The Shiveluch Volcanic Massif,Kamchatka: Stages in the Evolution of a Magmatic System: Results of Geochronological and Thermobarogeochemical Studies |
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| Authors: | M M Pevzner M L Tolstykh A D Babansky |
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| Institution: | 1.Geological Institute,Russian Academy of Sciences,Moscow,Russia;2.Vernadsky Institute of Geochemistry and Analytical Chemistry,Russian Academy of Sciences,Moscow,Russia;3.Institute of the Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | It is shown that Shiveluch, which consists of several volcanic edifices that stand in one area and in part overlie each other, is a long-lived volcanic massif with a complex structure. The available data on the morphology of the edifice, age, rock compositions, primary melts, and types of eruptive activity were used to identify structurally-temporal units (STUs) in the Shiveluch volcanic massif. It was found that the generation of different-age STUs was due to the activity of at least four magma chambers with different parameters. The durations of the individual chambers were determined. The activities of these chambers were initiated and came to an end nearly instantaneously because of major collapse episodes in the edifice of the massif due to high-magnitude earthquakes. |
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