INVESTIGADORES
LITVAK Vanesa Dafne
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.