By Richard D. Law

This choice of 27 evaluate and learn papers presents an outline of the geodynamic suggestions of channel stream and ductile extrusion in continental collision zones. the point of interest for this quantity is the concept that the center or reduce crust acts as a ductile, partly molten channel flowing out from underneath components of over-thickened crust, resembling the Tibetan plateau, in the direction of the topographic floor at plateau margins. This debatable notion explains many positive factors with regards to the geodynamic evolution of the plateau and, for instance, extrusion and exhumation of the crystalline center of the Himalayan mountain chain to the south. during this quantity thermal-mechanical types for channel movement, extrusion and exhumation are provided, and geological and geophysical facts either for and opposed to the applicability of such versions to the Himalayan-Tibetan Plateau procedure, in addition to older continental collision zones akin to the Hellenides, the Appalachians and the Canadian Cordillera, are mentioned.

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HARRISON, T. M. 1999. Relationship between leucogranites and the Qomolangma detachment in the Rongbuk valley, South Tibet. Geology, 27, 831-834. MYROW, P. , HUGHES. N. , PAULSEN, T. , ETAL. 2003. Integrated tectonostratigraphic analysis of the Himalaya and implications for its tectonic reconstruction. Earth and Planetary Science Letters, 212, 433-441. NAZURCHUK, J. H. 1993. Structure and geochronology of the Greater Himalaya, Kali Gandaki region, west-central Nepal. MSc thesis, Carleton University.

PAULSEN, T. , ETAL. 2003. Integrated tectonostratigraphic analysis of the Himalaya and implications for its tectonic reconstruction. Earth and Planetary Science Letters, 212, 433-441. NAZURCHUK, J. H. 1993. Structure and geochronology of the Greater Himalaya, Kali Gandaki region, west-central Nepal. MSc thesis, Carleton University. NELSON, K. , BROWN, L. , ETAL. 1996. Partially molten middle crust beneath southern Tibet; synthesis of Project INDEPTH results. Science, 274, 1684-1688. NOBLE, S.

1029/2002TC001363. , EDWARDS, M. , KIDD, W. S. , H~_USLER, D. & WANGDA, D. 2002. , DE DRESSER, J. H. P. & PENNOCK, G. M. (eds) Deformation Mechanisms, Rheology and Tectonics: Current Status and Future Perspectives. Geological Society, London, Special Publications, 200, 371-386. , KELLEY, S. &; HARRIS, N. 2001. Age and composition of dikes in Southern Tibet: New constraints on the timing of east-west extension and its relationship to postcollisional volcanism. Geology, 29, 339-342. WILLIAMS, P. F.

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