Water in Parental Basaltic Magmas of Menshyi Brat Volcano (Iturup Island, Kurile Islands)

Autor:	I. R. Nizametdinov, D. V. Kuzmin, A. V. Rybin, Sergey Smirnov, I. Yu. Kulakov
Rok vydání:	2019
Předmět:	Basalt geography geography.geographical_feature_category Olivine 010504 meteorology & atmospheric sciences Spinel Geochemistry engineering.material 010502 geochemistry & geophysics 01 natural sciences Volcano Mineral redox buffer Magma Earth and Planetary Sciences (miscellaneous) engineering General Earth and Planetary Sciences Caldera Geology 0105 earth and related environmental sciences Melt inclusions
Zdroj:	Doklady Earth Sciences. 486:525-528
ISSN:	1531-8354 1028-334X
DOI:	10.1134/s1028334x19050052
Popis:	Data from the study of minerals of the liquidus association (olivine and spinel) from high-Mg basalts (up to 10 wt % MgO) of Menshyi Brat Volcano (Iturup Island) are reported. Based on these data, it was possible to estimate the water content and to study the evolution of volatile components in the primary basic magmas that formed the Medvezhia Caldera (Irurup Island), for the first time. It is shown that the initial water content in melts could reach 5 wt % at an oxygen fugacity corresponding to the NNO + 0.4 buffer. The further evolution of magmas included continuous degassing at a depth of ≤8 km. Hydrous fluid separated from basic magma could play a significant role in the formation of large crustal chambers of siliceous magma participation in catastrophic caldera eruptions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5e5322e23d7bfa3bab7a923ae083c30c https://doi.org/10.1134/s1028334x19050052 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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