Intraplate extension prior to continental extrusion along the Ailao Shan-Red River shear zone

Research Article| April 01, 1997 Intraplate extension prior to continental extrusion along the Ailao Shan-Red River shear zone Sun-Lin Chung; Sun-Lin Chung 1Department of Geology, National Taiwan University, Taipei 106-17, Taiwan Search for other works by this author on: GSW Google Scholar Tung-Yi Lee; Tung-Yi Lee 2Department of Earth Sciences, National Taiwan Normal University, Taipei, Taiwan Search for other works by this author on: GSW Google Scholar Ching-Hua Lo; Ching-Hua Lo 1Department of Geology, National Taiwan University, Taipei 106-17, Taiwan Search for other works by this author on: GSW Google Scholar Pei-Ling Wang; Pei-Ling Wang 1Department of Geology, National Taiwan University, Taipei 106-17, Taiwan Search for other works by this author on: GSW Google Scholar Chin-Yu Chen; Chin-Yu Chen 2Department of Earth Sciences, National Taiwan Normal University, Taipei, Taiwan Search for other works by this author on: GSW Google Scholar Nguyen Trong Yem; Nguyen Trong Yem 3Institute of Geological Sciences, National Center for Natural Sciences and Technology, Hanoi, Vietnam Search for other works by this author on: GSW Google Scholar Tran Trong Hoa; Tran Trong Hoa 3Institute of Geological Sciences, National Center for Natural Sciences and Technology, Hanoi, Vietnam Search for other works by this author on: GSW Google Scholar Wu Genyao Wu Genyao 4Institute of Geology, Chinese Academy of Sciences, Beijing, China Search for other works by this author on: GSW Google Scholar Author and Article Information Sun-Lin Chung 1Department of Geology, National Taiwan University, Taipei 106-17, Taiwan Tung-Yi Lee 2Department of Earth Sciences, National Taiwan Normal University, Taipei, Taiwan Ching-Hua Lo 1Department of Geology, National Taiwan University, Taipei 106-17, Taiwan Pei-Ling Wang 1Department of Geology, National Taiwan University, Taipei 106-17, Taiwan Chin-Yu Chen 2Department of Earth Sciences, National Taiwan Normal University, Taipei, Taiwan Nguyen Trong Yem 3Institute of Geological Sciences, National Center for Natural Sciences and Technology, Hanoi, Vietnam Tran Trong Hoa 3Institute of Geological Sciences, National Center for Natural Sciences and Technology, Hanoi, Vietnam Wu Genyao 4Institute of Geology, Chinese Academy of Sciences, Beijing, China Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1997) 25 (4): 311–314. https://doi.org/10.1130/0091-7613(1997)025<0311:IEPTCE>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Sun-Lin Chung, Tung-Yi Lee, Ching-Hua Lo, Pei-Ling Wang, Chin-Yu Chen, Nguyen Trong Yem, Tran Trong Hoa, Wu Genyao; Intraplate extension prior to continental extrusion along the Ailao Shan-Red River shear zone. Geology 1997;; 25 (4): 311–314. doi: https://doi.org/10.1130/0091-7613(1997)025<0311:IEPTCE>2.3.CO;2 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 Left-lateral movement of the Ailao Shan–Red River shear zone lends support to the hypothesis of continental extrusion resulting from the collision of India with Asia. Our new observations from northwestern Yunnan, China, and northwestern Vietnam on different sides of the shear zone demonstrate that the sinistral offset was ∼600 km according to correlations of Permian-Triassic flood basalt successions and late Paleogene highly potassic mafic magmas. We conclude that the shear was propagating on the South China continental margin and does not correspond to a suture between South China and Indochina. Furthermore, the highly potassic magmas were emplaced from ca. 40 to 30 Ma, before the shear movement, which was caused by the late Oligocene to early Miocene (ca. 27–22 Ma) extrusion activity. This suggests that a late Eocene to early Oligocene intraplate extension, possibly induced by delamination of thickened continental lithosphere, took place in northwestern Yunnan (or eastern Tibet) as a response to the India-Asia collision. This extension, and sea-floor spreading of the South China Sea that began ca. 30 Ma, could have accounted for the initiation of the Ailao Shan–Red River shear zone. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.