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Coupling of rock uplift and river incision in the Namche Barwa-Gyala Peri massif, Tibet

2007; Geological Society of America; Volume: 120; Issue: 1-2 Linguagem: Inglês

10.1130/b26224.1

1943-2674

N. J. Finnegan, B. Hallet, D. R. Montgomery, Peter K. Zeitler, John O. Stone, Alison M. Anders, Yuping Liu,

Geology and Paleoclimatology Research

Research Article| January 01, 2008 Coupling of rock uplift and river incision in the Namche Barwa–Gyala Peri massif, Tibet Noah J. Finnegan; Noah J. Finnegan 1Department of Earth and Space Sciences and Quaternary Research Center, University of Washington, P.O. Box 351310, Seattle, Washington 98195, USA Search for other works by this author on: GSW Google Scholar Bernard Hallet; Bernard Hallet 1Department of Earth and Space Sciences and Quaternary Research Center, University of Washington, P.O. Box 351310, Seattle, Washington 98195, USA Search for other works by this author on: GSW Google Scholar David R. Montgomery; David R. Montgomery 1Department of Earth and Space Sciences and Quaternary Research Center, University of Washington, P.O. Box 351310, Seattle, Washington 98195, USA Search for other works by this author on: GSW Google Scholar Peter K. Zeitler; Peter K. Zeitler 2Department of Earth and Environmental Sciences, Lehigh University, 31 Williams Drive, Bethlehem, Pennsylvania 18015, USA Search for other works by this author on: GSW Google Scholar John O. Stone; John O. Stone 3Department of Earth and Space Sciences and Quaternary Research Center, University of Washington, P.O. Box 351310, Seattle, Washington 98195, USA Search for other works by this author on: GSW Google Scholar Alison M. Anders; Alison M. Anders 4Department of Geology, University of Illinois at Urbana-Champaign, 245 Natural History Building, 1301 West Green Street, Urbana, Illinois 61801, USA Search for other works by this author on: GSW Google Scholar Liu Yuping Liu Yuping 5Chengdu Institute of Geology and Mineral Resources, 2 Beisanduan, Yihuanlu, Chengdu 610081, Sichuan Province, China Search for other works by this author on: GSW Google Scholar Author and Article Information Noah J. Finnegan 1Department of Earth and Space Sciences and Quaternary Research Center, University of Washington, P.O. Box 351310, Seattle, Washington 98195, USA Bernard Hallet 1Department of Earth and Space Sciences and Quaternary Research Center, University of Washington, P.O. Box 351310, Seattle, Washington 98195, USA David R. Montgomery 1Department of Earth and Space Sciences and Quaternary Research Center, University of Washington, P.O. Box 351310, Seattle, Washington 98195, USA Peter K. Zeitler 2Department of Earth and Environmental Sciences, Lehigh University, 31 Williams Drive, Bethlehem, Pennsylvania 18015, USA John O. Stone 3Department of Earth and Space Sciences and Quaternary Research Center, University of Washington, P.O. Box 351310, Seattle, Washington 98195, USA Alison M. Anders 4Department of Geology, University of Illinois at Urbana-Champaign, 245 Natural History Building, 1301 West Green Street, Urbana, Illinois 61801, USA Liu Yuping 5Chengdu Institute of Geology and Mineral Resources, 2 Beisanduan, Yihuanlu, Chengdu 610081, Sichuan Province, China Publisher: Geological Society of America Received: 13 Mar 2007 Revision Received: 03 Sep 2007 Accepted: 05 Sep 2007 First Online: 08 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 The Geological Society of America, Inc. GSA Bulletin (2008) 120 (1-2): 142–155. https://doi.org/10.1130/B26224.1 Article history Received: 13 Mar 2007 Revision Received: 03 Sep 2007 Accepted: 05 Sep 2007 First Online: 08 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Noah J. Finnegan, Bernard Hallet, David R. Montgomery, Peter K. Zeitler, John O. Stone, Alison M. Anders, Liu Yuping; Coupling of rock uplift and river incision in the Namche Barwa–Gyala Peri massif, Tibet. GSA Bulletin 2008;; 120 (1-2): 142–155. doi: https://doi.org/10.1130/B26224.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Geodynamic modeling demonstrates the strong potential for erosion to influence the pattern and style of deformation in active mountain belts, but field studies yield conflicting views on the importance of erosion in influencing orogenesis. Here we compare patterns in river power, inferred excess fluvial-transport capacity, topographic relief, precipitation, and mineral-cooling ages to assess the coupling between surface erosion and rock uplift within the vicinity of the Namche Barwa–Gyala Peri massif, an active antiformal structure within the eastern Himalayan syntaxis. Our rich and dense data set reveals a tight spatial correspondence of fluvial incision potential, high relief, and young cooling ages. The spatial coincidence is most easily explained by a sustained balance between rock uplift and denudation driven by river incision over at least the last ∼1 m.y. The Yarlung Tsangpo–Brahmaputra River is the largest and most powerful river in the Himalaya, and two lines of evidence point to its active role in the dynamic interaction of local erosion, rock uplift, thermal weakening of the lithosphere, and deformation: (1) Whereas along the rest of the Himalayan front, high relief and high rock uplift rates are essentially continuous, the high relief and rapid exhumation in the syntaxis is restricted to a "bull's-eye" pattern exactly where the largest river in the Himalaya, the Yarlung Tsangpo–Brahmaputra, has the most energy per unit area available to erode its channel and transport sediment. (2) The location of rapid incision on the Yarlung Tsangpo–Brahmaputra has been pinned for at least 1 m.y., and without compensatory uplift of the Namche Barwa–Gyala Peri massif during this time the river would have eroded headward rapidly, incising deeply into Tibet. 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