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

MARTINO, R. D.; FOURTY, A.; BROKMEIER, H.-G.; BOLMARO, R.

Pittsburgh (USA)

Conferencia; 15th International Conference on the Textures of Materials (ICOTOM); 2008

The American Ceramic Society

The deformation fringe of Guamanes (DFG) is a shearing zone on Sierras de Córdoba (Argentina) extending approximately 45 kilometers parallel to the 64º50’00” meridian. Its width varies in between 1 and 4 kilometers and can be divided 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 ductile followed by a fragile stage, have been identified. We will present textures of some granitic pegmatites that are layered by quartz veins co-deformed during the same events. The data will be analyzed by regular texture analysis and viscoplastic self consistent simulations. The cinematic is inferred from the simulations contributing to the description of the tectonics of the región.