Bradley S. Van Gosen
Cliff D. Taylor
20171018
Geochemical analyses of rock samples collected from mineral deposits and intrusions of the Bokan Mountain peralkaline granitic complex, Prince of Wales Island, southeastern Alaska
tabular digital data, a CSV format file, a TXT format file, a GIS data set
Denver, CO
U.S. Geological Survey
http://dx.doi.org/10.5066/F7KD1WVC
This data set compiles the major and trace element chemistry of rock samples collected by the U.S. Geological Survey (USGS) at Bokan Mountain, located in the southern part of Prince of Wales Island, southeastern Alaska. Bokan Mountain was formed by an Early Jurassic peralkaline igneous complex that intruded into lower Paleozoic rocks of the Alexander terrane of southeast Alaska. The pluton and surrounding country rocks host numerous mineral deposits and occurrences, including heavy rare earth element (HREE)-rich pegmatites and felsic dikes, as well as mineral deposits rich in uranium, thorium, HREE, and fluorine. The Ross-Adams mine on Bokan Mountain exploited a uranium-thorium deposit intermittently from the late 1950s to 1971, and remains the only uranium producer in Alaska. Recent exploration by Ucore Rare Metals Inc. (http://ucore.com/) at Bokan Mountain has focused on the Dotson and I and L Zones, which together form a 2.5-km-long, 50 m-wide zone of thin felsic dikes and pegmatites (each rarely more than 2-m-wide) that are enriched in rare earth elements (REE). Ucore Rare Metals has reported an inferred resource for the combined zones as 5.275 million metric tons of ore at 0.654 percent total REE oxides, using a cutoff of 0.4 percent total REE oxides; about 40 percent of the total REE oxides in these dikes and pegmatites are the HREE (http://ucore.com/Ucore_43-101.pdf).
This data release provides the analytical results of 153 rock hand samples collected by USGS geologists during site visits to Bokan Mountain in 2010, 2011, and field studies during 2014. The samples represent a variety of rock types associated with the Bokan Mountain igneous complex, including mineral deposits, prospects and occurrences, along with examples of unaltered intrusions of the pluton. The samples were analyzed for 55 major and trace elements using inductively coupled plasma-atomic emission spectrometry (ICP-AES) and inductively coupled plasma-mass spectrometry (ICP-MS) and also analyzed for major elements using wavelength dispersive x-ray fluorescence spectrometry (WDXRF). This data set is provided for future use in geologic, exploration, and environmental background studies of Bokan Mountain and its mineral deposits.
This data set is a compilation of geochemical data from analyses of rock samples collected by the U.S. Geological Survey from mineralized and unmineralized rock of the Early Jurassic-age Bokan Mountain peralkaline granitic complex on Prince of Wales Island, southeastern Alaska. This pluton contains a variety of mineral deposits, exploration prospects, and mineral occurrences, with enrichments in the rare earth elements, thorium, and uranium. This data set is provided to help facilitate geologic mapping, petrologic studies, mineral resource assessments, the determination of geochemical baseline values and statistics, and environmental impact assessments related to the potential development of its mineral resources, in addition to geologic studies of many purposes.
References cited in the attribute "References" provide geologic context and additional descriptions on the geologic feature represented by the hand sample. The references cited are listed in the accompanying file "References_Bokan_Mountain_Alaska.txt", and are also listed here:
Barker, J.C., and Van Gosen, B.S., 2012, Alaska's rare earth deposits and resource potential: Mining Engineering, v. 64, no. 1, p. 20-32.
Dostal, J., Karl, S.M., Keppie, J.D., Kontak, D.J., Shellnutt, J.G., 2013, Bokan Mountain peralkaline granitic complex, Alexander terrane (southeastern Alaska)-Evidence for Early Jurassic rifting prior to accretion with North America: Canadian Journal of Earth Sciences, v. 50, 678-691.
Dostal, Jaroslav, Kontak, D.J., and Karl, S.M., 2014, The Early Jurassic Bokan Mountain peralkaline granitic complex (southeastern Alaska)-Geochemistry, petrogenesis and rare-metal mineralization: Lithos, v. 202-203, p. 395-412.
