Copahue's southwest face with Laguna Las Totoras in the foreground.
|Elevation||2,997 m (9,833 ft)|
|Location||Argentina and Chile|
|Last eruption||2013 (ongoing)|
Copahue (Spanish pronunciation: [koˈpawe]) is a stratovolcano nestled on the border between Argentina and Chile. There are nine volcanic craters along a 2 km (1.2 mi) line, and the eastern summit crater contains a briny, acidic 300 m (1000 ft) wide crater lake. Twentieth-century eruptions from the crater lake have ejected pyroclastic rocks and chilled liquid sulfur fragments.Copahue means "sulphur waters" in Mapuche.
Copahue sits on a basement of sedimentary and volcanic rocks ranging in age from Eocene to Pliocene. The modern volcano sits in a volcanically active area, with a caldera from the Pliocene, measuring 20 km by 15 km, lying to the east of Copahue.
The modern structure is an elongated shield volcano, with a maximum thickness of 22 km and a minimum of 8 km. There have been at least six eruptions within the Holocene, with the most recent on December 22, 2012. The easternmost (and most active) crater contains a crater lake with a pH ranging between 0.18 and 0.30. Although the lake emptied during the 2000 eruption, it has returned to its previous levels.
On 27 May 2013, it was reported that a red alert had been issued and the evacuation of around 2,000 people was to begin.
- "Copahue". Global Volcanism Program, Smithsonian Institution. http://www.volcano.si.edu/world/volcano.cfm?vnum=1507-09%3D. Retrieved 2005-02-11.
- "Chile and Argentina on alert over Copahue volcano eruption". BBC News. 23 December 2012.
- Naranjo, Jose; Polanco, Edmundo (2004). "The 2000 AD eruption of Copahue Volcano, Southern Andes". Revisita Geologica de Chile 31 (2): 279–292.
- González-Ferrán, Oscar (1995). Volcanes de Chile. Santiago, Chile: Instituto Geográfico Militar. p. 640 pp. ISBN 956-202-054-1. (in Spanish; also includes volcanoes of Argentina, Bolivia, and Peru)
- Biggar, John (2005). The Andes: A Guide for Climbers (3rd ed.). Andes Publishing (Scotland). p. 304 pp. ISBN 0-9536087-2-7.
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