REINTERPRETACIÓN DE DEPÓSITOS VOLCANICLÁSTICOS (?) POST-GLACIARES DEL VOLCÁN COPAHUE: IMPORTANCIA EN LA EVALUACIÓN DEL RIESGO

- CASELLI, A.T.; DAGA R.; BAEZ A.

Tucuman

Congreso; XX Congreso Geológico Argentino; 2017

Asociación Geológica Argentina

Copahue is an active volcano located in the Neuquén Andes, at the Argentina-Chile limit, close to Caviahue and Copahue towns. Two deposits assigned to density currents from Copahue are reinterpreted. (i) A historical deposit located in the eastern flank of the volcano, originally described as a lahar product from the 1992-1995 eruptive cycle, and recently reinterpreted as a pyroclastic density current deposit assigned to the 2000 eruption; and (ii) a Holocene deposit located north of Caviahue Lake, originally described as a product of pyroclastic density currents. For the first one, we conclude a genesis coincident with its original description (lahar), while the second one is reinterpreted as of lacustrine origin with an important contribution of volcanoclastic material. These results are important to consider when analyzing the volcanic risk in the area.