2010•AGU Fall Meeting AbstractsRequires access
Flow Direcion of Debris Avalanche at Aguilucho-Apacheta Volcanic Complex (aavc), Central Andes
Benigno Emilio Godoy Neira, Felipe Aguilera, S. Ahumada, Joel A. Mercado‐Díaz
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Abstract
Aguilucho-Apacheta (5,581 and 5,283 m a.s.l., respectively) is a volcanic complex located in the Andean Central Volcanic Zone (CVZ) at the 21o50’ Lat S and 68o10’ Long W. During its evolution, AAVC underwent a collapse of the eastern part of the main edifice originated by hydrothermal alteration and controlled by tectonic activity present in the zone. This collapse generated a debris-avalanche deposit (DAD) which is distributed towards the eastern flank of the volcanic complex. This DAD has an area of ca. 3 km, an extended length up to 4.27 km and a relative run-out coefficent (H/L) of 0.23. It is confined between two older andesitic-to-dacitic lava flows and is constituted by andesitic-to-dacitic lavas, hydrothermally altered lava and hydrothermal breccias fragments.