Fault tectonics of the Svetlinskoye gold deposit (South Urals) and its role in ore control

Structural geological studies were conducted between 2009 and 2014 in the quarry of Svetlinskoe gold deposit (South Urals). Svetlinskoe gold deposit is located in zone of the large west dipping thrust. Three types of quartz veins accompanying gold-bearing pyrite-quartz-biotite metasomatites are identified: 1) the largest steep deep veins of sub-meridional orientation; 2) the most numerous steeply dipping sub-latitudinal veins; 3) sub meridional low density small-size veins shallow dipping to the west. Formation of quartz veins were related to the formation of Svetlinskaya dome fold structure with granite-gneiss core located to the east of the thrust. It is supposed that granitization causes the gold accumulation in a metamorphic framing of the dome. Following hydro- thermal processes led to the gold redistribution and deposit formation. Some gold could come from the lower crust and upper mantle through the thrust permeable zone.