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Ulf Söderlund

Ulf Söderlund

Professor

Ulf Söderlund

Relationship between platinum-bearing ultramafic-mafic intrusions and large igneous provinces (exemplified by the Siberian Craton)

Author

  • A. S. Mekhonoshin
  • R. Ernst
  • U. Soderlund
  • Michael A. Hamilton
  • T. B. Kolotilina
  • A. E. Izokh
  • G. V. Polyakov
  • N. D. Tolstykh

Summary, in English

This study aims at summarizing available geological and geochemical data on known Proterozoic platinum-bearing ultramafic-mafic massifs in the south of Siberia. Considering new data on geochemistry and geochronology of some intrusions, it was feasible to compare ore-bearing complexes of different time spans and areas and to follow their relationships with the recognized large igneous provinces. In the south of Siberia, the platinum-bearing massifs might be united into three age groups: Late Paleoproterozoic (e.g., Chiney complex, Malozadoisky massif), Late Mesoproterozoic (e.g., Srednecheremshansky massif), and Neoproterozoic (e.g., Kingash complex, Yoko-Dovyren massif, and massifs in the center of the East Sayan Mts.). In most massifs but Chiney the initial magmas are magnesium-rich. On paleogeodynamic reconstructions, the position of the studied massifs is the evidence that three most precisely dated events in North Canada continued into southern Siberia: In the period 1880-1865 Ma, it was the Ghost-Mara River-Morel LIP; at 1270-1260 Ma, the Mackenzie LIP; and at 725-720 Ma, Franklin LIP. In Siberia, the mostly productive massifs with respect to PGE-Ni-Cu mineralization are those linked with the Franklin LIP: Verkhny Kingash, Yoko-Dovyren, and central part of the Eastern Sayan Mountains, e.g., Tartay, Zhelos, and Tokty-Oy.

Department/s

  • Lithosphere and Biosphere Science

Publishing year

2016-05-01

Language

English

Pages

822-833

Publication/Series

Russian Geology and Geophysics

Volume

57

Issue

5

Document type

Journal article

Publisher

Publishing House of Siberian Branch of the Russian Academy of Sciences

Topic

  • Geology

Keywords

  • Large igneous provinces
  • Mafic-ultramafic intrusions
  • PGE-Ni-Cu deposits

Status

Published

ISBN/ISSN/Other

  • ISSN: 1068-7971