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Transition of eruptive style: pumice raft to dome-forming eruption at the Havre submarine volcano, southwest Pacific Ocean
Citation
Manga, M and Mitchell, SJ and Degruyter, W and Carey, RJ, Transition of eruptive style: pumice raft to dome-forming eruption at the Havre submarine volcano, southwest Pacific Ocean, Geology, 46, (12) pp. 1075-1078. ISSN 0091-7613 (2018) [Refereed Article]
Copyright Statement
Copyright 2018 Geological Society of America
DOI: doi:10.1130/G45436.1
Abstract
Transitions in eruptive style are common at volcanoes. Understanding how and why these transitions occur remain open questions. The 2012 eruption of the submarine Havre volcano in the Kermadec arc (southwest Pacific Ocean) produced a raft of floating pumice followed by a pair of domes from the same vent. Here, we used measurements on erupted magmas and constraints on the eruption rate, combined with a model for magma ascent, to identify the dominant controls on the transition in eruption style. During the raft-forming stage, magma ascent was fast enough that little gas was lost. Magma reached the seafloor with great enough vesicularity to be buoyant and produce clasts that could float. As the eruption waned, the eruption rate decreased, and the conduit narrowed. Sufficient gas was then lost to the surrounding country rocks during ascent such that the erupted magma was no longer buoyant relative to seawater. Most of the original dissolved water in the magma was lost to the crust surrounding the conduit during the dome-forming stage.
Item Details
Item Type: | Refereed Article |
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Keywords: | submarine eruption, havre, dome, pumice |
Research Division: | Earth Sciences |
Research Group: | Geology |
Research Field: | Volcanology |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the earth sciences |
UTAS Author: | Carey, RJ (Associate Professor Rebecca Carey) |
ID Code: | 129401 |
Year Published: | 2018 |
Funding Support: | Australian Research Council (DE150101190) |
Web of Science® Times Cited: | 7 |
Deposited By: | Earth Sciences |
Deposited On: | 2018-11-28 |
Last Modified: | 2019-03-13 |
Downloads: | 0 |
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