Magmatismo Neógeno y Cuaternario

FOLGUERA, A.; SPAGNUOLO, M.; ROJAS VERA, E.; LITVAK, V.; ORTS, D.L.; RAMOS, V.A.

Relatorio del XVIII Congreso Geológico Argentino: Geología y Recursos Naturales del Neuquén

Asociación Geológica Argentina

Año: 2011; p. 275 - 287

Magmatic volcanic sequences in the Neuquén Province can be divided in three main groups. First a series of interconnected volcaniclastic depocenters in the Andean region gathered in the Cura Mallín basin and contemporaneous within-plate products in the foreland region. Second arc-related volcanics expanded in the eastern Andean slope. And third Pliocene to Quaternary within-plate bimodal products located from the arc region to the foreland area. Description of spatial distribution of these sequences allow proposing a simple model in which slab subducted shallowings affected the northern and southern Neuquén areas respectively, followed by steepenings in the last 5 Ma that produced differential asthenosphere injection in the retroarc zone, creating variable volcanic fields in duration and size.