maximum:	1030
   Units:	parts per million

   Ni_ppm_1

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

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	1
   Maximum:	105
   Units:	parts per million

   Ni_ppm_2

   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)

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

   Range of values
   Minimum:	4.1
   Maximum:	57.6
   Units:	parts per million

   P_ppm_1

   Phosphorus values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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)

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

   Range of values
   Minimum:	100
   Maximum:	6640
   Units:	parts per million

   P_ppm_2

   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)

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

   Range of values
   Minimum:	160
   Maximum:	4050
   Units:	parts per million

   Pb_ppm_1

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

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

   Range of values
   Minimum:	16
   Maximum:	992
   Units:	parts per million

   Pb_ppm_2

   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)

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

   Range of values
   Minimum:	13.2
   Maximum:	339
   Units:	parts per million

   Pd_ppm

   Palladium values measured in parts per million (ppm); Method: Fire Assay - Inductively Coupled Plasma - Atomic Emission Spectroscopy (FA-ICP-AES); Lower detection limit = 0.001 ppm; Upper detection limit = 10 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	0.001
   Maximum:	0.074
   Units:	parts per million

   Pr_ppm

   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:	9.3
   Maximum:	224
   Units:	parts per million

   Pt_ppm

   Platinum values measured in parts per million (ppm); Method: Fire Assay - Inductively Coupled Plasma - Atomic Emission Spectroscopy (FA-ICP-AES); Lower detection limit = 0.005 ppm; Upper detection limit = 10 ppm; Detection limits indicate the minimum and maximum concentrations that can be accurately determined. (Source: ALS Minerals)

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	0.007
   Maximum:	8.84
   Units:	parts per million

   Rb_ppm_1

   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)

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

   Range of values
   Minimum:	11.6
   Maximum:	356
   Units:	parts per million

   Rb_ppm_2

   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:	11.6
   Maximum:	415
   Units:	parts per million

   Re_ppm

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

   Range of values
   Minimum:	0.002
   Maximum:	0.015
   Units:	parts per million

   S_pct_1

   Sulfur values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	0.01
   Maximum:	5.14
   Units:	percent

   S_pct_2

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

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

   Sb_ppm_1

   Antimony values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl Digestion, HCl Leach; 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)

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	5
   Maximum:	16
   Units:	parts per million

   Sb_ppm_2

   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)

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

   Range of values
   Minimum:	0.52
   Maximum:	5.41
   Units:	parts per million

   Sc_ppm_1

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

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

   Range of values
   Minimum:	1
   Maximum:	178
   Units:	parts per million

   Sc_ppm_2

   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)

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

   Range of values
   Minimum:	2.6
   Maximum:	128.5
   Units:	parts per million

   Se_ppm

   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)

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	3
   Maximum:	19
   Units:	parts per million

   Sm_ppm

   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)

   Range of values
   Minimum:	4
   Maximum:	690
   Units:	parts per million

   Sn_ppm_1

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

   Range of values
   Minimum:	1.4
   Maximum:	12.3
   Units:	parts per million

   Sn_ppm_2

   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)

   Range of values
   Minimum:	1
   Maximum:	25
   Units:	parts per million

   Sr_ppm_1

   Strontium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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)

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

   Range of values
   Minimum:	89
   Maximum:	1850
   Units:	parts per million

   Sr_ppm_2

   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)

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

   Range of values
   Minimum:	69.5
   Maximum:	680
   Units:	parts per million

   Sr_ppm_3

   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:	73.3
   Maximum:	2360
   Units:	parts per million

   Ta_ppm_1

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

   Range of values
   Minimum:	0.46
   Maximum:	16.6
   Units:	parts per million

   Ta_ppm_2

   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)

   Range of values
   Minimum:	0.1
   Maximum:	18.9
   Units:	parts per million

   Tb_ppm

   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)

   Range of values
   Minimum:	0.35
   Maximum:	115.5
   Units:	parts per million

   Te_ppm

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

   Range of values
   Minimum:	0.07
   Maximum:	0.13
   Units:	parts per million

   Th_ppm_1

   Thorium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl Digestion, HCl Leach; Lower detection limit = 20 ppm; Upper detection limit = 10000 ppm; 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:	20
   Maximum:	4540
   Units:	parts per million

   Th_ppm_2

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

   Range of values
   Minimum:	86.7
   Maximum:	2210
   Units:	parts per million

   Th_ppm_3

   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
   -2	Above detection limit.

