Dear Colleagues,
Please consider submitting an abstract to session T46: Linking Shallow to Deep Crustal Processes in Arc and Collisional Orogens, which will convene at the Annual Meeting of the Geological Society of America in Portland, Oregon, from October 18-21, 2009. Abstracts can be submitted online at: http://www.geosociety.org/meetings/2009/ until August 11, 2009.
Brief Description:
Processes occurring in the mid-crust may be intimately connected to processes occurring in both the mantle and at the surface. Understanding lithospheric-processes rates and styles provides crucial information concerning the growth and collapse of orogens.
Rationale:
During orogenesis, there are a variety of different processes occurring from deep in the Earth to the surface that control the evolution of an orogen from crustal thickening to collapse. On the one hand, predictions drawn from the critical taper theory, from geologic evidence, and from numerical and experimental models indicate a primary role of erosion on the evolution of topography, internal deformation and exhumation, and show important feedback mechanisms that may lead to steady state. On the other hand, mantle processes can play important roles in providing heat to the lower crust, facilitating magmatism, partial melting, and crustal differentiation. Understanding the interaction between these layers is essential for understanding the evolution of orogens. In addition, the type of orogenesis (arc vs. collisional) highly influences the rate and types of processes and thus plays a role in the degree of coupling/decoupling. In order to provide a deeper understanding of the processes governing orogen's evolution, this session will be focused on contributions from the fields of petrology, geochronology, geomorphology, geophysics, neotectonics, and structural geology. Having data from all of these fields allows a complete assessment of the degree and nature of the interaction between different layers of the Earth.
Confirmed Speakers:
Douglas Burbank
Suzanne Baldwin
David Whipp
Regards,
Stacia Gordon
Leonardo Cruz
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Leonardo Cruz
Postdoctoral Scholar
Dept. Geological and Environmental Sciences
450 Serra Mall
Braun Hall, Building 320
Stanford University
Stanford, CA 94305-2115
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