Estratigrafía y petrografía de los depósitos volcanoclásticos del Complejo volcánico Domuyo, noroeste neuquino

Abstract

Along the creeks of streams Covunco and Atreuco, on the southwestern flank of the Cerro Domuyo, located in the northwest of the province of Neuquén, potent deposits of ignimbrites appear that lack previous studies. Based on the survey of profiles, observation of outcrops in the field, interpretation of satellite images and analysis of thin sections in the cabinet, a detailed map of the 1: 10000 scale study area was prepared. Eight facies corresponding to the Domuyo Volcanic Complex of the Middle Miocene - lower Pliocene could be identified, linked to the gravitational collapse of eruptive columns, although it is not ruled out that some or all of the welded facies may have a fissural origin.