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Detailed Reference Information |
Caliro, S., Caracausi, A., Chiodini, G., Ditta, M., Italiano, F., Longo, M., Minopoli, C., Nuccio, P.M., Paonita, A. and Rizzo, A. (2004). Evidence of a recent input of magmatic gases into the quiescent volcanic edifice of Panarea, Aeolian Islands, Italy. Geophysical Research Letters 31: doi: 10.1029/2003GL019359. issn: 0094-8276. |
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On 2nd/3rd November 2002, a huge amount of gas, mainly composed of CO2, was suddenly released from the sea bottom off the coast of Panarea, producing a crater 20 by 10 meters wide and 7 meters deep. The gas output was estimated to be 109 l/d, two orders of magnitude higher than that measured in the 1980s. The anomalous degassing rate lasted for some weeks, slowly decreasing to an almost constant rate of about 4 ¿ 107 l/d after two months. The geo-thermo-barometric estimations revealed an increase of both the temperature and pressure in the geothermal system feeding the sampled vents. The 3He/4He ratios were similar to those measured in nearby Stromboli. We have monitored the area for the last two decades, and based on our intensive and extensive geochemical measurements, have ascertained that the geothermal reservoir has lost its steady state. We maintain that a new magmatic input caused these phenomena. |
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Abstract |
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Keywords
Geochemistry, Chemical evolution, Geochemistry, Isotopic composition/chemistry, Volcanology, Hydrothermal systems |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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