   Range of values
   Minimum:	24.4
   Maximum:	982
   Units:	parts per million

   Ti_pct_1

   Titanium values measured in percent (pct); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	0.09
   Maximum:	1.57
   Units:	percent

   Ti_pct_2

   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)

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

   Range of values
   Minimum:	0.098
   Maximum:	1.21
   Units:	percent

   Tl_ppm_1

   Thallium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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)

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

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

   Tl_ppm_2

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

   Range of values
   Minimum:	0.1
   Maximum:	3.08
   Units:	parts per million

   Tl_ppm_3

   Thallium 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 = 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:	3.1
   Units:	parts per million

   Tm_ppm

   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)

   Range of values
   Minimum:	0.18
   Maximum:	37.3
   Units:	parts per million

   U_ppm_1

   Uranium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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)

   Value	Definition
   -1	Below detection limit.
   -2	Above detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	10
   Maximum:	1070
   Units:	parts per million

   U_ppm_2

   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)

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

   Range of values
   Minimum:	13
   Maximum:	438
   Units:	parts per million

   U_ppm_3

   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
   -2	Above detection limit.

   Range of values
   Minimum:	4.07
   Maximum:	590
   Units:	parts per million

   V_ppm_1

   Vanadium values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), HNO3 -HClO4 -HF-HCl 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)

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

   Range of values
   Minimum:	13
   Maximum:	1190
   Units:	parts per million

   V_ppm_2

   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)

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

   Range of values
   Minimum:	24
   Maximum:	969
   Units:	parts per million

   V_ppm_3

   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:	11
   Maximum:	1575
   Units:	parts per million

   W_ppm_1

   Tungsten values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), 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)

   Value	Definition
   -1	Below detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	10
   Maximum:	900
   Units:	parts per million

   W_ppm_2

   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)

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

   Range of values
   Minimum:	2.9
   Maximum:	1240
   Units:	parts per million

   W_ppm_3

   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:	1615
   Units:	parts per million

   Y_ppm_1

   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)

   Value	Definition
   -2	Above detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	36.2
   Maximum:	237
   Units:	parts per million

   Y_ppm_2

   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)

   Range of values
   Minimum:	11.1
   Maximum:	3860
   Units:	parts per million

   Yb_ppm

   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:	1.08
   Maximum:	178
   Units:	parts per million

   Zn_ppm_1

   Zinc values measured in parts per million (ppm); Method: Inductively Coupled Plasma - Atomic Emission Spectroscopy (ICP-AES), 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)

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

   Range of values
   Minimum:	21
   Maximum:	263
   Units:	parts per million

   Zn_ppm_2

   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)

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

   Range of values
   Minimum:	18
   Maximum:	294
   Units:	parts per million

   Zr_ppm_1

   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)

   Value	Definition
   -2	Above detection limit.
   NULL	Blank (NULL) field values indicate that this chemical species was not requested or not analyzed.

   Range of values
   Minimum:	99.5
   Maximum:	298
   Units:	parts per million

   Zr_ppm_2

   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)

   Value	Definition
   -2	Above detection limit.

   Range of values
   Minimum:	50
   Maximum:	8560
   Units:	parts per million

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Werdon, M.B.
   • Blessington, M.J.

2. Who also contributed to the data set?

   This work was a component of the State of Alaska's Strategic and Critical Minerals Assessment project, a state-funded Capital Improvement Project, is designed to evaluate Alaska's statewide potential for SCM resources. Historic USBM sample materials were retrieved by DGGS from the DGGS Geologic Materials Center, where the USBM samples were transferred as part of the federally funded Minerals Data and Information Rescue in Alaska (MDIRA) program in the late 1990s and early 2000s.

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

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

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

Why was the data set created?

The State of Alaska's Strategic and Critical Minerals (SCM) Assessment project, a state-funded Capital Improvement Project (CIP), designed to evaluate Alaska's statewide potential for SCM resources. The SCM Assessment project is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. For the geochemical part of the SCM Assessment project, thousands of historic geochemical samples from the DGGS, U.S. Geological Survey, and U.S. Bureau of Mines (USBM) archives are being re-analyzed by DGGS using modern, quantitative, geochemical-analytical methods. The objective is to update the State of Alaska's statewide digital geochemical database in order to more clearly identify areas with SCM potential.

How was the data set created?

1. From what previous works were the data drawn?

   Barker, J.C., 1991 (source 1 of 1)

   Barker, J.C., 1991, Investigations of rare-earth and associated elements, Zane Hills pluton, northwestern Alaska: Open-File Report OFR 36-91, U.S. Bureau of Mines, United States.