Dostal, Jaroslav, and Shellnutt, J.G., 2016, Origin of peralkaline granites of the Jurassic Bokan Mountain complex (southeastern Alaska) hosting rare metal mineralization: International Geology Review, v. 58, no. 1, p. 1-13.
Long, K.R., Van Gosen, B.S., Foley, N.K., and Cordier, David, 2010, The principal rare earth elements deposits of the United States-A summary of domestic deposits and a global perspective: U.S. Geological Survey Scientific Investigations Report 2010-5220, p. 28-34. Available at http://pubs.usgs.gov/sir/2010/5220/.
MacKevett, E.M., Jr., 1963, Geology and ore deposits of the Bokan Mountain uranium-thorium area, southeastern Alaska: U.S. Geological Survey Bulletin 1154, 125 p., 5 plates.
McCafferty, A.E., Stoeser, D.B., and Van Gosen, B.S., 2014, Geophysical interpretation of U, Th, and rare earth element mineralization of the Bokan Mountain peralkaline granite complex, Prince of Wales Island, southeast Alaska: Interpretation, v. 2, no. 4, p. SJ47-SJ63.
Philpotts, J.A., Taylor, C.D., Tatsumoto, Mitsunobu, and Belkin, H.E., 1998, Petrogenesis of late-state granites and Y-REE-Zr-Nb-enriched vein dikes of the Bokan Mountain stock, Prince of Wales Island, southeastern Alaska: U.S. Geological Survey Open-File Report 98-459, 71 p.
Staatz, M.H., 1978, I and L uranium and thorium vein system, Bokan Mountain, southeastern Alaska: Economic Geology, v. 73, no. 4, p. 512-523.
Stoeser, D.B., 2013, Mineralogy and mineral paragenesis of the Dotson Ridge HREE deposit, Bokan Mountain, Prince of Wales Island, Alaska: Geological Society of America Abstracts with Programs, v. 45, no. 7, p. 276.
Taylor, C.D., Aleinikoff, J.N., Holm-Denoma, C.S., Neymark, L.A., Bala, S.A., Pascarelli, S.E., Pillers, R.M., Karl, S.M., Van Gosen, B.S., Morgan, L.E., and Cosca, M.A., 2016, New geochronologic constraints on the formation and hydrothermal enrichment of the Bokan Mountain peralkaline igneous complex and associated HREE deposits, southeastern Alaska, USA: Geological Society of America Abstracts with Programs, v. 48, no. 7, Abstract no. 286288.
Taylor, C.D., Lowers, H.A., Adams, D.T., and Robinson, R.J., 2017, Geochemistry and mineralogy of the Dotson Zone HREE deposit in the Bokan Mountain peralkaline igneous complex, southeastern Alaska, USA. Proceedings of the 14th SGA Biennial Meeting, 20-23 August 2017, Quebec City, Canada, p. 1329-1332.
Thompson, T.B., 1988, Geology and uranium-thorium mineral deposits of the Bokan Mountain granite complex, southeastern Alaska: Ore Geology Reviews, v. 3, p. 193-210.
Ucore Rare Metals, Inc., 2015, Ucore increased resource at Bokan-Dotson Ridge: Ucore Rare Metals press release, May 11, 2015. Accessed March 22, 2017, at http://ucore.com/ucore-increases-resource-at-bokan-dotson-ridge.
Warner, J.D., and Barker, J.C., 1989, Columbium- and rare-earth element-bearing deposits at Bokan Mountain, southeast Alaska: U.S. Bureau of Mines Open File Report 33-89, 196 p.
2010
2015
Sample collection and analysis period
Not planned
-132.18184
-132.09172
54.95189
54.89361
ISO 19115 Topic Category
geoscientificinformation
USGS Thesaurus
Rare Earth Elements
Uranium
Mineral deposits
Prospecting
Igneous rocks
Jurassic
Mesozoic
Exploration
Geochemistry
Geochemical surveys
none
Mineral Resources Program
MRP
USGS Metadata Identifier
USGS:59d801c4e4b05fe04cc81d9e
Geographic Names Information System (GNIS)
United States of America
USA
Alaska
Prince of Wales Island
Bokan Mountain
none
USA
Southeast Alaska
Alexander terrane
none
There is no guarantee concerning the accuracy of the data. Any user who modifies the data is obligated to describe the types of modifications they perform. Data have been checked to ensure the accuracy. If any errors are detected, please notify the originating office. The U.S. Geological Survey strongly recommends that careful attention be paid to the metadata file associated with these data. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to http://www.usgs.gov/privacy.html for the USGS disclaimer.
