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

Mekhonoshin, A. S.Irkutsk State Technical University,Siberian Branch of the Russian Academy of Sciences (författare)

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.

Ernst, R.Tomsk State University,Carleton University (författare)
Soderlund, U.Lund University,Lunds universitet,Berggrundsgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Lithosphere and Biosphere Science,Department of Geology,Faculty of Science(Swepub:lu)geol-uso (författare)
Hamilton, Michael A.University of Toronto (författare)
Kolotilina, T. B.Siberian Branch of the Russian Academy of Sciences,Irkutsk State Technical University (författare)
Izokh, A. E.Novosibirsk State University,V.S. Sobolev Institute of Geology and Mineralogy (författare)
Polyakov, G. V.V.S. Sobolev Institute of Geology and Mineralogy (författare)
Tolstykh, N. D.V.S. Sobolev Institute of Geology and Mineralogy (författare)
Irkutsk State Technical UniversitySiberian Branch of the Russian Academy of Sciences (creator_code:org_t)

Ingår i:Russian Geology and Geophysics: GeoScienceWorld57:5, s. 822-8331068-7971

Av författaren/redakt...: Mekhonoshin, A. ...; Ernst, R.; Soderlund, U.; Hamilton, Michae ...; Kolotilina, T. B ...; Izokh, A. E.; visa fler...; Polyakov, G. V.; Tolstykh, N. D.; visa färre...

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.