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

Author

Listed:
  • C. Beaumont

    (Dalhousie University)

  • R. A. Jamieson

    (Dalhousie University)

  • M. H. Nguyen

    (Dalhousie University
    Dalhousie University)

  • B. Lee

    (Dalhousie University)

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 plateau1,2,3, and that ductile extrusion of high-grade metamorphic rocks between coeval normal- and thrust-sense shear zones can explain exhumation of the Greater Himalayan sequence4,5,6,7. 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 system8,9,10.

Suggested Citation

  • C. Beaumont & R. A. Jamieson & M. H. Nguyen & B. Lee, 2001. "Himalayan tectonics explained by extrusion of a low-viscosity crustal channel coupled to focused surface denudation," Nature, Nature, vol. 414(6865), pages 738-742, December.
    • Handle: RePEc:nat:nature:v:414:y:2001:i:6865:d:10.1038_414738a
    DOI: 10.1038/414738a
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    Cited by:

    1. Zhang, Yong & Sun, HongGuang & Stowell, Harold H. & Zayernouri, Mohsen & Hansen, Samantha E., 2017. "A review of applications of fractional calculus in Earth system dynamics," Chaos, Solitons & Fractals, Elsevier, vol. 102(C), pages 29-46.
    2. Liang Liu & Lijun Liu & Jason. P. Morgan & Yi-Gang Xu & Ling Chen, 2023. "New constraints on Cenozoic subduction between India and Tibet," Nature Communications, Nature, vol. 14(1), pages 1-14, December.

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