By Richard D. Law
This choice of 27 assessment and examine papers presents an outline of the geodynamic techniques of channel movement and ductile extrusion in continental collision zones. the focus for this quantity is the suggestion that the center or reduce crust acts as a ductile, in part molten channel flowing out from underneath components of over-thickened crust, reminiscent of the Tibetan plateau, in the direction of the topographic floor at plateau margins. This debatable concept explains many gains 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 versions for channel stream, extrusion and exhumation are awarded, and geological and geophysical facts either for and opposed to the applicability of such versions to the Himalayan-Tibetan Plateau process, in addition to older continental collision zones reminiscent of the Hellenides, the Appalachians and the Canadian Cordillera, are mentioned.
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Extra info for Channel flow, ductile extrusion and exhumation in continental collision zones
P. & GODIN, L. (eds) Channel Flow, Ductile Extrusion and Exhumation in Continental Collision Zones. Geological Society, London, Special Publications, 268, 255-267. ROBINSON, D. , DECELLES, P. , PATCHETT, P. J. & GARZIONE, C. N. 2001. The kinematic evolution of the Nepalese Himalaya interpreted from Nd isotopes. Earth and Planetary Science Letters, 192, 507. 22 L. GODIN ETAL. ROSENBERG, C. L. & HANDY, M. R. 2005. Experimental deformation of partially melted granite revisited: implications for the continental crust.
Geological Society of America Bulletin, 113, 222-240. HuSSON, L. & SEMPERE,T. 2003. Thickening the Altiplano crust by gravity-driven crustal channel flow. Geophysical Research Letters, 30, 1243. 1029/2002GL016877. INGER, S. 1998. Timing of an extensional detachment during convergent orogeny: new Rb-Sr geochronological data from the Zanskar shear zone, northwestern Himalaya. Geology, 26, 223-226. , BEAUMONT,C. & GEMMER,L. 2004. Numerical modeling of salt tectonics on passive continental margins: Preliminary assessment of the effects of sediment loading, buoyancy, margin tilt, and isostasy.
JIANG, D. 2005. An investigation of lower crustal deformation: Evidence for channel flow and its implications for tectonics and structural studies. Journal of Structural Geology, 27, 1486-1504. WILLIAMS,P. , JIANG,D. & tiN, S. 2006. Interpretation of deformation fabrics of infrastructure zone rocks in the context of channel flow and other tectonic models. In: LAW, R. , SEARLE,M. P. & GODIN, L. (eds) Channel Flow, Ductile Extrusion and Exhumation in Continental Collision Zones. Geological Society, London, Special Publications, 268, 221-235.