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SUMMARY:Geological constraints on Himalaya - Tibet collision processes - M
 ike Searle (Oxford University)
DTSTART:20061108T163000Z
DTEND:20061108T173000Z
UID:TALK5491@talks.cam.ac.uk
CONTACT:4047
DESCRIPTION:Following the India-Asia collision approximately 50 million ye
 ars ago\, the Himalaya suffered over 500 km of crustal shortening mainly b
 y south-directed thrust stacking\, and uplift of the Tibetan Plateau was \
 nenhanced to its present ca 5 km elevation and c. 70-85 km crustal thickne
 ss. Two major processes have been widely cited and modeled\, firstly later
 al extrusion of the thickened crust of Tibet along large-scale strike-slip
  faults (eg: Karakoram\, Altyn Tagh\, Red River faults)\, and secondly sou
 thward ductile extrusion of partially molten middle crust of the Greater H
 imalaya (Channel Flow). This talk will \nexamine these two processes and t
 he geological and geochronological constraints on crustal deformation.
LOCATION:Marine/Wolfson Building lecture hall
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