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A 6000-km-long Neo-Tethyan arc system with coherent magmatic flare-ups and lulls in South Asia

2019; Geological Society of America; Volume: 47; Issue: 6 Linguagem: Inglês

10.1130/g46172.1

1943-2682

Xiaoran Zhang, Sun‐Lin Chung, Yu‐Ming Lai, Azman A. Ghani, Sayed Murtadha, Hao-Yang Lee, Chun-Chieh Hsu,

Geological and Geochemical Analysis

Research Article| April 17, 2019 A 6000-km-long Neo-Tethyan arc system with coherent magmatic flare-ups and lulls in South Asia Xiaoran Zhang; Xiaoran Zhang * 1Institute of Earth Sciences, Academia Sinica, Taipei 11529, Taiwan *E-mails: zxr627@163.com; sunlin@ntu.edu.tw Search for other works by this author on: GSW Google Scholar Sun-Lin Chung; Sun-Lin Chung * 1Institute of Earth Sciences, Academia Sinica, Taipei 11529, Taiwan2Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan *E-mails: zxr627@163.com; sunlin@ntu.edu.tw Search for other works by this author on: GSW Google Scholar Yu-Ming Lai; Yu-Ming Lai 3Department of Earth Sciences, National Taiwan Normal University, Taipei 11677, Taiwan Search for other works by this author on: GSW Google Scholar Azman A. Ghani; Azman A. Ghani 4Department of Geology, University of Malaya, 50603 Kuala Lumpur, Malaysia Search for other works by this author on: GSW Google Scholar Sayed Murtadha; Sayed Murtadha 5Department of Geology, Syiah Kuala University, Banda Aceh 23111, Indonesia Search for other works by this author on: GSW Google Scholar Hao-Yang Lee; Hao-Yang Lee 1Institute of Earth Sciences, Academia Sinica, Taipei 11529, Taiwan Search for other works by this author on: GSW Google Scholar Chun-Chieh Hsu Chun-Chieh Hsu 2Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan6Central Weather Bureau, Taipei 10048, Taiwan Search for other works by this author on: GSW Google Scholar Author and Article Information Xiaoran Zhang * 1Institute of Earth Sciences, Academia Sinica, Taipei 11529, Taiwan Sun-Lin Chung * 1Institute of Earth Sciences, Academia Sinica, Taipei 11529, Taiwan2Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan Yu-Ming Lai 3Department of Earth Sciences, National Taiwan Normal University, Taipei 11677, Taiwan Azman A. Ghani 4Department of Geology, University of Malaya, 50603 Kuala Lumpur, Malaysia Sayed Murtadha 5Department of Geology, Syiah Kuala University, Banda Aceh 23111, Indonesia Hao-Yang Lee 1Institute of Earth Sciences, Academia Sinica, Taipei 11529, Taiwan Chun-Chieh Hsu 2Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan6Central Weather Bureau, Taipei 10048, Taiwan *E-mails: zxr627@163.com; sunlin@ntu.edu.tw Publisher: Geological Society of America Received: 21 Feb 2019 Revision Received: 28 Mar 2019 Accepted: 03 Apr 2019 First Online: 17 Apr 2019 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2019 Geological Society of America Geology (2019) 47 (6): 573–576. https://doi.org/10.1130/G46172.1 Article history Received: 21 Feb 2019 Revision Received: 28 Mar 2019 Accepted: 03 Apr 2019 First Online: 17 Apr 2019 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Xiaoran Zhang, Sun-Lin Chung, Yu-Ming Lai, Azman A. Ghani, Sayed Murtadha, Hao-Yang Lee, Chun-Chieh Hsu; A 6000-km-long Neo-Tethyan arc system with coherent magmatic flare-ups and lulls in South Asia. Geology 2019;; 47 (6): 573–576. doi: https://doi.org/10.1130/G46172.1 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 Magmatic arcs typically exhibit non-steady-state evolution with episodic flare-ups and lulls, yet the main drivers remain contentious. Situated in the southwest margin of Southeast Asia, Sumatra records a long-lived magmatic arc that is still poorly constrained in age and tempo. Detrital zircon data from Sumatra delineate major arc magmatic pulses at ca. 212, 102–85, 52, and 22–11 Ma. The mid-Cretaceous to early Eocene zircons mostly yield high positive εHf(t) values, indicating magma derivation from juvenile sources and matching well with those of the Gangdese batholiths in the southern Lhasa terrane. These similarities substantiate an extended (∼6000 km) Neo-Tethyan arc system from southern Tibet to Sumatra that exhibits concurrent magmatic lulls (ca. 150–105 and 85–65 Ma) and flare-ups (ca. 105–85 and 65–40 Ma). The Late Cretaceous magmatic lull coincided with a period of strong regional deformation and increasingly fast northward drift of India, likely attributable to Neo-Tethyan flat slab subduction. Periodic pulses of Neo-Tethyan arc magmatism most likely correlated with repeated steepening and shallowing of slab dip, rather than India-Eurasia convergence rates. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.