IDEAN   23403
INSTITUTO DE ESTUDIOS ANDINOS "DON PABLO GROEBER"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
P-T estimates for equilibrium of Miocene arc magmas over the Pampean Flat slab, Southern Central Andes, Argentina
Autor/es:
LITVAK, VANESA D.; POMA, STELLA
Lugar:
Antofagasta
Reunión:
Congreso; 13° Congreso Geológico Chileno; 2012
Institución organizadora:
Universidad Católica del Norte
Resumen:
Miocene arc magmatism in Southern Central Andes is represented by Cerro de las Tórtolas Formation lavas, which crop out along Valle del Cura and El Indio belts. This unit is divided in two sections according to its petrographical, chemical and age differences. In the Argentine slope, they correspond to andesites and dacites with plagioclase, clinopyroxene, orthopyroxene and amphibole phenocrysts. Mineral chemistry for this assamblage show a relatively homogenous composition between Lower and Upper Sections volcanic rocks. Geothermobarometry show, as a result, the same P and T conditions in the equilibrium of the mineral assamblages.