Hello all,
A reminder! We would like to bring to your attention the following
session to be held at the Fall AGU this year (5-9 December, abstract
deadline 8th September). The session, listed under Volcanology,
Geochemistry and Petrology, is co-sponsored together with
Tectonophysics and Seismology. We are planning the session so it
will represent the spectrum from petrology to tectonics and from
geochronology to geophysics. We want to bring together a variety of
different studies that can address dynamics of orogenic belts from
various viewpoints from within the community.
Our invited speakers for the session are Wayne Thatcher, USGS, Mark
Handy, Freie Universitat Berlin, and Greg Houseman, University of
Leeds.
http://www.agu.org/meetings/fm05/
Apologies for duplicate listings!
V15: Transient versus Long-Term Strength Changes in the Continental
Lithosphere: Freezing and Thawing of the Jelly Sandwich?
Convened by Rob Butler (Leeds) and Tracy Rushmer (Vermont)
The strength of the deep continental crust relative to the overlying
upper crust and underlying upper mantle and its ability to localize
strain is a matter of hot debate. Are constant rheology models
appropriate? What are the roles of mineral reactions, bulk
composition, fluid ingress, magmatism and textural changes in
changing the strength of the deep continental crust? How do transient
effects interact with longer-term structural inheritance and
reactivation? Gaining answers to these and other questions is
critical to understanding how deformation in the upper crust, such as
are mapped geodetically, couple with tectonics in the mantle. The
increased use of quantitative studies of strain partitioning in
exhumed deep crustal analogues, together with increased precision of
thermo-geochronological methods, and geochemical studies of fluid
fluxes have provided better understanding of ancient examples. In
modern examples, in situ detection of deformed and deforming crust
are increasingly within the reach of seismological experiments and
recent experimental data provide better understanding of the
relationships between deformation, metamorphism and melting.
Consequently it has been of great interest to geoscientists recently
to develop multi-disciplinary approaches to understanding deformation
through the continental lithosphere and the role of the deep crust in
coupling mantle to upper crustal deformation. For fall AGU 2005 we
invite submissions on this topic to the special session to
Volcanology, Petrology and Geochemistry with co-sponsorship by
Tectonophysics and Seismology. We will bring together a variety of
studies that can address dynamics of orogenic belts from different
viewpoints, including geochemical and structural approaches together
with insights from seismology and numerical modelling. We anticipate
that the session will attract interest across the spectrum from
petrology to tectonics and from geochronology to geophysics, and that
it will include contributions from field-based research, experiments
and geodynamic modeling.
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______________________________
Tracy Rushmer
Department of Geology
Delehanty Hall
Trinity Campus
University of Vermont, Burlington, Vermont
05405
Phone (direct): (802) 656-8136
(secretary): (802) 656-3396
