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Platinum, palladium, and rhodium analyses of ultramafic and mafic rocks from the Stillwater Complex, Montana

Circular 624

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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.

Additional publication details

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
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