Explosive volcanism:Observations and processes

Rothery, David A. and Glaze, Lori S. and Wilson, Lionel (2021) Explosive volcanism:Observations and processes. In: Planetary Volcanism across the Solar System. Elsevier, Oxford, pp. 115-160. ISBN 9780128139882

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Abstract

Wherever effusive volcanism has occurred, there is usually also evidence of explosive volcanism. The boundaries between these two kinds of eruption are blurred, because even the sources of lava flows, regarded as the classic effusive landform, may exhibit explosive activity. In the absence of an atmosphere, the expansion of gas (derived from volatiles either dissolved in or encountered by the magma) is uninhibited once any bubbles have burst, and explosively ejected particles of all sizes follow ballistic trajectories once they are clear of any gas jet. An atmosphere impedes bubble expansion, decelerates smaller ballistic particles preferentially compared with larger ones, and introduces the possibility of a convective plume (i.e., an eruption column) able to loft fine particles to much greater heights than would be possible ballistically. Atmospheres also enable the formation of ground-hugging pyroclastic density currents that have no equivalents on airless bodies.

Item Type:
Contribution in Book/Report/Proceedings
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Publisher Copyright: © 2022 Elsevier Inc. All rights reserved.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200
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ID Code:
183745
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Deposited On:
13 Jan 2023 12:15
Refereed?:
No
Published?:
Published
Last Modified:
13 Jan 2023 12:15