Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/2074
Authors: Giammanco, S.* 
Gurrieri, S.* 
Valenza, M.* 
Title: Fault-controlled soil CO2 degassing and shallow magma bodies: summit and lower east rift of Kilauea volcano (Hawai’i)
Journal: Pure and Applied Geophysics 
Series/Report no.: 163
Publisher: Birkhauser Verlag, Basel
Issue Date: 2006
DOI: 10.1007/s00024-006-0039-9
Keywords: soil CO2
Kilauea
volcanic degassing
tectonic structures
geochemical surveying
Subject Classification04. Solid Earth::04.08. Volcanology::04.08.01. Gases 
Abstract: Soil CO2 flux measurements were carried out along traverses across mapped faults and eruptive fissures on the summit and the lower East Rift Zone of Kilauea volcano. Anomalous levels of soil degassing were found for 44 of the tectonic structures and 47 of the eruptive fissures intercepted by the surveyed profiles. This result contrasts with what was recently observed on Mt. Etna, where most of the surveyed faults were associated with anomalous soil degassing. The difference is probably related to the differences in the state of activity at the time when soil gas measurements were made: Kilauea was erupting, whereas Mt. Etna was quiescent although in a pre-eruptive stage. Unlike Mt. Etna, flank degassing on Kilauea is restricted to the tectonic and volcanic structures directly connected to the magma reservoir feeding the ongoing East Rift eruption or in areas of the Lower East Rift where other shallow, likely independent reservoirs are postulated. Anomalous soil degassing was also found in areas without surface evidence of faults, thus suggesting the possibility of previously unknown structures.
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