INGEIS   05370
INSTITUTO DE GEOCRONOLOGIA Y GEOLOGIA ISOTOPICA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Biotite composition and constraints on magma sources for the Late Permian-Early Triassic igneous complexes, north of Yaminué, North Patagonian Massif, Rio Negro, Argentina
Autor/es:
LÓPEZ DE LUCHI, M. G.; MARTÍNEZ DOPICO, C.; RAPALINI, A.E.
Lugar:
General Roca
Reunión:
Simposio; Tercer Simposio Petrología Ígnea y Metalogénesis Asociada; 2015
Institución organizadora:
Universidad de Rio Negro.Sede Roca/ AGA
Resumen:
The extensive belt of Late Paleozoic?Early Triassic granitoids cropping out between Yaminué and Nahuel Niyeu villages, northeastern North Patagonian Massif (NPM) was separated into three magmatic complexes. i.e. the Late Permian Yaminué Metaigneous Complex (YMIC), the Late Permian Cabeza de Vaca Granite (CVG) and the Permian Navarrete Plutonic Complex (NPC) (López de Luchi et al.2010, Rapalini et al. 2010, 2013,Chernicoff et al. 2013, Pankhurst et al. 2014 and references therein). We present mineralogical constraints on the sources of the Late Paleozoic?Early Triassic granitoids cropping out south of Ramos Mexía (40º30?05??S-67º15?42??W) down to the Yaminué villages (40º57?03??S-67º10?27??W). These granitoids correspond to the YMIC, CVG and to a new unit, the Late Permian (?)-Early Triassic Ramos Mexia Plutonic Complex (RMPC) which encompasses the Robaina Granite (RG) and the Guanacos Granodiorite
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