Rogue River platinum placers (Oregon)
Oregon, Klamath and Siskiyou Mountains, United States
OtherPGE (Os, Ir, Ru)
- Type
- Osmium alloy (PGE) placer derived from peridotites
Rogue River placers, the main drainage of the Josephine peridotite (Klamath and Siskiyou Mountains). Meibom et al. (2004): mantle-derived Os-rich alloys, subchondritic Re/Os and Pt/Os.
187Os/188Os isotope ratio, no unit Values of the same system
Standard : Rapport absolu, sans standard de référence
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.13504 ± 0.01542 | 0.1222953 / 0.1595316 | 5 | Os-rich osmium alloy (detrital grain) Mean and standard deviation recalculated from 5 analyses, 0.1222953 to 0.1595316 (AM 10-28 0.1265841; AM 10-87 0.1259158; AM 10-95 0.1595316; AM 9-85.1 0.1408947; AM 10-62 0.1222953). Grains from the collection: Muséum d'histoire naturelle de Vienne (A.a. 5432). Re/Os below 10^-3. AM 10-28 186Os/188Os 0.1198415, Pt/Os 0.89 (1 load); AM 10-87 186Os/188Os 0.1198402, Pt/Os 0.61 (1 load); AM 10-95 186Os/188Os 0.1198236, Pt/Os 0.26 (5 loads); AM 9-85.1 186Os/188Os 0.1198350 (10 loads); AM 10-62 186Os/188Os 0.1198378, Pt/Os 0.43 (5 loads). | Meibom et al. (2004), Osmium isotopic compositions of Os-rich platinum group element allo… |
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Cite this page
IsoFind Atlas (2026). Rogue River platinum placers (Oregon), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/placers-platiniferes-de-la-rogue-river-oregon/ (accessed 2026-10-21).
@misc{isofind2026rogueriverplatinumplacersoreg,
title = {Rogue River platinum placers (Oregon), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/placers-platiniferes-de-la-rogue-river-oregon/},
note = {Accessed 2026-10-21}
}Updated : 2026-10-21