Role of ridge jumps and ridge propagation in the tectonic evolution of the Lau back-arc basin, southwest Pacific

Abstract

Research Article| May 01, 1990 Role of ridge jumps and ridge propagation in the tectonic evolution of the Lau back-arc basin, southwest Pacific L. M. Parson; L. M. Parson 1Institute of Oceanographic Sciences, Deacon Laboratory, Wormley, Surrey GU8 SUB, England Search for other works by this author on: GSW Google Scholar J. A. Pearce; J. A. Pearce 2Department of Geology, University of Newcastle, Newcastle Upon Tyne, NE1 7RU, England Search for other works by this author on: GSW Google Scholar B. J. Murton; B. J. Murton 3Department of Earth Sciences, Open University, Milton Keynes, MK7 6AA, England Search for other works by this author on: GSW Google Scholar R. A. Hodkinson R. A. Hodkinson 4Royal School of Mines, Imperial College, London SW7 2BP, England Search for other works by this author on: GSW Google Scholar Author and Article Information L. M. Parson 1Institute of Oceanographic Sciences, Deacon Laboratory, Wormley, Surrey GU8 SUB, England J. A. Pearce 2Department of Geology, University of Newcastle, Newcastle Upon Tyne, NE1 7RU, England B. J. Murton 3Department of Earth Sciences, Open University, Milton Keynes, MK7 6AA, England R. A. Hodkinson 4Royal School of Mines, Imperial College, London SW7 2BP, England Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1990) 18 (5): 470–473. https://doi.org/10.1130/0091-7613(1990)018<0470:RORJAR>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 L. M. Parson, J. A. Pearce, B. J. Murton, R. A. Hodkinson; Role of ridge jumps and ridge propagation in the tectonic evolution of the Lau back-arc basin, southwest Pacific. Geology 1990;; 18 (5): 470–473. doi: https://doi.org/10.1130/0091-7613(1990)018<0470:RORJAR>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 GLORIA sidescan imagery of the central Lau Basin reveals a complex neotectonic framework in which the central Lau spreading center is actively propagating southward at the expense of the eastern Lau spreading center. The latter is located about 75 km closer to the active Tofua arc, and the transfer of spreading motion across this distance is achieved via a "relay" spreading-ridge segment. New magnetic and bathymetric interpretations suggest that the majority of the central and southern basin was formed by the eastern Lau spreading center between 5 Ma and the present day. The processes of arcward ridge migration, ridge propagation, and basinward arc migration may reflect the complex interplay of the subduction zone and regional tectonics in driving back-arc spreading, and may be a common feature of this tectonic environment. 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.