Bradley S. Van Gosen
U.S. Geological Survey
mailing and physical address
Box 25046, Denver Federal Center, MS 973
Denver
Colorado
80225
United States of America
1-303-236-1566
1-303-236-3200
bvangose@usgs.gov
The release of the data set was funded by the U.S. Geological Survey Mineral Resources Program.
The chemical data of this data set represent analyses of rock samples collected in support of mineral deposit research projects of the U.S. Geological Survey (USGS). Attribute fields and values were reviewed and checked for accuracy and consistency of terms.
This data set was derived from rock samples collected by U.S. Geological Survey (USGS) geologists and chemically analyzed by laboratories contracted by the USGS. The samples in this data set were collected for the purpose of trace elements and whole-rock major analysis and further petrologic and isotopic analyses. All samples were subject to the same sample preparation protocol and same analytical protocols. The samples have been analyzed using documented techniques.
This data set provides the chemical analyses of 153 rock samples for Ag, Al, As, Ba, Be, Bi, Ca, Cd, Ce, Co, Cr, Cs, Cu, Dy, Er, Eu, F, Fe, Ga, Gd, Ge, Hf, Ho, In, K, La, Li, Lu, Mg, Mn, Mo, Na, Nb, Nd, Ni, P, Pb, Pr, Rb, Sb, Sc, Si, Sm, Sn, Sr, Ta, Tb, Th, Ti, Tl, Tm, U, V, W, Y, Yb, Zn, Zr, and loss on ignition. Major elements are also expressed as oxides. In addition, the data set provides location and descriptive information for each sample.
1) Coordinates: The samples locations were recorded using hand-held GPS receivers using the WGS84 datum. The locations determined by GPS should be accurate to the nearest latitude or longitude second, or good to the nearest 10,000th of a degree latitude (11 meters) or longitude (8.7 meters).
No formal vertical (elevation) accuracy tests were conducted.
These data were generated by a commercial laboratory contracted by the U.S. Geological Survey (USGS). Upon completion of the chemical analysis, a quality control analysis of the results was conducted by USGS personnel. The final, approved data were stored in the Oracle-based National Geochemical Database (NGDB) maintained by the USGS.
Analytical data associated with these samples were derived using the following criteria: 1) Each analytical determination must be linked to a valid and unique sample lab number; and 2) each analytical determination must be identified by analyte.
To determine the concentrations of major elements and trace elements in the rock samples, two analytical methods were used, as follows:
Fifty-five major (except Si and Na), rare earth, and trace elements were determined in geological materials by inductively coupled plasma-atomic emission spectrometry (ICP-AES) and inductively coupled plasma-mass spectrometry (ICP-MS). 0.1 grams of sample was decomposed using a sodium peroxide sinter at 450°C. The resultant cake was leached with water and acidified with nitric acid. After an addition of tartaric acid, aliquots of the digested sample was aspirated into the ICP-AES and the ICP-MS. The concentrations of the optimal elements from the ICP-AES and ICP-MS were determined. Calibration on the ICP-AES was performed by standardizing with digested rock reference materials and a series of multi-element solution standards. The ICP-MS was calibrated with aqueous standards. Internal standards were used to compensate for matrix affects and internal drifts.
Analytical Performance: Data were deemed acceptable if recovery for elements was +/-15 percent at five times the limit of detection and the calculated relative standard deviation of duplicate sample was no greater than 15 percent.
