Initial H2O content and conditions of parent magma origin for Gorely volcano (Southern Kamchatka) estimated by trace element thermobarometry
作者： D. P. Nazarova , M. V. Portnyagin , S. P. Krasheninnikov , N. L. Mironov , A. V. Sobolev
DOI: 10.1134/S1028334X1701024X
关键词: Magma 、 Geology 、 Subduction 、 Trace element 、 Geochemistry 、 Volcano 、 Mineral redox buffer
摘要: The formation conditions of the parental magmas Gorely volcano, which is located behind a volcanic front in Southern Kamchatka, have been evaluated using modern methods micro-element thermobarometry. These contained 1.7 ± 0.8 (2σ) wt % H2O, majority (82%) has lost from inclusions. They crystallized at 1121 17°C and an oxygen fugacity ΔQFM 1.2 0.2, could produced by about 11% melting enriched MORB source (E–DMM) temperature 1270°C, pressure 1.5 GPa. A distinctive feature compared with frontal volcanoes unusually high (925 20°C) subduction component corresponding to region existence water-bearing melts.
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