CIG 05423
CENTRO DE INVESTIGACIONES GEOLOGICAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Condiciones físicas del metamorfismo de alta temperatura y baja presión del basamento Paleozoico Inferior en el área de San Martín de los Andes, Neuquén
Autor/es:
SERRA VARELA, S.; HEREDIA, N.; GIACOSA, R.; GONZÁLEZ, P.D.; SATO, A.M.
Lugar:
San Miguel de Tucuman
Reunión:
Congreso; XX Congreso Geologico Argentino; 2017
Institución organizadora:
Comité Organizador
Resumen:
Metamorphic rocks from San Martin de Los area comprise schists, gneises and migmatites. These rocks are intruded by Devonian granitoids that cut the metamorphic internal structure of these rocks. These rocks belong to a pre-Gondwanan cycle and its regional extension in the Norpatagonian Andes is unknown. Petrographic analysis and PT pseudosections allowed us to determine physical parameters in order to characterize the metamophic conditions. Migmatic rocks would be part of a low pressure-hightemperature series (LP-HT) in the transition between amphibolite and granulite facies. COnsidering its metamorphic characteristics and age (pre-Devonian), no equivalent rocks have yet been found in nearby areas with outcrops of pte-Andean basement.
