Ovacik gold deposit: An example of quartz-adularia-type gold mineralization in Turkey


Yilmaz H.

ECONOMIC GEOLOGY AND THE BULLETIN OF THE SOCIETY OF ECONOMIC GEOLOGISTS, vol.97, no.8, pp.1829-1839, 2002 (SCI-Expanded) identifier

Abstract

The Ovacik gold deposit is located 100 km north of Izmir in western Turkey. It lies adjacent to the east-northeast-trending Bergama graben, and it consists of a series of high-grade gold-bearing epithermal quartz veins hosted by subaerial andesitic-dacitic lava dome facies of lower Miocene age. The region is underlain by Paleozoic metamorpbic rocks and limestone, which are cut by medium- to high-level intrusions and overlain by subaqueous and subaerial andesitic to dacitic lava domes that host the Ovacik gold deposit. Middle to late Miocene extensional tectonic activity was responsible for the formation of north-northeast-south-southwest to northeast-southwest-trending grabens. The extensional activity was accompanied by normal faulting with a later, variable sinistral strike-slip component oriented east-west and north-west-southeast. it is probable that these faults were critical in controlling the development of epithermal quartz veins, both mineralized and unmineralized.