DOI

Abstract: Typical features of platinum group minerals (PGMs) and the results of 190 Pt– 4 He dating of the Fe–Pt solid solutions are presented for complex gold–platinum–diamond placers with unidentified sources of the Anabar River basin. For the first time, the 190 Pt– 4 He isotopic system is used for determination of the possible age of the primary source of a PGM placer from the example of ferroan platinum with a disordered structure along with isoferroan platinum. The PGMs of these placers mostly include ferroan platinum and isoferroan platinum and rare Ru–Ir–Os alloys. The calculated bulk composition of the silicate inclusion of Ir platinum corresponds to the rocks of the ijolite–melteigite series. The 190 Pt– 4 He age of the Fe–Pt solid solution grains is 261 ± 13 Ma. Thus, our data indicate the relation between placer PGMs of the Anabar River basin and Permian–Triassic complexes of alkaline–ultramafic rocks.

Язык оригиналаанглийский
Страницы (с-по)134-137
Число страниц4
ЖурналDoklady Earth Sciences
Том484
Номер выпуска2
DOI
СостояниеОпубликовано - 1 авг 2019

    Предметные области Scopus

  • Планетоведение и науки о земле (разное)
  • Планетоведение и науки о земле (все)

ID: 38464572