Dear colleagues,
We would like to draw your attention about the session TS1.1 of EGU
meeting to come in Vienna (19-24 April 2009)
Brittle deformation of granular materials (with
implications for porosity and permeability evolution)
A detailed description of the session can be found below and
on
http://meetingorganizer.copernicus.org/EGU2009/session/925
ABSTRACT SUBMISSION DEADLINE JANUARY 13th 2009
Please, feel free to contact one of us for further
information
Hoping to see you in Vienna,
Fabrizio Balsamo [log in to unmask]
Zoe Shipton
[log in to unmask]
Fabrizio Storti [log in to unmask]
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Summary of the session
Granular materials (e.g. sandstones, poorly lithified and
unconsolidated sediments, cataclastic rocks and fault gouge) undergo
brittle deformation at shallow crustal levels with different mechanisms
depending on the stress field configuration, pore fluid pressure, and
their initial petrophysical properties (grain size and shape,
mineralogical composition, porosity, degree of cementation etc.).
Deformation of granular materials produces mm- to regional-scale
structural and permeability heterogeneities which impact fault frictional
properties and subsurface fluid flow. Understanding the factors that
control the deformation mechanisms and resulting structures in granular
materials is essential to define the fault zone permeability structure in
groundwater, geothermal and petroleum reservoirs, as well as in nuclear
waste storage, CO2 sequestration and seismic hazard. This session is
focused on the description and quantitative characterization of the
internal structure of fault zones developed in granular materials at both
brittle and soft-sediment conditions, as well as on other deformation
structures such as liquefaction-induced deformational feature.
Information on the porosity and permeability evolution during progressive
deformation is encouraged. Contributions from field work, laboratory
tests and numerical studies from various disciplines and with different
methodological approaches are invited to discuss the relationships
between deformation mechanisms and permeability distributions across and
along fault zones during progressive deformation.
° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° ° °
° ° °
Fabrizio Balsamo
Dipartimento di Scienze Geologiche
Università degli Studi Roma Tre
L.go S. L. Murialdo 1, 00146, Roma- Italy
tel. +39 06 5733 8049
fax +39 06 5733 8201
[log in to unmask]
