Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/2543
AuthorsSepe, V.* 
Atzori, S.* 
Ventura, G.* 
TitleSubsidence due to crack closure and depressurization of hydrothermal systems: a case study from Mt. Epomeo (Ischia Island, Italy)
Issue Date2007
Series/Report no.19
DOI10.1111/j.1365-3121.2006.00727.x
URIhttp://hdl.handle.net/2122/2543
Keywordsfluid flow
fracture
Subject Classification04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring 
AbstractLevelling surveys carried out between 1990 and 2003 on the Mt Epomeo resurgent block (Ischia Island) record negative dislocations on its northern and southern flanks with a maximum subsidence rate of 1.27 cm yr)1. This deformation is not associated with the cooling, crystallization or lateral drainage of magma and cannot be explained by a pressure point or prolate ellipsoid source. Results from dislocation models and the available structural and geochemical information indicate that the subsidence is due to crack closure processes along two main ENE–WSW and E–W preexisting faults, which represent the preferred pathway of CO2 degassing from the hydrothermal system located beneath Mt Epomeo. The monitoring of the dislocations and CO2 flux along these faults could give useful information on the dynamics of the hydrothermal system.
Appears in Collections:Papers Published / Papers in press

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