Colombian platinum placers (unspecified origin)

Not specified, Colombie

OtherPGE (Os, Ir)

Type: Osmiridium placer derived from ultramafic rocks

Colombian placer osmiridium of unknown origin; age of 90 Ma used by Allègre and Luck (1980).

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
0.1244 ± 0.0004	0.1241 / 0.1246	2	placer osmiridium (two analyses) Mean and standard deviation recalculated from 2 analyses, 0.1241 to 0.1246 ((1) 0.1241; (2) 0.1246). Published 187Os/186Os: (1) 1.031 ± 0.006; (2) 1.035 ± 0.005. Estimated age: 90 Ma. Rows (1) and (2) of the table are kept separate.	Allègre & Luck (1980), Osmium isotopes as petrogenetic and geological tracers, Earth and …

Deposits of the same type

Central African Copperbelt (whole province) DR Congo and Zambia
Witwatersrand basin South Africa
Stelvio Italy
Oris Italy
Kupferschiefer, Lubin-Sieroszowice district Poland
Timna Israël
Datangpo-type manganese (Gaolou, Minle, Zhenxing) China
Eyller Bruch bog iron ore Germany

Cite this page

IsoFind Atlas (2026). Colombian platinum placers (unspecified origin), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/placers-platiniferes-de-colombie-origine-non-precisee/ (accessed 2026-10-21).

@misc{isofind2026colombianplatinumplacersunspe,
  title = {Colombian platinum placers (unspecified origin), isotope signatures},
  author = {{IsoFind Atlas}},
  year = {2026},
  url = {https://www.isofind.tech/isotopes/en/deposits/placers-platiniferes-de-colombie-origine-non-precisee/},
  note = {Accessed 2026-10-21}
}

Updated : 2026-10-21