[iris-bulk] South America Upper Mantle and Geodynamics
IRIS
irismail at iris.washington.edu
Fri Jan 26 08:57:02 PST 2007
We would like to draw your attention to session S02 of the next AGU
Latin American Joint Assembly, Acapulco, Mexico, 22-25 May 2007.
S02 Upper Mantle Structure and Geodynamics of the South American Plate
South America is unique in having the longest continuously-active
subduction of oceanic lithosphere beneath continental lithosphere
available for study. The long history of subduction along western
South America implies its subcontinental mantle lithosphere and
mantle wedge have been affected by widely varying convergence
conditions and slab morphology. Thus, observations of crustal and
upper mantle structure of South America, and geodynamic modeling of
this subduction history and attendant effects are important avenues
to better understanding the dynamics of the plate. Recent
seismologic field experiments and new geodynamic analysis tools are
refining our perception of South America's upper mantle structure and
composition and their relationships to its plate motion history and
structural evolution. We welcome contributions regarding all aspects
of South American crustal and upper mantle structure and geodynamics,
including those relevant to the nature of the strong low-velocity
anomalies in the sub-Andean asthenospheric wedge; relationships
between asthenospheric wedge development and Andean deformation;
structure and composition of South America's ancient cratons; upper
mantle seismic anisotropy, petrofabrics, and geodynamic history;
mantle temperature; seismic attenuation and rheology; the geometry
and extent of the subducted Nazca plate; slab morphology and fate;
and Caribbean-South America interaction.
Conveners: Marcelo Assumpcao (Univ. Sao Paulo, Brazil), Suzan van der
Lee (Northwestern Univ., USA), Ray Russo (Florida Univ., USA)
Important date: Abstract deadline March 1st, 2007
More info at http://www.agu.org/meetings/ja07/
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