Ten major elements (SiO2; Al2O3; CaO; MgO; Na2O; K2O; Fe2O3; MnO; P2O5; TiO2; and LOI at 1000°C) were determined in rocks and minerals by wavelength dispersive x-ray fluorescence spectrometry (WDXRF). Sample material was roasted at 1000°C for 1 hour in order to determine Loss On Ignition (LOI). Dried sample material was mixed with a Lithium Tetraborate/Lithium Metaborate/LiBr flux and placed into a platinum crucible. The sample was loaded into the automated Claisse Fluxer and samples were fused at 1100°C. Fused discs were analyzed using wavelength dispersive X-ray fluorescence spectrometry (WDXRF). The disc was irradiated by a rhodium x-ray tube. X-ray photons emitted by the elements in the sample were counted and concentrations determined using previously prepared calibration curves. Calibration curves for each element were derived from a variety of international reference materials and a number of synthetic standards to extend the range for certain elements. The standards covered a wide range of geological materials, biased towards igneous rock types.
Analytical Performance: Data were deemed acceptable if recovery for analytes was +/-5 percent at five times the limit of detection and the calculated relative standard deviation of duplicate samples was no greater than 5 percent.
20171004
point
point
153
0.0196804168
0.0338961127
Decimal seconds
D_WGS_1984
WGS_1984
6378137.0
298.257223563
Attribute Table
Table of spatial, geologic, descriptive attributes, and geochemical analyses of rock samples collected at Bokan Mountain, Prince of Wales Island, southeastern Alaska.
U.S. Geological Survey
Lab_Number
Unique identifier assigned by the U.S. Geological Survey laboratory information management system.
U.S. Geological Survey
Unique identifier assigned to each sample by the U.S. Geological Survey analytical lab's laboratory information management system.
Field_ID
Unique sample identifier assigned by the sampler (geologist).
U.S. Geological Survey
Unique identifier assigned to the rock sample by the sampler (geologist) in the field.
Latitude
Latitude coordinate of sample site using a hand-held GPS, reported in decimal degrees; recorded using datum of WGS84; resolution is 5-digit GPS precision.
U.S. Geological Survey
54.89361
54.95189
decimal degrees
Longitude
Longitude coordinate of sample site, using a hand-held GPS, reported in decimal degrees; recorded using datum of WGS84; resolution is 5-digit GPS precision.
U.S. Geological Survey
-132.18184
-132.09172
decimal degrees
Descript
Description of the geologic feature that is represented by the sample.
U.S. Geological Survey
Brief description of the geologic feature that is represented by the sample.
Location
Physical setting from which the sample was collected
U.S. Geological Survey
Physical setting (location) or feature from which the sample was collected
References
Citations that provide more detailed information on the geology.
U.S. Geological Survey
References that provide geologic context and more detailed information for the geologic feature represented by the sample. Full citations for the references cited are provided in the accompanying text file "References_Bokan_Mountain_Alaska.txt".
Al_pct_ICPAES
Aluminum, in weight percent. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
0.06
8.96
weight percent
Ca_pct_ICPAES
Calcium, in weight percent. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
-0.05
39.1
weight percent
Fe_pct_ICPAES
Iron, in weight percent. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
0.24
16.4
weight percent
K_pct_ICPAES
Potassium, in weight percent. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
-0.05
5.34
weight percent
Mg_pct_ICPAES
Magnesium, in weight percent. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
-0.01
9.45
weight percent
Mn_pct_ICPAES
Manganese, in weight percent. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
-0.01
1.53
weight percent
P_pct_ICPAES
Phosphorus, in weight percent. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
-0.01
1.47
weight percent
Ti_pct_ICPAES
Titanium, in weight percent. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. A null (or empty cell) means not analyzed. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
-0.01
2.01
weight percent
Ag_ppm_ICPMS
Silver, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. A null (or empty cell) means not analyzed. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-1
6
parts per million
As_ppm_ICPMS
Arsenic, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. A null (or empty cell) means not analyzed. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-30
330
parts per million
Ba_ppm_ICPAES
Barium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
-0.5
7310
parts per million
Be_ppm_ICPMS
Beryllium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. A value with the suffix ".1111" indicates a value above the upper detection limit of the analytical method. The absolute value of the ".1111" entry is the upper detection limit (for example, the value "2,500.1111" indicates an undetermined value in excess the upper detection limit of 2,500 parts per million). Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-5
9670
parts per million
Bi_ppm_ICPMS
Bismuth, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-0.1
