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.
| 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 |