INVESTIGADORES
CISTERNA Clara Eugenia
congresos y reuniones científicas
Título:
Superimposed deformational episodes along the migmatitic belt, central portion of the Sierras Pampeanas Septentrionales, Central Andes (Argentina): an example from Las Cañas Complex
Autor/es:
CISTERNA, C. E., MON, R., MENA, R.
Lugar:
Nice
Reunión:
Congreso; 7th International Symposium on Andean Geodynamics (ISAG 2008, Nice); 2008
Institución organizadora:
ISAG
Resumen:
The northern Argentina Proterozoic - early Paleozoic basement is composed of an assembly of multiply folded orogenic belts with different structural characteristics, amalgamated at about 600 Ma (Mon and Hongn 1996). Preliminary studies allowed to recognize, at the central portion of the Pampean belt, (río Las Cañas, cuesta de La Chilca, La Majada, and others) a crystalline core composed by gneisses and migmatites, marginated eastward and westward by low grade schists separated by west-dipping thrusts (Mon y Hongn 1996) (Fig. 1). This migmatitic belt is the main object of this study. It represents a deep magmatic arc, where the relative synchronicity and/or feedback relations between heat, deformation, partial melting and regional metamorphism generated an igneous metamorphic complex highly deformed by multiple deformational episodes during a contractional regime.
