Age and geodynamic setting of the formation of the dess gold-silver deposit (North Stanovoi metallogenic zone,southeastern fringes of the North Asian Craton) |
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| Authors: | I V Buchko A A Sorokin V A Ponomarchuk A V Travin A P Sorokin Ir V Buchko |
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| Institution: | 1.Institute of Geology and Nature Management, Far East Division,Russian Academy of Sciences,Blagoveshchensk,Russia;2.Sobolev Institute of Geology and Mineralogy, Siberian Branch,Russian Academy of Sciences,Novosibirsk,Russia |
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| Abstract: | This article discusses the results of 40Ar/39Ar geochronological studies on the age of the gold-silver mineralization of the Dess occurrence hosted by the granitoids of
the Tynda-Bakaran rock complex, which is 129–128 Ma. This estimate coincides with the time of the formation of the Mo mineralization
(125–122 Ma) hosted by the rocks of the same rock complex. This allows dating the Au-Ag and Mo mineralizations from the same
ore formation period that manifests itself in the granitoids of the North Stanovoi metallogenic belt that were formed in the
environment of a transform continental margin. There exists the following sequence of changes in the mineral occurrences from
the south to the north: Au-Ag-Au-Mo(Au). |
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