Dynamics of exrtrusive dome growth and variations in chemical and mineralogical composition of Young Shiveluch andesites in 2001–2013

Gorbach, N. V., Portnyagin, Maxim V. and Philosofova, T. M. (2016) Dynamics of exrtrusive dome growth and variations in chemical and mineralogical composition of Young Shiveluch andesites in 2001–2013 Journal of Volcanology and Seismology, 10 (6). pp. 360-381. DOI 10.1134/S0742046316060038.

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Abstract

This paper discribes characteristic features of the extrusive dome growth of the Young Shiveluch Volcano in 2001–2013 and analyzes variations in the chemical and mineralogic composition of magmas erupted during this period. It is shown that, compared with the earlier phases in the dome growth during 1980–1981 and 1993–1995, the andesites that were erupted in the 2000s are less homogeneous in bulk composition, crystal contents and contain phenocrysts, which differ in composition and the conditions of crystallization. These compositional feature of rocks are interpreted as resulting from convection in a shallow magma chamber, with the convection being caused by the arrival of a fresh portion of deep magma.

Document Type: Article
Additional Information: Original Russian Text © N.V. Gorbach, M.V. Portnyagin, T.M. Philosofova, 2016, published in Vulkanologiya i Seismologiya, 2016, No. 6, pp. 37–61.
Keywords: Kamchatka, Shiveluch, island-arc, explosive volcanism, andesite
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems
Refereed: Yes
DOI etc.: 10.1134/S0742046316060038
ISSN: 0742-0463
Date Deposited: 06 Jan 2017 09:09
Last Modified: 03 May 2017 11:18
URI: http://eprints.uni-kiel.de/id/eprint/35495

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