   Online Links:

   • <http://www.dggs.alaska.gov/pubs/id/21393>

   Other_Citation_Details: 33 p

   Type_of_Source_Media: paper

   Source_Contribution: sample selection and location coordinate identification

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

   Date: 2013 (process 1 of 7)

   Sample selection and location coordinate identification - This report and digital data release presents 40 new geochemical analyses on historic U.S. Bureau of Mines (USBM) samples, including 33 rock and 7 heavy mineral concentrate (pan concentrate) samples. These samples were originally collected by the USBM as part of their critical and strategic minerals project, which investigated the rare-earth-element and uranium mineral potential of the Zane Hills area, northwestern Alaska. These historic USBM sample materials were retrieved by DGGS from the DGGS Geologic Materials Center (GMC), where the USBM samples were transferred as part of the federally funded Minerals Data and Information Rescue in Alaska (MDIRA) program in the late 1990s and early 2000s. Location data for each sample were derived by DGGS staff by scanning station-location map figures from USBM reports, georegistering the map figures in ArcGIS v. 10.1, creating a point layer of station locations, and extracting latitude-longitude coordinates. Location data for each sample are presented in latitude and longitude coordinates in decimal degrees with NAD27 datum and Clarke 1866 spheroid.

   Data sources used in this process:

   • Barker, J.C., 1991

   Date: 2013 (process 2 of 7)

   Sample preparation - Sample pulps were retrieved from the GMC, examined, and split by DGGS staff into aliquots needed for the analyses, with leftover portions of the pulps saved and stored at the GMC. Splits of pulps were submitted to ALS Minerals Laboratories (ALS) for analysis. Where pulps were unavailable, coarse-reject material was prepped by ALS using method PUL-31: pulverize split to 85 percent less than 75 microns. Coarse-reject samples were pulverized at ALS using "flying disk" or "ring and puck" style, low chrome, steel grinding mills. A sample split or total sample up to 250 g is pulverized, with 85 percent of the resulting material passing through a screen of 75 microns.

   Date: 2013 (process 3 of 7)

   Method ME-MS81 38-element, fusion, ICP-MS - For all samples, trace elements, including rare-earth elements, were determined using lithium metaborate fusion digestion and ICP-MS (ALS Minerals method ME-MS81). A prepared sample (0.200 g) is added to lithium metaborate flux (0.90 g), mixed well and fused in a furnace at 1,000°C. The resulting melt is then cooled and dissolved in 100 mL of 4% HNO3 / 2% HCl3 solution. This solution is then analyzed by inductively coupled plasma-mass spectrometry (ICP-MS). Note: Some base-metal oxides and sulfides may not be completely decomposed by the lithium borate fusion. Results for Ag, Co, Cu, Mo, Ni, Pb, and Zn will not likely be quantitative by this method.

   Date: 2013 (process 4 of 7)

   Method ME-ICP61 33-element, 4-acid, ICP-AES - A prepared sample (0.25 g) is digested with perchloric, nitric, hydrofluoric, and hydrochloric acids. The residue is topped up with dilute hydrochloric acid and the resulting solution is analyzed by inductively coupled plasma-atomic emission spectrometry (ICP-AES). Results are corrected for spectral inter-element interferences. Note: Four-acid digestions are able to dissolve most minerals, however, although the term "near total" is used, depending on the sample matrix, not all elements may be quantitatively extracted.

   Date: 2013 (process 5 of 7)

   Method ME-MS61 48-element, 4-acid, ICP-AES or ICP-MS - A prepared sample (0.25 g) is digested with perchloric, nitric, hydrofluoric, and hydrochloric acids. The residue is topped up with dilute hydrochloric acid and the resulting solution is analyzed by inductively coupled plasma-atomic emission spectrometry (ICP-AES). Results are corrected for spectral inter-element interferences. Note: Four-acid digestions are able to dissolve most minerals, however, although the term "near total" is used, depending on the sample matrix, not all elements may be quantitatively extracted.

   Date: 2013 (process 6 of 7)

   Method PGM-ICP23 Pt, Pd, Au, 30-gram, FA-ICP-AES - Gold (Au), platinum (Pt), and palladium (Pd) values were obtained from a prepared, 30 g sample, fused with a mixture of lead oxide, sodium carbonate, borax, and silica, inquarted with 6 mg of gold-free silver, and then cupelled to yield a precious-metal bead. The bead is digested for 2 minutes at high power by microwave in dilute nitric acid. The solution is cooled and hydrochloric acid is added. The solution is digested for an additional 2 minutes at half power by microwave. The digested solution is then cooled, diluted to 4 mL with 2% hydrochloric acid, homogenized, and then analyzed for gold, platinum, and palladium by inductively coupled plasma-atomic emission spectrometry (ICP-AES).

   Date: 2013 (process 7 of 7)

   Method Au-GRAV21-Au, 30-g, FA - Samples with silver (Ag) above the detection limits in analytical method ME-OG62 described above were re-analyzed using method Ag-GRAV21. A prepared, 30 g sample is fused with a mixture of lead oxide, sodium carbonate, borax, silica, and other reagents in order to produce a lead button. The lead button containing the precious metals is cupelled to remove the lead. The remaining gold and silver bead is parted in dilute nitric acid, annealed, and weighed as gold. Silver is then determined by the difference in weights.

