Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4597
AuthorsScaillet, B.* 
Pichavant, M.* 
Cioni, R.* 
TitleUpward migration of Vesuvius magma chamber over the past 20,000 years
Issue Date11-Sep-2008
Series/Report no./445(2008)
DOI10.1038/nature07232
URIhttp://hdl.handle.net/2122/4597
Keywordsvesuvius
magma chamber
experimental petrology
Subject Classification04. Solid Earth::04.01. Earth Interior::04.01.02. Geological and geophysical evidences of deep processes 
04. Solid Earth::04.08. Volcanology::04.08.02. Experimental volcanism 
04. Solid Earth::04.08. Volcanology::04.08.03. Magmas 
AbstractForecasting future eruptions of Vesuvius is an important challenge for volcanologists, as its reawakening could threaten the lives of 700,000 people living near the volcano. Critical to the evaluation of hazards associated with the next eruption is the estimation of the depth of the magma reservoir, one of the main parameters controlling magma properties and eruptive style. Petrological studies have indicated that during past activity, magma chambers were at depths between 3 and 16 km. Geophysical surveys have imaged some levels of seismic attenuation, the shallowest of which lies at 8–9 km depth, and these have been tentatively interpreted as levels of preferential magma accumulation. By using experimental phase equilibria, carried out on material from four main explosive events at Vesuvius, we show here that the reservoirs that fed the eruptive activity migrated from 7–8 km to 3–4 km depth between the AD 79 (Pompeii) and AD 472 (Pollena) events. If data from the Pomici di Base event 18.5 kyr ago and the 1944 Vesuvius eruption are included, the total upward migration of the reservoir amounts to 9–11 km. The change of preferential magma ponding levels in the upper crust can be attributed to differences in the volatile content and buoyancy of ascending magmas, as well as to changes in local stress field following either caldera formation or volcano spreading. Reservoir migration, and the possible influence on feeding rates, should be integrated into the parameters used for defining expected eruptive scenarios at Vesuvius.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
N_Scaillet et al_2008.pdf253.28 kBAdobe PDFView/Open
Show full item record

Page view(s)

78
Last Week
0
Last month
checked on Jun 23, 2017

Download(s)

23
checked on Jun 23, 2017

Google ScholarTM

Check

Altmetric