Rouwet, D and Bellomo, S and Brusca, L and Inguaggiato, S and Jutzeler, M and Mora, R and Mazot, A and Bernard, R and Cassidy, M and Taran, Y, Major and trace element geochemistry of El Chichon volcano-hydrothermal system (Chiapas, Mexico) in 2006-2007: implications for future geochemical monitoring, Geofisica Internacional, 48, (1) pp. 55-72. ISSN 0016-7169 (2009) [Refereed Article]
Copyright 2009 Institute of Geophysics, UNAM
Official URL: http://www.scielo.org.mx/revistas/geoint/eaboutj.h...
Isotopic, major and trace element composition studies for the crater lake, the Soap Pool and thermal springs at El Chichón volcano in November 2006–October 2007 confirm the complex relationship between annual rainfall distribution and crater lake volume and chemistry. In 2001, 2004 and 2007 high volume high–Cl lake may be related to reactivation of high discharge (>10 kg/s) saline near–neutral water from the Soap Pool boiling springs into the lake, a few months (~January) after the end of the rainy season (June–October). The peak lake volume occurred in March 2007 (~6 x 105 m3).
Agua Tibia 2 thermal springs discharge near the foot of the SW dome but their chemistry suggests a lower temperature regime, an enhanced water–rock interaction and basement contribution (evaporites and carbonates), anhydrite leaching from the 1982 pyroclastic deposits, rather than dome activity. New suggestions of crater lake seepage are evidenced by the Agua Caliente thermal springs.
Existing models on the "crater lake–Soap Pool spring" and the deep hydrothermal system are discussed. Chemical changes in the deep geothermal aquifer feeding the thermal springs may predict dome rise. Future volcanic surveillance should focus on spring chemistry variations, as well as crater lake monitoring.
|Item Type:||Refereed Article|
|Keywords:||El Chichon, geoquimica de fluidos, monitoreo volcanico|
|Research Division:||Earth Sciences|
|Objective Division:||Expanding Knowledge|
|Objective Group:||Expanding Knowledge|
|Objective Field:||Expanding Knowledge in the Earth Sciences|
|UTAS Author:||Jutzeler, M (Dr Martin Jutzeler)|
|Web of Science® Times Cited:||17|
|Deposited By:||Earth Sciences|
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