Spectroscopic evidence for a lava fountain driven by previously accumulated magmatic gas

Patrick Allard (), Mike Burton and Filippo Muré
Additional contact information
Patrick Allard: INGV
Mike Burton: INGV
Filippo Muré: INGV

Nature, 2005, vol. 433, issue 7024, 407-410

Abstract: Etna turns up the gas The eruption of Mount Etna in 2000 was notable for an exceptional series of 64 periodic lava fountains, propelling lava fragments to heights of up to 900 metres. It has been difficult to determine which of two suggested sources of power — gas release from the magma itself during its rapid ascent or a build-up of pressure from gas accumulated at depth — is the driving force for these dramatic jets. But one of the Etna fountains provided volcanologists with the opportunity to use remote sensing (not that remote; see picture on the following page) to determine the infrared spectra of the gas phase. This revealed the chemical composition of the gas that powered this fountain as consistent with an origin in an accumulated gas layer.

Date: 2005
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DOI: 10.1038/nature03246

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