Mineralogical–Geochemical Types and 190 Pt– 4 He Age of Ferroan Platinum of Placers of the Anabar River Basin, Northeastern Part of the Siberian Platform

А.В. Округин, Ольга Валентиновна Якубович, Александр Михайлович Гедз, А.Л. Земнухов, П.О. Иванов

Research output

Abstract

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.

Original languageEnglish
Pages (from-to)134-137
Number of pages4
JournalDoklady Earth Sciences
Volume484
Issue number2
DOIs
Publication statusPublished - 1 Aug 2019

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platinum
river basin
mineral
solid solution
rock
silicate

Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Earth and Planetary Sciences(all)

Cite this

Округин, А.В. ; Якубович, Ольга Валентиновна ; Гедз, Александр Михайлович ; Земнухов, А.Л. ; Иванов, П.О. / Mineralogical–Geochemical Types and 190 Pt– 4 He Age of Ferroan Platinum of Placers of the Anabar River Basin, Northeastern Part of the Siberian Platform. In: Doklady Earth Sciences. 2019 ; Vol. 484, No. 2. pp. 134-137.
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abstract = "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.",
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Mineralogical–Geochemical Types and 190 Pt– 4 He Age of Ferroan Platinum of Placers of the Anabar River Basin, Northeastern Part of the Siberian Platform. / Округин, А.В. ; Якубович, Ольга Валентиновна; Гедз, Александр Михайлович; Земнухов, А.Л.; Иванов, П.О.

In: Doklady Earth Sciences, Vol. 484, No. 2, 01.08.2019, p. 134-137.

Research output

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AU - Округин, А.В.

AU - Якубович, Ольга Валентиновна

AU - Гедз, Александр Михайлович

AU - Земнухов, А.Л.

AU - Иванов, П.О.

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AB - 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.

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