Dear colleagues,
Apologies for multiple postings.
We would like to draw your attention to the session *TS2.4 -Absolute
dating of the brittle deformation* (co-listed in *IG) *that will take
place at the EGU 2007 General Assembly meeting in Vienna (15-20 April).
*Absolute dating of the brittle deformation *
Progress in the understanding of both rates and duration of tectonic
processes are key to the physical modelling of earth processes. Of the
various structural levels, deformation in the brittle area remains very
difficult to date since resulting facies are rarely associated to
significant crystallization of neoformed minerals. At best the
geochronologists and structuralists are left with either very cold
brecciation or gouge facies, or at the contrary flash melting facies
such as pseudotachylites. Both facies are badly understood,
thermodynamically out of equilibrium, and largely dominated by inherited
geochemical, and mineralogical remnants. Paradoxically, along many major
tectonic features, deformation in the brittle zone is often the only
accessible exposure of deformation. It is the case for recent
deformation phases for example, when deep ductile facies have not been
exposed yet, typically along major continental shear zones. In general,
available analytical tools in geochronology, well handled when
concerning high temperature deformation phases, reveal themselves
inadequate when it concerns to date “cold” tectonics.
This session aims at gathering a multidisciplinary set of presentations
illustrating different problems and analytical solutions addressing the
dating of brittle deformation processes. Contributions can concern
direct dating of fault products as breccias, gouges or pseudotachylites,
thermochronology linking deformation with cooling paths, time-duration
of fault scarp exposures, etc.
_Important Deadlines:_
Support Application (financial): *08 December 2006 *
Abstract Submission: *15 January 2007*
General information about the conference can be found here:
http://meetings.copernicus.org/egu2007/
And about the session at:
http://www.cosis.net/members/meetings/programme/view.php?p_id=255
Sebastian Garcia – Freie Universität Berlin
Nicolas Arnaud – Université Montpellier 2
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Sebastian GARCIA
Freie Universität Berlin - FR Geologie
Haus B - Malteserstrasse 74-100
D-12249 Berlin
Tel: +49-(0)30-838-70391
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Sebastian GARCIA
Freie Universität Berlin - FR Geologie
Haus B - Malteserstrasse 74-100
D-12249 Berlin
Tel: +49-(0)30-838-70391
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