Publication Date:
2017-04-03
Description:
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.
Description:
Published
Description:
853-867
Description:
reserved
Keywords:
Soil CO2
;
Kilauea
;
volcanic degassing
;
tectonic structures
;
geochemical surveying
;
04. Solid Earth::04.08. Volcanology::04.08.06. Volcano monitoring
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
Format:
464566 bytes
Format:
application/pdf
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