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

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      Nature

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          Abstract

          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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          Author and article information

          Journal
          Nature
          Nature
          0028-0836
          0028-0836
          Dec 13 2001
          : 414
          : 6865
          Affiliations
          [1 ] Department of Oceanography, Dalhousie University, Halifax, Nova Scotia, Canada, B3H 4J1.
          Article
          414738a
          10.1038/414738a
          11742396
          2dc1135c-87d5-40a1-a0e6-81665131defa
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