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|Authors: ||Heinicke, J.*|
|Title: ||Seismogenic-influenced fluid transport on low angle faults to the mofettes of Caprese Michelangelo (Northern Apennines)|
|Issue Date: ||2005|
low angle fault
|Abstract: ||The reservoirs feeding those mofettes are trapped over-pressurized fluids, discovered
by a deep borehole in the near vicinity. Chemical and isotope data of both the venting
gases and gases from the drilled well provide indications about their origin. We discuss
a fault-valve behavior during the rupture process as responsible mechanism for a
co-seismic fluid migration along reactivated fractures zones. A migration of hypocenters
towards the surface along the fault gives further indications for a pore pressure
diffusion process. At the surface, the mofettes changed their morphological features
macroscopically due to this enhanced gas dynamic. The phenomenological observation
of post-seismic fluid expulsion 18 months after the seismic crisis suggests the
interpretation of a long-term fluid transport process forced by pressure pulse propagation.
This result was achieved by a new approach using photographical times series.
The proposed model could help to explain a complex scenario of a long-term fluid
transport from the trapped fluid reservoir through the seismogenic zone up to the gas
emission sites at Caprese Michelangelo.|
|Appears in Collections:||Conference materials|
04.04.12. Fluid Geochemistry
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