DECADE - Deep Carbon Degassing from Two Active Volcanic Systems in Patagonia (Argentina): Copahue and Planchon-Peteroa Project uri icon

DCO ID 11121/8438-3853-1032-6594-CC


  • During the March 2014 fieldwork, several activities were carried out at Copahue and Peteroa. We evaluated the degassing unrest that has characterized Copahue after the December 2012 events. Diffuse CO2 soil degassing from five thermal areas was estimated by the accumulation chamber method in >100 ton/day of CO2. More precise evaluations will be provided shortly. Remote sensing studies by UV, DOAS, and MultiGas cameras were carried out to estimate the amount of gases released by the volcanic lake, which formed after the latest eruption. The data are to be processed, although preliminary estimates indicate >800 ton/day of SO2 discharged from the crater. Data about other gases, e.g., CO2, H2, will be available shortly. Gas and water (including the crater lake) sampling was conducted in the most important fumarolized areas. Chemical and isotopic analyses are in progress. Two seismic stations were deployed. At Peteroa, the adverse weather conditions reduced the scientific activities. We got to the top of the crater, covered by clouds, from where the 2010-2011 eruption started. The activity has decreased with respect to the last survey (March 2012). A MultiGas device was deployed along with passive and active filters. The data processing is under way.