Geological constraints on Himalaya - Tibet collision processes
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Following the India-Asia collision approximately 50 million years ago, the Himalaya suffered over 500 km of crustal shortening mainly by south-directed thrust stacking, and uplift of the Tibetan Plateau was
enhanced to its present ca 5 km elevation and c. 70-85 km crustal thickness. Two major processes have been widely cited and modeled, firstly lateral extrusion of the thickened crust of Tibet along large-scale strike-slip faults (eg: Karakoram, Altyn Tagh, Red River faults), and secondly southward ductile extrusion of partially molten middle crust of the Greater Himalaya (Channel Flow). This talk will
examine these two processes and the geological and geochronological constraints on crustal deformation.
This talk is part of the Bullard Laboratories Wednesday Colloquia series.
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