Publikationsdatum:
2017-04-04
Beschreibung:
Geochemical investigations carried out at the Campano-Lucano
Apennine (Southern Italy) revealed the presence of fluids
composed of a mixing between components of shallow and
deep origin, where mantle-derived helium is also detectable.
For the gas phase, the deep component is represented by both
CH4 and CO2-rich gases, while the shallow one is N2-dominated.
Coinciding with the 3 April 1996 ML = 4.9 earthquake, the CH4-
rich component mixed with the shallow, NZ-dominated one at
the Tramutola well (Val dfAgri), displaying wide variations in
mixing proportions. In contrast, no significant modificationsoccurred in relation to the 1998 ML = 5.5 event. According to
the collected data, an earthquake-related transient modification
of local crustal permeability is suggested for the 1996
event. The different crustal response to the two events may be
related to different stress distributions around the epicentres or
may suggest a different tectonic connection between the Val
d'Agri and the two earthquake locations.
Beschreibung:
Published
Beschreibung:
249-257
Beschreibung:
3.2. Tettonica attiva
Beschreibung:
JCR Journal
Beschreibung:
reserved
Schlagwort(e):
fluids
;
seismicity
;
04. Solid Earth::04.04. Geology::04.04.12. Fluid Geochemistry
Repository-Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Materialart:
article
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