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SUMMARY:Zooming into the subduction plate interface:  constraints from pet
 rology\, geodynamics and modelling - Philippe Agard\, University Paris VI
DTSTART:20111108T163000Z
DTEND:20111108T173000Z
UID:TALK33168@talks.cam.ac.uk
CONTACT:John Maclennan
DESCRIPTION:Brief summary: \nSubduction zones are crucial areas for unders
 tanding lithospheric-scale coupling between plates\, risk assessment\, or 
 vertical movements and material recycling on Earth. In recent years a weal
 th of geophysical (low-velocity layers on top of most subducting slabs\, p
 artly serpentinized mantle wedge tips\, ETS and fluid release...) and petr
 ological data (including detailed T-depth-time-fluid evolutions) were gath
 ered and\, together with increasingly detailed thermomechanical models\, s
 hed light on subduction dynamics and exhumation models.\nYet\, in detail\,
  the nature and structure of the subduction interface are still poorly con
 strained: e.g.\, which lithologies and mixed to which extent? which rheolo
 gies? which fluids and where? what is their exact bearing on earthquake ru
 ptures? etc…\nI herein focus on showing how the fate of oceanic crustal 
 slices along the subduction interface provides further insights into inter
 plate mechanical coupling and element transfer in subduction zones.
LOCATION:Harker 1 seminar room\, Department of Earth Sciences
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