Dating the onset of motion on the Sagaing fault: Evidence from detrital zircon and titanite U-Pb geochronology from the North Minwun Basin, Myanmar

Abstract

Research Article| April 17, 2019 Dating the onset of motion on the Sagaing fault: Evidence from detrital zircon and titanite U-Pb geochronology from the North Minwun Basin, Myanmar C.K. Morley; C.K. Morley 1Department of Geological Sciences, Chiang Mai University, Chiang Mai 50200, Thailand Search for other works by this author on: GSW Google Scholar F. Arboit F. Arboit 2Department of Geology, Trinity College, Dublin 2, Ireland Search for other works by this author on: GSW Google Scholar Author and Article Information C.K. Morley 1Department of Geological Sciences, Chiang Mai University, Chiang Mai 50200, Thailand F. Arboit 2Department of Geology, Trinity College, Dublin 2, Ireland Publisher: Geological Society of America Received: 07 Jan 2019 Revision Received: 31 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): 581–585. https://doi.org/10.1130/G46321.1 Article history Received: 07 Jan 2019 Revision Received: 31 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 C.K. Morley, F. Arboit; Dating the onset of motion on the Sagaing fault: Evidence from detrital zircon and titanite U-Pb geochronology from the North Minwun Basin, Myanmar. Geology 2019;; 47 (6): 581–585. doi: https://doi.org/10.1130/G46321.1 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 The onset of dextral motion along SE Asia's largest active strike-slip fault, the Sagaing fault in Myanmar, has been the subject of considerable controversy, with estimates ranging from the Miocene-Pliocene boundary to possibly the late Eocene, along with displacement magnitude estimates ranging between 100 km and 400+ km. A recently identified synkinematic basin formed at a releasing bend in one of the fault strands in northern Myanmar was dated in this study using the maximum depositional ages from detrital zircons and titanites, giving an Oligocene age (28–27 Ma). This dates the onset of motion on the fault zone and favors the high-displacement models (>400 km). The higher displacement and older history of the Sagaing fault impact how the western Burma terrane interacted with the basins in the eastern Andaman Sea and indicate that high strike-slip displacements and shortening occurred during the late-stage development of the Indo-Burma Ranges. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.