INGEOSUR   20376
INSTITUTO GEOLOGICO DEL SUR
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Microtexturas de reaccián en zonas de blackwall, faja máfica-ultramáfica del Río de Las Tunas, Cordillera Frontal de Mendoza
Autor/es:
GARGIULO, M. FLORENCIA; ASIAIN, LUCÍA M.; BJERG, ERNESTO A.
Lugar:
San Miguel de Tucumán
Reunión:
Congreso; 12° Congreso de Mineralogía y Metalogenia (MinMet); 2016
Institución organizadora:
Instituto Superior de Correlación Geológica (INSUGEO), Universidad Nacional de Tucumán (UNT) y Asociación Mineralógica Argentina (AMA).
Resumen:
"Reaction microtextures in blackwall zones, Río de Las Tunas mafic-ultramafic belt, Cordillera Frontal of Mendoza?.Reaction microtextures developed in the chlorite blackwall zones located in between bodies from Río de Las Tunas maficutramafic belt and schist country rock were studied in this contribution. The outcrops belong to the Cordillera Frontal of Mendoza province. The studied microtextures are developed in porfiroblasts completely replaced by chlorite. Around these porfiroblasts is observed a rim with microvermiform spinels.l. aggregates in reaction with chlorite and magnetite groundmass. Small amphibole porfiroblasts with chemical zoning is superimposed to these reaction rims. The studied microtextures can be explained by the reaction chlorite + magnetite à spinel, which indicates a relative increase in the T of the system. This increase can be related with the gondwanic magmatism developed in the area.