Facies analysis of an Eocene to Lower Miocene phreatomagmatic volcanic field in the Andes of Central Chile

July 13, 2019

International conference · 2019

Droguett, B., Clavero, J., Quiroga, R.

Published in: 27th IUGG General Assembly, sesión V18a Mapping Volcanoes, Montreal, Canadá. IUGG19-4880.
Institutions: Amawta Geoconsultores
Original language: English
Topics: Central Chile · Volcanology
Keywords: maar, phreatomagmatic, Abanico Formation, El Manzano

Abstract

First evidence of phreatomagmatic volcanism in the Abanico Formation: at least six maars aligned E–W and N–S at El Manzano, 50 km south-east of Santiago, with a facies model of the maar-diatreme systems.

Massive pyroclastic breccias and lapilli and ash tuffs are described, with dips ranging from gentle to almost vertical, together with deformed dykes mingled with the conduit fill. The facies map reconstructs the original geometry of the maars and their relationship with the regional geology.

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How to cite

Droguett, B., Clavero, J., Quiroga, R. (2019). Facies analysis of an Eocene to Lower Miocene phreatomagmatic volcanic field in the Andes of Central Chile. 27th IUGG General Assembly, sesión V18a Mapping Volcanoes, Montreal, Canadá. IUGG19-4880.