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Deep-sea eruptions boosted by induced fuel-coolant explosions

Citation

Durig, T and White, JDL and Murch, AP and Zimanowski, B and Buttner, R and Mele, D and Dellino, P and Carey, RJ and Schmidt, LS and Spitznagel, N, Deep-sea eruptions boosted by induced fuel-coolant explosions, Nature Geoscience, 13, (7) pp. 498-503. ISSN 1752-0894 (2020) [Refereed Article]

Copyright Statement

The Author(s), under exclusive licence to Springer Nature Limited 2020

DOI: doi:10.1038/s41561-020-0603-4

Abstract

The majority of Earth's volcanic eruptions occur beneath the sea, but the limited number of direct observations and samples limits our understanding of these unseen events. Subaerial eruptions lend some insight, but direct extrapolation from the subaerial to the deep sea is precluded by the great differences in pressure, thermal conditions, density and rheology, and the interplay among them. Here we present laboratory fragmentation experiments that mimic deep-sea explosive eruptions and compare our laboratory observations with those from the kilometre-deep submarine eruption of Havre Volcano, Kermadec Arc, New Zealand, in 2012. We find that the Havre eruption involved explosive fragmentation of magma by a pressure-insensitive interaction between cool water and hot magma, termed an induced fuel-coolant interaction. The laboratory experiments show that this water-magma interaction is initiated by the formation of cracks in cooling magma into which the water coolant can infiltrate, driving explosive fragmentation. Explosive submarine eruptions have previously been considered unlikely because stabilization of a vapour film at the magma-water contact was thought to be a key requirement but is suppressed at depths exceeding 100 m. However, here we demonstrate that these induced fuel-coolant interactions between magma and water can occur in a range of wet environments regardless of pressure, from the subaerial to the deep sea, and may operate on different planets, as well as apply to materials other than magma and water.

Item Details

Item Type:Refereed Article
Keywords:submarine eruption, fragmentation, volcano
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:141127
Year Published:2020
Funding Support:Australian Research Council (DE150101190)
Web of Science® Times Cited:4
Deposited By:Earth Sciences
Deposited On:2020-09-27
Last Modified:2020-10-09
Downloads:0

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