Platinum-bearing placers: MINERAL ASSOCIATIONS AND THEIR Pt-190-He-4 AND Re-Os AGES, AND POTENTIAL LINKS WITH LARGE IGNEOUS PROVINCES IN THE SIBERIAN CRATON

A. V. Okrugin, O. V. Yakubovich, R. E. Ernst, Zh. Yu. Druzhinina

Research output: Contribution to journalArticlepeer-review

Abstract

Placer deposits in the Siberian platform are closely associated with well-known platiniferous intrusions (Kondyor, Inagli, Noril’sk, Chiney, and Guli) but there are also abundant platinum-group mineral (PGM) placers of large areal extent in the river basins of Siberia (Vilyui, Lena, Aldan, Anabar, and Olenek) for which the primary sources are unknown. The 190Pt-4He dating method is introduced, compared with existing Re-Os isotope dating of PGMs, and applied to Pt-bearing placers of Siberia. Correlations between the 190Pt-4He and Re-Os isotope ages of the PGMs and with ages of major magmatic events in the Siberian craton show that the potential sources for some of the placers are likely buried Precambrian mafic-ultramafic intrusions of Large Igneous Provinces (LIP). The approach of this paper can be applied to other cratonic areas with alluvial PGMs of unknown origin.

Original languageEnglish
Pages (from-to)1835-1853
Number of pages19
JournalEconomic Geology
Volume115
Issue number8
DOIs
StatePublished - Dec 2020

Scopus subject areas

  • Geophysics
  • Geology
  • Geochemistry and Petrology
  • Economic Geology

Fingerprint Dive into the research topics of 'Platinum-bearing placers: MINERAL ASSOCIATIONS AND THEIR Pt-190-He-4 AND Re-Os AGES, AND POTENTIAL LINKS WITH LARGE IGNEOUS PROVINCES IN THE SIBERIAN CRATON'. Together they form a unique fingerprint.

Cite this