North-south extension in the Tibetan crust triggered by granite emplacement

Abstract

Research Article| November 01, 2005 North-south extension in the Tibetan crust triggered by granite emplacement Mutsuki Aoya; Mutsuki Aoya 1Institute of Geology and Geoinformation, National Institute of Advanced Industrial Science and Technology, Central 7, Tsukuba 305-8567, Japan Search for other works by this author on: GSW Google Scholar Simon R. Wallis; Simon R. Wallis 2Department of Earth and Planetary Sciences, Graduate School of Environmental Studies, Nagoya University, Nagoya 464-8602, Japan Search for other works by this author on: GSW Google Scholar Kentaro Terada; Kentaro Terada 3Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, Hiroshima 739-8526, Japan Search for other works by this author on: GSW Google Scholar Jeffrey Lee; Jeffrey Lee 4Department of Geological Sciences, Central Washington University, Ellensburg, Washington 98926, USA Search for other works by this author on: GSW Google Scholar Tetsuo Kawakami; Tetsuo Kawakami 5Department of Earth Sciences, Faculty of Education, Okayama University, Okayama 700-8530, Japan Search for other works by this author on: GSW Google Scholar Yu Wang; Yu Wang 6Department of Geology, China University of Geosciences, Beijing 100083, China Search for other works by this author on: GSW Google Scholar Matt Heizler Matt Heizler 7New Mexico Bureau of Mines and Mineral Resources, New Mexico Tech, 801 Leroy Place, Socorro, New Mexico 87801-4796, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Mutsuki Aoya 1Institute of Geology and Geoinformation, National Institute of Advanced Industrial Science and Technology, Central 7, Tsukuba 305-8567, Japan Simon R. Wallis 2Department of Earth and Planetary Sciences, Graduate School of Environmental Studies, Nagoya University, Nagoya 464-8602, Japan Kentaro Terada 3Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, Hiroshima 739-8526, Japan Jeffrey Lee 4Department of Geological Sciences, Central Washington University, Ellensburg, Washington 98926, USA Tetsuo Kawakami 5Department of Earth Sciences, Faculty of Education, Okayama University, Okayama 700-8530, Japan Yu Wang 6Department of Geology, China University of Geosciences, Beijing 100083, China Matt Heizler 7New Mexico Bureau of Mines and Mineral Resources, New Mexico Tech, 801 Leroy Place, Socorro, New Mexico 87801-4796, USA Publisher: Geological Society of America Received: 20 Apr 2005 Revision Received: 04 Jul 2005 Accepted: 06 Jul 2005 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2005) 33 (11): 853–856. https://doi.org/10.1130/G21806.1 Article history Received: 20 Apr 2005 Revision Received: 04 Jul 2005 Accepted: 06 Jul 2005 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Mutsuki Aoya, Simon R. Wallis, Kentaro Terada, Jeffrey Lee, Tetsuo Kawakami, Yu Wang, Matt Heizler; North-south extension in the Tibetan crust triggered by granite emplacement. Geology 2005;; 33 (11): 853–856. doi: https://doi.org/10.1130/G21806.1 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 We combine zircon sensitive high-resolution ion microprobe U-Pb spot dating and mica 40Ar-39Ar plateau ages with field-geological and geochemical constraints from the Mala shan area of Southern Tibet to show that the deformed granite core of the North Himalayan metamorphic domes in this area is not Indian basement, but was intruded and deformed during the Himalayan orogeny. Microstructural observations reveal that a transition from top-to-the-south thrust-related to top-to-the-north extension-related deformation occurred during granite intrusion and related metamorphism. This suggests that intrusion triggered the onset of extensional tectonics in the Tibetan middle to upper crust. Expected positive feedback mechanisms between decompression melting leading to more intrusion and more extensional deformation suggest that this mechanism may have been important on a regional scale. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.