16.8
parts per million
Cd_ppm_ICPMS
Cadmium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-0.2
23.5
parts per million
Ce_ppm_ICPMS
Cerium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
2.1
21400
parts per million
Co_ppm_ICPMS
Cobalt, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-0.5
13.4
parts per million
Cr_ppm_ICPAES
Chromium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
-10
100
parts per million
Cs_ppm_ICPMS
Cesium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-0.1
18.6
parts per million
Cu_ppm_ICPAES
Copper, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
-5
306
parts per million
Dy_ppm_ICPMS
Dysprosium, in parts per million. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
1.65
14000
parts per million
Er_ppm_ICPMS
Erbium, in parts per million. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
0.97
11800
parts per million
Eu_ppm_ICPMS
Europium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
0.12
358
parts per million
Ga_ppm_ICPMS
Gallium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. A null (or empty cell) means not analyzed. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-1
108
parts per million
Gd_ppm_ICPMS
Gadolinium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-5
5940
parts per million
Ge_ppm_ICPMS
Germanium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-1
22
parts per million
Hf_ppm_ICPMS
Hafnium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-1
3320
parts per million
Ho_ppm_ICPMS
Holmium, in parts per million. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
0.28
3610
parts per million
In_ppm_ICPMS
Indium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-0.2
3.1
parts per million
La_ppm_ICPMS
Lanthanum, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
0.7
11800
parts per million
Li_ppm_ICPAES
Lithium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
-10
2590
parts per million
Lu_ppm_ICPMS
Lutetium, in parts per million. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
0.22
1320
parts per million
Mo_ppm_ICPMS
Molybdenum, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-2
99
parts per million
Nb_ppm_ICPMS
Niobium, in parts per million. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
2
20500
parts per million
Nd_ppm_ICPMS
Neodymium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
1.7
10500
parts per million
Ni_ppm_ICPAES
Nickel, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
-5
47
parts per million
Pb_ppm_ICPMS
Lead, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-5
6860
parts per million
Pr_ppm_ICPMS
Praseodymium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
0.38
2700
parts per million
Rb_ppm_ICPMS
Rubidium, in parts per million. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
0.6
1060
parts per million
Sb_ppm_ICPMS
Antimony, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-0.1
25.1
parts per million
Sc_ppm_ICPAES
Scandium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
-5
16
parts per million
Sm_ppm_ICPMS
Samarium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
0.9
2620
parts per million
Sn_ppm_ICPMS
Tin, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-1
701
parts per million
Sr_ppm_ICPAES
Strontium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
-0.1
6720
parts per million
Ta_ppm_ICPMS
Tantalum, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-0.5
1420
parts per million
Tb_ppm_ICPMS
Terbium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-1
1760
parts per million
Th_ppm_ICPMS
Thorium, in parts per million. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
4.9
22200
parts per million
Tl_ppm_ICPMS
Thallium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-0.5
1.7
parts per million
Tm_ppm_ICPMS
Thulium, in parts per million. Analyses by and inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
0.18
1760
parts per million
U_ppm_ICPMS
Uranium, in parts per million. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
1.51
26500
parts per million
V_ppm_ICPAES
Vanadium, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
-5
396
parts per million
W_ppm_ICPMS
Tungsten, in parts per million. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
-1
235
parts per million
Y_ppm_ICPMS
Yttrium, in parts per million. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
7.1
85200
parts per million
Yb_ppm_ICPMS
Ytterbium, in parts per million. Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
1.2
10500
parts per million
Zn_ppm_ICPAES
Zinc, in parts per million. Analyses by inductively coupled plasma-atomic emission spectrometry (ICP-AES).
U.S. Geological Survey
14
7660
parts per million
Zr_ppm_ICPMS
Zircon, in parts per million. A value with the suffix ".1111" indicates a value above the upper detection limit of the analytical method. The absolute value of the ".1111" entry is the upper detection limit (for example, the value "10,000.1111" indicates an undetermined value in excess of the detection limit of 10,000 parts per million). Analyses by inductively coupled plasma-mass spectrometry (ICP-MS).
U.S. Geological Survey
14.8
113000
parts per million
Al203_pct_WDXRF
Aluminium, reported in oxide form in weight percent. A null (or empty cell) means not analyzed. Analyses by wavelength dispersive x-ray fluorescence spectrometry (WDXRF).
