Strontium and oxygen isotopic systems in waters of mud volcanoes of the Taman Peninsula |
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| Authors: | M I Bujakaite V Yu Lavrushin B G Pokrovsky O E Kikvadze B G Polyak |
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| Institution: | 1. Geological Institute, Russian Academy of Sciences, Pyzhevskii per. 7, Moscow, 119017, Russia
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| Abstract: | Ten of eleven analyzed water samples from mud volcanoes of the Taman Peninsula are characterized by 87Sr/86Sr ratio within 0.70734–0.70957, which overlaps the values typical of the Mesozoic and Cenozoic sedimentary carbonates, but sharply differs from the value in the clayey sediments of the Maikop Group (0.7157 ± 0.0022). These data indicate that the strontium isotopic composition is mainly defined by carbonate reservoirs, with relatively little effect of elision solutions, input of which is noticeable only in the water of Gladkovsky Volcano (87Sr/86Sr = 0.71076). The high δ18O in mud volcanic waters (up to 14.2‰) can also be attributed to ionic exchange with sedimentary carbonates at temperatures around 150°C. |
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