Quartzite Textures in the Córdoba Sierra (Argentina). The Guamanes Region

ROBERTO MARTINO,; A FOURTY,; G BROKMEIER, H; R. E. BOLMARO

Pittsburgh

Congreso; 15th International Conference on Textures of Materials; 2008

Pittsburgh University. Materials Science Department.

The deformation fringe of Guamanes (DFG) is a shearing zone on Sierras de Córdoba (Argentina) extending approximately 45 kilometers parallel to the  64°50’00” meridian. Its width varies in between 1 and 4 kilometers and can be dividen in the north and south parts The south part has been already quite well studied with a complete description of its milonitic rocks and the cinematic.   Filonites in the north and milonites with filonites and non deformed rocks in the south apparently separate two well defined domains of deformation. Two different deformation events, one ductil followed by a fragil stage, have been identified. We will present textures of some granitic pegmatites that are layered by quartz veins codeformed during the same events. The data will be analyzed by regular texture analysis and viscoplastic self consitent simulations. The cinematic is infered from the simulations contributing to the description of the tectonics of the region.