U.S. Geological Survey
0.9
16.9
weight percent
Ca0_pct_WDXRF
Calcium, reported in oxide form in weight percent. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. A null (or empty cell) means not analyzed. Analyses by wavelength dispersive x-ray fluorescence spectrometry (WDXRF).
U.S. Geological Survey
-0.01
57.8
weight percent
Cr203_pct_WDXRF
Chromium, reported in oxide form in weight percent. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. A null (or empty cell) means not analyzed. Analyses by wavelength dispersive x-ray fluorescence spectrometry (WDXRF).
U.S. Geological Survey
-0.01
0.02
weight percent
Fe203_pct_WDXRF
Iron, reported in oxide form in weight percent. A null (or empty cell) means not analyzed. Analyses by wavelength dispersive x-ray fluorescence spectrometry (WDXRF).
U.S. Geological Survey
0.29
23.8
weight percent
K20_pct_WDXRF
Potassium, reported in oxide form in weight percent. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. A null (or empty cell) means not analyzed. Analyses by wavelength dispersive x-ray fluorescence spectrometry (WDXRF).
U.S. Geological Survey
-0.01
6.18
weight percent
LOI_pct_WDXRF
Loss on ignition, reported in oxide form in weight percent. A null (or empty cell) means not analyzed. Analyses by wavelength dispersive x-ray fluorescence spectrometry (WDXRF).
U.S. Geological Survey
0.2
10.5
weight percent
Mg0_pct_WDXRF
Magnesium, reported in oxide form in weight percent. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. A null (or empty cell) means not analyzed. Analyses by wavelength dispersive x-ray fluorescence spectrometry (WDXRF).
U.S. Geological Survey
-0.01
1.4
weight percent
Mn0_pct_WDXRF
Manganese, reported in oxide form in weight percent. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. A null (or empty cell) means not analyzed. Analyses by wavelength dispersive x-ray fluorescence spectrometry (WDXRF).
U.S. Geological Survey
-0.01
1.2
weight percent
Na20_pct_WDXRF
Sodium, reported in oxide form in weight percent. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. A null (or empty cell) means not analyzed. Analyses by wavelength dispersive x-ray fluorescence spectrometry (WDXRF).
U.S. Geological Survey
-0.01
10.7
weight percent
P205_pct_WDXRF
Potassium, reported in oxide form in weight percent. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. A null (or empty cell) means not analyzed. Analyses by wavelength dispersive x-ray fluorescence spectrometry (WDXRF).
U.S. Geological Survey
-0.01
2.34
weight percent
Si02_pct_WDXRF
Silica, reported in oxide form in weight percent. A null (or empty cell) means not analyzed. Analyses by wavelength dispersive x-ray fluorescence spectrometry (WDXRF).
U.S. Geological Survey
14.1
93.3
weight percent
Ti02_pct_WDXRF
Titanium, reported in oxide form in weight percent. Negative values indicate determinations less than the detection limit of the analytical method. The absolute value of the negative number is the detection limit. A null (or empty cell) means not analyzed. Analyses by wavelength dispersive x-ray fluorescence spectrometry (WDXRF).
U.S. Geological Survey
-0.01
3.76
weight percent
References_Rock_Chemistry_Bokan_Mountain_Alaska.txt
Text file containing references that provide geologic context and more detailed information for the geologic feature represented by the sample.
U.S. Geological Survey
U.S.Geological Survey - ScienceBase
mailing and physical address
Denver Federal Center
Building 810
Mail Stop 302
Denver
Colorado
80225
United States of America
1-888-275-8747
sciencebase@usgs.gov
U.S. Geological Survey Data Release
Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty.
Microsoft Excel (.xls), CSV format (.csv), text file format (.txt)
geochemical sample locations and analyses
no compression applied
http://dx.doi.org/10.5066/F7KD1WVC
none
20200929
Bradley S. Van Gosen
U.S. Geological Survey
mailing and physical address
Box 25046, Denver Federal Center, MS 973
Denver
Colorado
80225
United States of America
1-303-236-1566
1-303-236-3200
bvangose@usgs.gov
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
none
none