Conduit convection, magma mixing, and melt inclusion trends at persistently degassing volcanoes

Details Conduit convection, magma mixing, and melt inclusion trends at persistently degassing volcanoes Conduit convection, magma mixing, and melt inclusion trends at persistently degassing volcanoes

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011e%26psl.301..345w&link_type=abstract

Earth and Planetary Science Letters, Volume 301, Issue 1-2, p. 345-352.

Physics

2

Scientific paper

Magmas progressively exsolve volatiles as they ascend towards the Earth's surface, such that their volatile content is a function of pressure. Water and carbon dioxide concentrations measured in melt inclusions from degassing volcanoes rarely coincide with modelled degassing trends. I show that observed melt inclusion trends can be reproduced through mixing of magmas, either during convection within the volcanic conduit, or within a subterranean magma reservoir. No fluxing gas phase or post-entrapment loss of water need be invoked. A permeable network allowing gas transport is still required to avoid fragmentation of magma at shallow depths.

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