Estudio de la Orientación Cristalográfica prefernte del Cuarzo en el Contacto entre Gneises y Metatexitas-Diatexitas del Macizo Cerro Pelado (Sierra de Comechingones, Argentina)

• Autores: P. Castellarini, Carlos Fernández Rodríguez, J. Otamendi
• Localización: Geogaceta, ISSN 0213-683X, Nº. 35, 2003, págs. 67-69
• Idioma: español
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• Resumen

  • The quartz e-axis fabrics measured in the rocks of the high-grade unit of the Cerro Pelado massif (northern Sierra de Comechingones, Sierras Pampeanas, Argentina) allow to deduce a normal-sinistral sense of movement for the south-dipping shear zone separating the diatexite-metatexite domain to the north, from the gneissic terrane to the south. The crystallographic fabrics also indicate that the activity of this shear zone took place under high-T conditions. The deduced kinematics can account for the syn-metamorphic exhumation of the migmatite domain.