Redox evolution of a degassing magma rising to the surface

Alain Burgisser () and Bruno Scaillet
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Alain Burgisser: ISTO, UMR 6113 Université d’Orléans-CNRS
Bruno Scaillet: ISTO, UMR 6113 Université d’Orléans-CNRS

Nature, 2007, vol. 445, issue 7124, 194-197

Abstract: Volcanic gases can mislead The compositions of volcanic gases can be used by geologists to monitor volcanic activity or as a pointer to how the composition of the atmosphere has evolved with time. It is implicitly assumed that these gases faithfully reflect the conditions, in particular the redox state, of their source magma. But detailed physico-chemical modelling of the degassing processes reveals that this assumption is not generally valid and that the redox state of erupted magmas does not necessarily reflect the redox state of the gases emitted into the atmosphere.

Date: 2007
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DOI: 10.1038/nature05509

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