Himalayan tectonics explained by extrusion of a low-viscosity crustal channel coupled to focused surface denudation

Details Himalayan tectonics explained by extrusion of a low-viscosity crustal channel coupled to focused surface denudation Himalayan tectonics explained by extrusion of a low-viscosity crustal channel coupled to focused surface denudation

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001natur.414..738b&link_type=abstract

Nature, Volume 414, Issue 6865, pp. 738-742 (2001).

Physics

200

Scientific paper

Recent interpretations of Himalayan-Tibetan tectonics have proposed that channel flow in the middle to lower crust can explain outward growth of the Tibetan plateau, and that ductile extrusion of high-grade metamorphic rocks between coeval normal- and thrust-sense shear zones can explain exhumation of the Greater Himalayan sequence. Here we use coupled thermal-mechanical numerical models to show that these two processes-channel flow and ductile extrusion-may be dynamically linked through the effects of surface denudation focused at the edge of a plateau that is underlain by low-viscosity material. Our models provide an internally self-consistent explanation for many observed features of the Himalayan-Tibetan system.

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