CIG 05423
CENTRO DE INVESTIGACIONES GEOLOGICAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Petrología y geoquímica del magmatismo Jurásico-Cretácico vinculado a las mineralizaciones de Fe-Cu del cerro Pepita, SO del Chubut
Autor/es:
LANFRANCHINI, MABEL; GONZÁLEZ, PABLO D.; DE BARRIO, RAÚL; ETCHEVERRY, RICARDO; AMETRANO, SILVIA
Lugar:
Buenos Aires
Reunión:
Congreso; 8º Congreso de Mineralogía y Metalogenia (8º MINMET 2006); 2006
Institución organizadora:
Depto. Cs. Geológicas-UBA
Resumen:
Fe-Cu skarn and hydrothermal deposits, at the Pepita Hill (SW Chubut Province), are related to Jurassic-Cretaceous magmatism. Detailed petrographic studies and whole rock geochemcial analyses performed on basalt-basaltic andesite flows (Lago La Plata Fm) and rhyolitic-dacitic dikes and subvolcanic bodies (El Gato Fm) allowed to characterize the meta-aluminous to weakly per-aluminous, tholeiite-calc-alkaline signature, associated to a magmatic arc setting. The iron source of the El Abuelo ore deposits is possibly related to the tholeiitic affinity of rocks from Lago La Plata Formation.
