COPAHUE VOLCANO (ARGENTINA): A relationship between ground deformation, seismic activity and geochemical changes

CASELLI A.T., VÉLEZ M.L., AGUSTO M.R., BENGOA C.L., EUILLADES P.A. AND IBÁÑEZ J.M.

THE VOLUME PROYECT VOLcanoes: Understanding subsurface mass moveMEnt

VOLUME Project Consortium

Lugar: DUBLIN; Año: 2009; p. 309 - 318

<!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} @page Section1 {size:595.3pt 841.9pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:35.4pt; mso-footer-margin:35.4pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> Copahue volcano is an active stratovolcano, with a hot acidic crater lake. This is the main expression of the magmatic hydrothermal system. The properties of the lake water respond to chemical and physical changes in the subsurface hydrothermal or magmatic system. In this region, significant seismic activity at the beginning of 2004 was recorded. After these events several surface manifestations were recognized; the temperature of crater lake decrease, the composition of springs changed and surface deformation on the northeastern flank of the volcanic edifice were recorded. Herein, a relationship between ground deformation, seismic activity and geochemical variations is established.