Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6439954 | Journal of Volcanology and Geothermal Research | 2015 | 14 Pages |
Abstract
Our results provide information on the hydrothermal system in the eastern sector of the caldera that was not among the goals in the previous drilling programs. Secondary mineralization suggests a saline hydrothermal environment characterized by fluids that progressively evolved from boiling toward more alkaline and cooler conditions. A paleo-temperature of ca. 160 °C has been inferred from authigenic mineral occurrences and calculated on the basis of equilibria between cored calcites and fluids presently emitted at the surface, by using carbon and oxygen isotope data. The temperature measured at the bottom of the drilling is about 80 °C.
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Physical Sciences and Engineering
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Authors
A. Mormone, C. Troise, M. Piochi, G. Balassone, M. Joachimski, G. De Natale,