Platinum, palladium, and rhodium analyses of ultramafic and mafic rocks from the Stillwater Complex, Montana
Circular
624
By: Norman J. Page, Leonard Benjamin Riley, and Joseph Haffty
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Abstract
Analyses by a combination fire- assay-solution-optical-emission spectrographic method of 137 rocks from the Stillwater Complex, Mont., indicate that platinum, palladium, and rhodium are preferentially concentrated in chromitite zones. The A chromitite zone (21 samples) has an average of 988.9 ppb (pans per billion, 10-9) Pt, 2290.2 ppb Pd, and 245.9 ppb Rh and reaches a maximum (to date) of 8,000 ppb Pt, 11,000 ppb Pd, and 1,700 ppb Rh.
Suggested Citation
Page, N.J., Riley, L.B., Haffty, J., 1969, Platinum, palladium, and rhodium analyses of ultramafic and mafic rocks from the Stillwater Complex, Montana: U.S. Geological Survey Circular 624, iii, 12 p., https://doi.org/10.3133/cir624.
ISSN: 2330-5703 (online)
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Platinum, palladium, and rhodium analyses of ultramafic and mafic rocks from the Stillwater Complex, Montana |
| Series title | Circular |
| Series number | 624 |
| DOI | 10.3133/cir624 |
| Year Published | 1969 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Washington, D.C. |
| Description | iii, 12 p. |
| Country | United States |
| State | Montana |
| Other Geospatial | Stillwater Complex |