GEODYNAMICS OF THE SAYAN-BAIKAL-MUYA ACCRETION-COLLISION BELT IN THE NEOPROTEROZOIC-EARLY PALEOZOIC AND REGULARITIES OF THE FORMATION AND LOCALIZATION OF PRECIOUS-METAL MINERALIZATION
S.M. Zhmodik, A.A. Postnikov*, M.M. Buslov, and A.G. Mironov**
Institute of Geology, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, 630090, Russia
* Institute of Petroleum Geology, Siberian Branch of the RAS, 3 prosp. Akad. Koptyuga, 630090, Russia
** Geological Institute, Siberian Branch of the RAS, 6 ul. Sakh'yanovoi, Ulan Ude, 670047, Russia
Keywords: Microcontinent, island arc, subduction, collision, ophiolites, gold, precious-metal deposits
Pages: 187-201
Subsection: PETROLOGY, GEOCHEMISTRY, AND ORE FORMATION
Abstract
Analysis of geological and isotope-geochronological data on the Sayan-Baikal-Muya belt has shown that subduction and the subsequent collision of microcontinents with island arc were essential in the Neoproterozoic-Early Paleozoic. They influenced the formation, localization, and preservation of gold mineralization in ophiolite belts and the formation of ore clusters with diverse types of precious-metal deposits and mineralization: gold-PGE, in blueschist rocks; high-temperature (>400
|
