Age of the Au-Ag mineralization and its relation to the magmatism at the Dess occurrence,North Stanovaya metallogenic zone (southeastern framing of the North-Asian Craton) |
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| Authors: | I V Buchko A A Sorokin V A Ponomarchuk A V Travin Ir V Buchko |
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| Institution: | 1.Institute of Geology and Nature Management, Far East Branch,Russian Academy of Sciences,Blagoveshchensk,Russia;2.V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch,Russian Academy of Sciences,Novosibirsk,Russia;3.Scientific-Industrial Geological Enterprise Regis,Blagoveshchensk,Russia |
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| Abstract: | Mesozoic ore systems were responsible for the formation of numerous Au, Ag, Mo, and Pb occurrences and deposits in the North-Stanovaya
metallogenic zone, the largest of which are the Bamskoe, Vykhodnoe, Mogotinskoe, Dess, Nakhodka, and Apsakan deposits. The
age of the hydrothermal-metasomatic processes that accompanied the mineralization is 130–122 Ma, which allows us to relate
the ore formation to the origin of the granitoids of the Tynda-Bakaran complex (138–124 Ma). The latter rocks form large intrusions
united into the Stanovoi Belt in the southeastern framing of the North-Asian Craton. The ore objects change in the sequence
Au-Ag-Au-Mo(Au) from the south northward and are restricted to the contact zones of intrusions of the Stanovoi Belt, which
were probably formed at the transform continental margin. |
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