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Dominance of tectonics over climate in Himalayan denudation

2014; Geological Society of America; Volume: 42; Issue: 3 Linguagem: Inglês

10.1130/g35342.1

1943-2682

Vincent Godard, Didier Bourlès, F. Spinabella, D. W. Burbank, Bodo Bookhagen, G. Burch Fisher, Adrien Moulin, Laëtitia Léanni,

Geological and Geochemical Analysis

Research Article| March 01, 2014 Dominance of tectonics over climate in Himalayan denudation Vincent Godard; Vincent Godard 1Aix-Marseille Université, CNRS, IRD, CEREGE UM34, 13545 Aix-en-Provence, France Search for other works by this author on: GSW Google Scholar Didier L. Bourlès; Didier L. Bourlès 1Aix-Marseille Université, CNRS, IRD, CEREGE UM34, 13545 Aix-en-Provence, France Search for other works by this author on: GSW Google Scholar Françoise Spinabella; Françoise Spinabella 1Aix-Marseille Université, CNRS, IRD, CEREGE UM34, 13545 Aix-en-Provence, France Search for other works by this author on: GSW Google Scholar Douglas W. Burbank; Douglas W. Burbank 2Earth Research Institute, University of California–Santa Barbara, Santa Barbara, California 93106, USA Search for other works by this author on: GSW Google Scholar Bodo Bookhagen; Bodo Bookhagen 2Earth Research Institute, University of California–Santa Barbara, Santa Barbara, California 93106, USA Search for other works by this author on: GSW Google Scholar G. Burch Fisher; G. Burch Fisher 2Earth Research Institute, University of California–Santa Barbara, Santa Barbara, California 93106, USA Search for other works by this author on: GSW Google Scholar Adrien Moulin; Adrien Moulin 1Aix-Marseille Université, CNRS, IRD, CEREGE UM34, 13545 Aix-en-Provence, France Search for other works by this author on: GSW Google Scholar Laëtitia Léanni Laëtitia Léanni 1Aix-Marseille Université, CNRS, IRD, CEREGE UM34, 13545 Aix-en-Provence, France Search for other works by this author on: GSW Google Scholar Author and Article Information Vincent Godard 1Aix-Marseille Université, CNRS, IRD, CEREGE UM34, 13545 Aix-en-Provence, France Didier L. Bourlès 1Aix-Marseille Université, CNRS, IRD, CEREGE UM34, 13545 Aix-en-Provence, France Françoise Spinabella 1Aix-Marseille Université, CNRS, IRD, CEREGE UM34, 13545 Aix-en-Provence, France Douglas W. Burbank 2Earth Research Institute, University of California–Santa Barbara, Santa Barbara, California 93106, USA Bodo Bookhagen 2Earth Research Institute, University of California–Santa Barbara, Santa Barbara, California 93106, USA G. Burch Fisher 2Earth Research Institute, University of California–Santa Barbara, Santa Barbara, California 93106, USA Adrien Moulin 1Aix-Marseille Université, CNRS, IRD, CEREGE UM34, 13545 Aix-en-Provence, France Laëtitia Léanni 1Aix-Marseille Université, CNRS, IRD, CEREGE UM34, 13545 Aix-en-Provence, France Publisher: Geological Society of America Received: 01 Aug 2013 Revision Received: 29 Nov 2013 Accepted: 04 Dec 2013 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2014 Geological Society of America Geology (2014) 42 (3): 243–246. https://doi.org/10.1130/G35342.1 Article history Received: 01 Aug 2013 Revision Received: 29 Nov 2013 Accepted: 04 Dec 2013 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Vincent Godard, Didier L. Bourlès, Françoise Spinabella, Douglas W. Burbank, Bodo Bookhagen, G. Burch Fisher, Adrien Moulin, Laëtitia Léanni; Dominance of tectonics over climate in Himalayan denudation. Geology 2014;; 42 (3): 243–246. doi: https://doi.org/10.1130/G35342.1 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 SocietyGeology Search Advanced Search Abstract Landscape denudation in actively deforming mountain ranges is controlled by a combination of rock uplift and surface runoff induced by precipitation. Whereas the relative contribution of these factors is important to our understanding of the evolution of orogenic topography, no consensus currently exists concerning their respective influences. To address this question, denudation rates at centennial to millennial time scales were deduced from 10Be concentrations in detrital sediments derived from 30 small basins (10–600 km2) in an ∼200-km-wide region in central Nepal. Along a northward, strike-perpendicular transect, average denudation rates sharply increase from <0.5 mm/yr in the Lesser Himalayas to ∼1 mm/yr when crossing the Physiographic Transition, and then accelerate to 2–3 mm/yr on the southern flank of the high peaks in the Greater Himalayas. Despite a more than five-fold increase in denudation rate between the southern and northern parts of this transect, the corresponding areas display similar precipitation rates. The primary parameter that presents a significant co-variation with denudation is the long-term rock-uplift rate that is interpreted to result from the ramp-flat transition along the Main Himalayan Thrust. We propose that, in this rapidly uplifting mountain range, landscapes adjust quickly to changing climatic conditions, such that denudation is mainly limited by the rate at which material is pushed upward by tectonic processes and made available for removal by surface processes. In this particular context, variations in precipitation appear to have only a second-order role in modulating the denudation signal that is primarily set by the background rock-uplift rate. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.