[IRIS] T28: Crustal fabric, seismic anisotropy, and deformation

[Anne Sheehan]

Dear Colleagues:

We would like to draw your attention to a special session entitled 
"T28: Crustal fabric, seismic anisotropy, and deformation" at the 
Fall 2006 AGU annual meeting to be held December 11-15, 2006 in San 
Francisco, CA, USA. We hope to attract researchers from across 
disciplines (seismology, structural geology, petrology, mineral 
physics, etc.) to share and discuss ideas about observations, 
interpretations, and deformation-related causes of seismic anisotropy 
in middle and lower continental crust. A more detailed description of 
the session is included at the end of this message. 

Please contact one of the conveners, Vera Schulte-Pelkum 
(vera_sp at cires.colorado.edu), Kevin Mahan (kmahan at gps.caltech.edu), 
or Anne Sheehan (afs at cires.colorado.edu), if you have any questions 
about this session.

The electronic abstract deadline is September 7, 2006. If you are 
interested in participating, please submit your abstract to session 
T28. Submissions may be made online at 
http://www.agu.org/meetings/fm06

Thank you and please pass this on to those who might be interested.

T28:    Crustal Fabric, Seismic Anisotropy, and Deformation

Seismic observations of crustal anisotropy have the potential to 
provide critical constaints on continental deformation processes. 
This session focuses on crustal fabric development and its influence 
on seismic anisotropy. We hope to integrate mineralogy, petrology, 
structural geology, and seismology, by spanning the scale from 
deformation experiments and determination of elasticity tensors and 
wavespeeds in the laboratory to structural geology and seismological 
observations. We welcome contributions such as field geological 
studies of mid- and deep-crustal exposures in conjunction with 
laboratory or observational studies of seismic anisotropy, laboratory 
measurements of anisotropy from natural and/or experimentally 
deformed crustal materials under pressure with ultrasound, as well as 
seismic anisotropy inferred from lattice preferred orientations, the 
influence of composite deformation fabrics on seismic observables, 
changes in anisotropy related to strain gradients, pro- and 
retro-grade metamorphism, and evolving mineral assemblages, numerical 
modelling of seismic anisotropy, especially based on laboratory 
measurements and/or structural geology, and crustal seismic 
anisotropy observations from active and passive sources, especially 
in context with tectonics. Several Tibetan Plateau and the ongoing 
USArray seismic experiments provide an opportunity to examine crustal 
anisotropy across a wide range of tectonic environments, and 
contributions related to these areas are particularly welcome.