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

   Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Circle mining district, western Crazy Mountains, and the Lime Peak area of the White Mountains, Circle Quadrangle, east-central Alaska: Raw Data File RDF 2014-7, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://dx.doi.org/10.14509/27292>

   Other_Citation_Details: 4 p

   Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from tin occurrences associated with the Ohio Creek pluton, south-central Alaska: Raw Data File RDF 2014-8, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://dx.doi.org/10.14509/27293>

   Other_Citation_Details: 4 p

   Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Darby Mountains, Seward Peninsula, Alaska: Raw Data File RDF 2014-9, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://dx.doi.org/10.14509/27294>

   Other_Citation_Details: 4 p

   Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Selawik Hills, northwestern Alaska: Raw Data File RDF 2014-10, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://dx.doi.org/10.14509/27295>

   Other_Citation_Details: 4 p

   Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Ray River watershed, and Kanuti and Hodzana rivers uplands, central Alaska: Raw Data File RDF 2014-12, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://dx.doi.org/10.14509/27297>

   Other_Citation_Details: 4 p

   Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the Porcupine River drainage, northeastern Alaska: Raw Data File RDF 2014-13, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://dx.doi.org/10.14509/27298>

   Other_Citation_Details: 4 p

   Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from the VABM Bend area, Charley River and Eagle quadrangles, east-central Alaska: Raw Data File RDF 2014-14, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://dx.doi.org/10.14509/27299>

   Other_Citation_Details: 4 p

   Werdon, M.B., and Blessington, M.J., 2014, Analyses of historic U.S. Bureau of Mines samples for geochemical trace-element and rare-earth-element data from Kook Lake, Sitka Quadrangle, Alaska: Raw Data File RDF 2014-15, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

   Online Links:

   • <http://dx.doi.org/10.14509/27300>

   Other_Citation_Details: 4 p

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

1. How well have the observations been checked?

   Analytical results obtained from samples submitted to geochemical laboratories must pass through two levels of data validation. The first level of quality control checks occurs at ALS, which is accredited to ISO/IEC 17025-2005 standards. The laboratory's quality control protocol is to insert a reagent blank and a reference sample material with every batch of 20 samples to measure the analytical accuracy. Duplicate samples are analyzed at the end of the sample set to measure analytical variance as well as sample variance. Data passing the quality control criteria are sent to DGGS. The second level of data validation is performed by DGGS. All samples submitted to ALS are accompanied by a variety of DGGS in-house, ore-geochemical reference samples (blinds) submitted at the rate of 1, or occasionally more than 1, per sample batch. Upon receipt of analyses from the lab, reference standards are checked by DGGS against their accepted values. If present, any batches with reference standards with elemental values falling outside 2 standard deviations of their accepted values were submitted to the lab to be reanalyzed. For each sample, data tables either contain assay values, or they contain coded-value place holders (that is, null = not analyzed; -1 = the element's assay result is less than the lower detection limit for the method; -2 = the element's assay result is greater than the upper detection limit for the method). We provide detection limits and, when available, the method documentation provided to us by the lab. Users should contact the originating lab for additional information about detection limits and reporting procedures. We obtained geographic coordinates and the original sample material from the originating literature. We also note the type of sample material that was obtained from the archive and sent to the lab. The reported sample weights were measured by DGGS staff and are considered to be more accurate than the weight values listed on the ALS Certificate of Assay. Samples were sent to ALS in multiple batches and the method used varies between batches. In some cases, the method used may not provide quantitative results for all elements. The analyses presented in this publication were generated as a component of a broader project in which five batches of samples were sent to ALS. In a few cases samples were reanalyzed using several different methods, consequently, each analysis is uniquely identified by the combination of sample number + laboratory batch number.

2. How accurate are the geographic locations?

   Location data for each sample were derived by DGGS staff by scanning station-location map figures from USBM reports, georegistering the map figures in ArcGIS v. 10.1, creating a point layer of station locations, and extracting latitude-longitude coordinates. Although ArcGIS can provide precise location coordinates, users should consider both possible errors intrinsic to how the historic locations were originally collected as well as error inherent in scanning and digitizing locations from a printed map. Location data for each sample are presented in latitude and longitude coordinates in decimal degrees with NAD27 datum and Clarke 1866 spheroid.

3. How accurate are the heights or depths?

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

   This dataset is complete.

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

   not applicable

How can someone get a copy of the data set?

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

Access_Constraints:

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

Use_Constraints:

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

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

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

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

   Contact_Instructions:

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

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

   RDF 2014-11

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/10.14509/27296>

   • Cost to order the data: Free download

Who wrote the metadata?

Dates:

Last modified: 22-Aug-2014

Metadata author:

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

(907)451-5020 (voice)

Metadata standard:

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

Metadata extensions used:

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