INVESTIGADORES
GARGIULO Maria Florencia
artículos
Título:
Microtexturas de reacción 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.
Revista:
Acta Geológica Lilloana
Editorial:
Fundación Miguel Lillo
Referencias:
Lugar: San Miguel de Tucumán; Año: 2016 vol. 28 p. 148 - 150
ISSN:
2310-2799
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 mafic-utramafic 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 spinel s.l. aggregates in reaction with the 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 to 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.
