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Carbonate stable and clumped isotopic evidence for late Eocene moderate to high elevation of the east-central Tibetan Plateau and its geodynamic implications

2018; Geological Society of America; Volume: 131; Issue: 5-6 Linguagem: Inglês

10.1130/b32060.1

1943-2674

Lin Li, Majie Fan, Nathaniel Davila, Greg Jesmok, Bryce Mitsunaga, Aradhna Tripati, Devon A. Orme,

Geological and Geophysical Studies

Research Article| November 28, 2018 Carbonate stable and clumped isotopic evidence for late Eocene moderate to high elevation of the east-central Tibetan Plateau and its geodynamic implications Lin Li; Lin Li † 1Department of Earth and Environmental Sciences, University of Texas at Arlington, Arlington, Texas 76019, USA †li.lin8611@gmail.com Search for other works by this author on: GSW Google Scholar Majie Fan; Majie Fan 1Department of Earth and Environmental Sciences, University of Texas at Arlington, Arlington, Texas 76019, USA Search for other works by this author on: GSW Google Scholar Nathaniel Davila; Nathaniel Davila 2Department of Earth, Planetary, and Space Sciences, and Department of Atmospheric and Oceanic Sciences, Institute of the Environment and Sustainability, University of California, Los Angeles, California 90095, USA Search for other works by this author on: GSW Google Scholar Greg Jesmok; Greg Jesmok 2Department of Earth, Planetary, and Space Sciences, and Department of Atmospheric and Oceanic Sciences, Institute of the Environment and Sustainability, University of California, Los Angeles, California 90095, USA Search for other works by this author on: GSW Google Scholar Bryce Mitsunaga; Bryce Mitsunaga 2Department of Earth, Planetary, and Space Sciences, and Department of Atmospheric and Oceanic Sciences, Institute of the Environment and Sustainability, University of California, Los Angeles, California 90095, USA Search for other works by this author on: GSW Google Scholar Aradhna Tripati; Aradhna Tripati 2Department of Earth, Planetary, and Space Sciences, and Department of Atmospheric and Oceanic Sciences, Institute of the Environment and Sustainability, University of California, Los Angeles, California 90095, USA3European Institute of Marine Sciences (IUEM), Université de Brest, UMR 6538, Domaines Océaniques, Rue Dumont D'Urville, and Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), 29280 Plouzané, France Search for other works by this author on: GSW Google Scholar Devon Orme Devon Orme 4Department of Earth Sciences, Montana State University, Bozeman, Montana 59717, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Lin Li † 1Department of Earth and Environmental Sciences, University of Texas at Arlington, Arlington, Texas 76019, USA Majie Fan 1Department of Earth and Environmental Sciences, University of Texas at Arlington, Arlington, Texas 76019, USA Nathaniel Davila 2Department of Earth, Planetary, and Space Sciences, and Department of Atmospheric and Oceanic Sciences, Institute of the Environment and Sustainability, University of California, Los Angeles, California 90095, USA Greg Jesmok 2Department of Earth, Planetary, and Space Sciences, and Department of Atmospheric and Oceanic Sciences, Institute of the Environment and Sustainability, University of California, Los Angeles, California 90095, USA Bryce Mitsunaga 2Department of Earth, Planetary, and Space Sciences, and Department of Atmospheric and Oceanic Sciences, Institute of the Environment and Sustainability, University of California, Los Angeles, California 90095, USA Aradhna Tripati 2Department of Earth, Planetary, and Space Sciences, and Department of Atmospheric and Oceanic Sciences, Institute of the Environment and Sustainability, University of California, Los Angeles, California 90095, USA3European Institute of Marine Sciences (IUEM), Université de Brest, UMR 6538, Domaines Océaniques, Rue Dumont D'Urville, and Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), 29280 Plouzané, France Devon Orme 4Department of Earth Sciences, Montana State University, Bozeman, Montana 59717, USA †li.lin8611@gmail.com Publisher: Geological Society of America Received: 26 Mar 2018 Revision Received: 08 Jul 2018 Accepted: 21 Sep 2018 First Online: 28 Nov 2018 Online Issn: 1943-2674 Print Issn: 0016-7606 © 2018 Geological Society of America GSA Bulletin (2019) 131 (5-6): 831–844. https://doi.org/10.1130/B32060.1 Article history Received: 26 Mar 2018 Revision Received: 08 Jul 2018 Accepted: 21 Sep 2018 First Online: 28 Nov 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Lin Li, Majie Fan, Nathaniel Davila, Greg Jesmok, Bryce Mitsunaga, Aradhna Tripati, Devon Orme; Carbonate stable and clumped isotopic evidence for late Eocene moderate to high elevation of the east-central Tibetan Plateau and its geodynamic implications. GSA Bulletin 2018;; 131 (5-6): 831–844. doi: https://doi.org/10.1130/B32060.1 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 The topographic history of mountain belts reflects changes in lithospheric structure and rheology and exerts an influence on climate. Although substantial progress has been made to constrain the growth history of the southern Tibetan Plateau, the timing and geodynamic drivers for surface uplift of the central plateau remain poorly constrained. Here, we used both carbonate clumped isotope geothermometry and modified stable isotope–based paleoaltimetry that considers proportional mixing of two major moisture sources to infer late Eocene paleoelevations of the Nangqian Basin in the east-central Tibetan Plateau. The mean clumped isotope temperature, T(Δ47), of minimally altered late Eocene lacustrine carbonates is 30.0 °C, and the reconstructed least-evaporated paleowater δ18Omw value is –9.8‰. These two independent approaches indicate that during late Eocene time, the Nangqian Basin floor was 2.7 (+0.6/–0.4) km above sea level, and the hypsometric mean elevation of surrounding mountains was 3.0 ± 1.1 km above sea level. These estimates are 1.1–1.2 km lower than their modern counterparts. The moderate to high late Eocene paleoelevation of the Nangqian Basin suggests that Eocene upper-crustal shortening and thickening can explain most, but not all, of the surface uplift of the east-central Tibetan Plateau. The additional 1.1–1.2 km (at most) of post–late Eocene elevation increase to the present height may have been a result of either lower-crustal flow or slab detachment. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.