Gardiner

quadrangle 1:100,000 scale

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Stillwater Complex Rock Outcrop Database

Polygons that describe areas of rock outcrop in the area of the Stillwater Complex, Montana from published reports and field mapping sheets. Includes both legacy data and outcrops from recent field mapping. This dataset contains overlapping polygons, as some areas had mapping from different sources that overlapped the same locations. Data are provided in shapefile format.

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Airborne electromagnetic and magnetic survey data, Stillwater Complex, Montana, May 2000 (ver. 2.0, June 2020)

Data from a helicopter-borne electromagnetic and magnetic survey flown over this area area in 2000. Nominal elevation of the sensor was 60 meters. Survey coverage comprises 1,914 line kilometers. Data are provided in CSV format.

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Thin section images of AMAX drill core from the Stillwater Complex, Montana

Photographs and micrographs of rock taken from cores in this area. Data are provided in JPEG and CR2 formats.

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Stillwater Complex, Montana - Logs of core drilled by AMAX, 1969 to 1977

Scanned drill core logs and explanatory material provided in PDF format. Hand-written notes provided in CSV format. Locations provided in shapefile format.

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

Whole rock geochemical analysis of sulfide- and chromite-bearing samples in this area, with specific interest in PGE, cobalt, and gold concentrations. Data are provided in CSV format.

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TIMA-X Bright Phase Analysis of Platinum-Group Minerals in Selected Samples from the Chrome and Iron Mountain areas of the Stillwater Complex, Montana

Bright phase and energy-dispersive spectroscopic analyses were performed to evaluate platinum-group element and mineral distribution in a variety of rock types from the lower stratigraphy of the Stillwater Complex in Montana. Data are provided in CSV format, supporting analytical data are provided as PDF reports and TIFF images.

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Stillwater Complex Strike and Dip Database

Geologic structure strike and dip information from this area from pre-existing digital strike and dip information and from digitizing strike and dip locations from georeferenced map images. Data are provided in shapefile format.

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Principal facts of gravity data from the Stillwater Complex, Montana, 2013-2014 and 2020

Gravity measurements were collected during 2013, 2014, 2020 at 168 sites on and around the Stillwater layered mafic complex. Data are provided in CSV and shapefile formats.

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Geochemistry of rocks and rock fabric data near the hanging wall contact to the Reef Package, Stillwater Complex, Montana, USA

Whole-rock major, minor, and trace element geochemistry of rock samples collected from diamond drill holes that intersect the textural discontinuity at the top of the Reef Package from the underground working of the Stillwater Mine. Data are provide in CSV format.

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Thin section images of drill core from the Crescent Creek area in the Stillwater Complex, Montana

Photographic images of thin sections of drill core from this area to study contact-type copper and nickel sulfide mineralization there. Data are provided in JPEG and CR2 formats, with a shapefile giving locations of the cores.

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Global Geochemical Database for Critical Minerals in Archived Mine Samples

Chemistry and geologic information for historic ore and ore-related rock samples from mineral deposits in the United States and from archetypal deposits from 27 other countries. Data are provide in Microsoft Access, Microsoft Excel, and CSV formats.

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