Initial H2O content and conditions of parent magma origin for Gorely volcano (Southern Kamchatka) estimated by trace element thermobarometry.

Nazarova, D. P., Portnyagin, Maxim V., Krasheninnikov, S. P., Mironov, N. L. and Sobolev, A. V. (2017) Initial H2O content and conditions of parent magma origin for Gorely volcano (Southern Kamchatka) estimated by trace element thermobarometry. Doklady Earth Sciences, 472 (1). pp. 100-103. DOI 10.1134/S1028334X1701024X.

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Abstract

The formation conditions of the parental magmas of Gorely volcano, which is located behind a volcanic front in Southern Kamchatka, have been evaluated using the modern methods of micro-element thermobarometry. These magmas contained 1.7 ± 0.8 (2σ) wt % of H2O, the majority (82%) of which has been lost from inclusions. They crystallized at 1121 ± 17°C and an oxygen fugacity of ΔQFM 1.2 ± 0.2, and could have been produced by about 11% melting of an enriched MORB source (E–DMM) at a temperature of about 1270°C, and a pressure of about 1.5 GPa. A distinctive feature of Gorely volcano, compared with frontal volcanoes of Kamchatka, is the unusually high temperature (925 ± 20°C) of formation of the subduction component corresponding to the region of existence of water-bearing melts.

Document Type: Article
Additional Information: WOS:000399720600022 - Original Russian Text © D.P. Nazarova, M.V. Portnyagin, S.P. Krasheninnikov, N.L. Mironov, A.V. Sobolev, 2017, published in Doklady Akademii Nauk, 2017, Vol. 472, No. 3, pp. 311–314.
Keywords: Initial H2O content, Conditions, Parent magma origin, Gorely volcano, Southern Kamchatka, Trace element thermobarometry
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1134/S1028334X1701024X
ISSN: 1028-334X
Date Deposited: 05 May 2017 09:31
Last Modified: 17 Jan 2019 13:20
URI: http://oceanrep.geomar.de/id/eprint/37760

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