Initial H2O content and conditions of parent magma origin for Gorely volcano (Southern Kamchatka) estimated by trace element thermobarometry
- 作者: Nazarova D.1, Portnyagin M.1,2, Krasheninnikov S.1, Mironov N.1, Sobolev A.1,3
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隶属关系:
- Vernadsky Institute of Geochemistry and Analytical Chemistry
- GEOMAR Helmholtz Centre for Ocean Research
- Université Grenoble Alpes
- 期: 卷 472, 编号 1 (2017)
- 页面: 100-103
- 栏目: Geochemistry
- URL: https://journals.rcsi.science/1028-334X/article/view/189415
- DOI: https://doi.org/10.1134/S1028334X1701024X
- ID: 189415
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详细
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.
作者简介
D. Nazarova
Vernadsky Institute of Geochemistry and Analytical Chemistry
编辑信件的主要联系方式.
Email: nazarova2405@rambler.ru
俄罗斯联邦, Moscow, 119991
M. Portnyagin
Vernadsky Institute of Geochemistry and Analytical Chemistry; GEOMAR Helmholtz Centre for Ocean Research
Email: nazarova2405@rambler.ru
俄罗斯联邦, Moscow, 119991; Kiel
S. Krasheninnikov
Vernadsky Institute of Geochemistry and Analytical Chemistry
Email: nazarova2405@rambler.ru
俄罗斯联邦, Moscow, 119991
N. Mironov
Vernadsky Institute of Geochemistry and Analytical Chemistry
Email: nazarova2405@rambler.ru
俄罗斯联邦, Moscow, 119991
A. Sobolev
Vernadsky Institute of Geochemistry and Analytical Chemistry; Université Grenoble Alpes
Email: nazarova2405@rambler.ru
俄罗斯联邦, Moscow, 119991; Grenoble