We draw to your attention the following two sessions at the upcoming EGU
meeting in Vienna, 07--12 April 2013 (http://www.egu2013.eu/), for which
the abstract deadline is 09 January 2013
(http://www.egu2013.eu/abstract_management/how_to_submit_an_abstract.html).
We plan to run both sessions back to back, allowing for a sizable "Early
Earth" program at the EGU in 2013.
GMPV1
Origin, evolution of Earth's crust and the formation of a habitable
planet (co-sponsored by GMPV and AGU-VGP)
Convener: Stephen J. Mojzsis
Co-Conveners: Elizabeth Swanner , Pierre Bouilhol , Bruno Dhuime ,
Michael Brown
This session will explore how direct observations from the rock record,
insights from theoretical models, experimental results and phase
equilibria modeling can be used to provide constraints on the origin and
evolution of the Earth's crust and the physical and chemical conditions
imparted by the crust that constrained the development of life. We
welcome contributions that may address the following issues: geodynamic
conditions for the formation and recycling of primary crust through
time; the tectonic setting and rates of formation, recycling and
destruction of the continental crust through time; and, the relationship
between melt production and ocean/atmospheric development. Also welcomed
are studies that use the crust as a paradigm to search for evidence of
early life and constrain the nature of near surface environments.
GD2.1/GMPV2/TS11.4
Archean tectonics: an enduring enigma
Convener: Jean-François Moyen
Co-Conveners: Jeroen van Hunen , Patrice Rey , Guillaume Richard
The tectonic regime of the Archean Earth is an enduring enigma. Despite
decades of Archean studies, there is still no consensus on the planetary
tectonic modes. Did plate tectonics exist in the Archean? If it did, how
much did it differ from today's patterns? If it did not, what tectonic
style was in operation?
A key issue is the difficulty to integrate geological observations into
a continent-scale, or planet-scale model. Magmatic, metamorphic and
structural patterns can be described on a regional basis; but
integrating them in a larger-scale framework is a difficult task. On the
other hand geodynamic models describe typically mantle-wide processes,
and commonly lack the spatial and geological details allowing to make
predictions that could be compared with geological observations.
This session aims at bringing together members from different
communities, interested in the question of Archaean tectonics. We
welcome contributions from the fields of geodynamics, petrology,
geochemistry, tectonics, etc.; provided these contributions aim at
linking observations at different scales, or bridging the gap between
different approaches.
__________________________________________________________
Michael Brown, Professor of Geology
Department of Geology
Geology Building (#237)
University of Maryland
College Park
MD 20742-4211
USA
[log in to unmask]
http: www.geol.umd.edu
Dept. office: 301 405 4082; Direct line: 301 405 4080
Direct fax: 301 314 7970; Dept. fax: 301 314 9661
LABORATORY FOR CRUSTAL PETROLOGY (Information at:
http: www.geol.umd.edu/pages/faculty/BROWN/LCP/lcp.htm)
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