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Lithogeochemistry of selected surface and drill core samples from the Chrome and Iron Mountain areas of the Stillwater Complex, Montana

Metadata Updated: October 28, 2023

Sulfide- and chromite-bearing samples of the Basal and Ultramafic series of the Stillwater Complex are known to contain elevated concentrations of chromium, nickel, copper, cobalt, gold, and platinum-group elements (PGE). Drill core and surface samples were collected from the Chrome and Iron Mountain areas for whole rock geochemical analysis, with specific interest in PGE, cobalt, and gold concentrations. Core samples are from exploration drilling programs by AMAX in the 1960s and 1970s and Beartooth Platinum in 2004-2007. Reported whole rock data were measured using the following methods: major elements by wavelength dispersive X-ray fluorescence (WDXRF), 60 trace elements by inductively coupled plasma—optical emission spectrometry (ICP-OES), total sulfur and carbon by combustion and infrared detection, ferrous oxide by titration, essential and non-essential water by gravimetric analysis, and gold, platinum, and palladium by lead-fusion fire-assay. Chromitite samples, with greater than 20 wt% Cr2O3, were also analyzed for the full suite of PGE by nickel sulfide fire assay and instrumental neutron activation. Data are reported in a comma-separated values (CSV) file (Chrome_Iron_Stillwater_Geochemistry) that lists the samples that were analyzed, drill hole identification number and depth (if applicable), latitude/longitude location information, and brief sample descriptions. All column headings and abbreviations are explained in the accompanying data dictionary (Chrome_Iron_Geochem_DataDictionary).

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 28, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 28, 2023
Publisher U.S. Geological Survey
Identifier USGS:5d2bada9e4b038fabe22952b
Data Last Modified 20200820
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 38647cde-38e1-49e7-a83f-ffd7b82c96ee
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -110.1305,45.4033,-110.04491,45.44078
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash cbb009fb18c8a54900fae22c1c6c54d3ff34533703862d3b8f03b8fc141ade0d
Source Schema Version 1.1
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