Southeastern Lewis Hills (Bay of Islands Ophiolite): Geology of a deeply eroded, inside-corner, ridge-transform intersection
2001; Geological Society of America; Volume: 113; Issue: 8 Linguagem: Inglês
10.1130/0016-7606(2001)113 2.0.co;2
ISSN1943-2674
Autores Tópico(s)Geochemistry and Geologic Mapping
ResumoResearch Article| August 01, 2001 Southeastern Lewis Hills (Bay of Islands Ophiolite): Geology of a deeply eroded, inside-corner, ridge-transform intersection Günter Suhr; Günter Suhr 1Institut für Mineralogie und Geochemie, Universität zu Köln, Zülpicher Strasse 49b, 50674 Köln, Germany, and Max-Planck- Institut für Chemie, Postfach 3060, 55020 Mainz, Germany Search for other works by this author on: GSW Google Scholar Peter A. Cawood Peter A. Cawood 2Tectonics Special Research Centre, School of Applied Geology, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia Search for other works by this author on: GSW Google Scholar Author and Article Information Günter Suhr 1Institut für Mineralogie und Geochemie, Universität zu Köln, Zülpicher Strasse 49b, 50674 Köln, Germany, and Max-Planck- Institut für Chemie, Postfach 3060, 55020 Mainz, Germany Peter A. Cawood 2Tectonics Special Research Centre, School of Applied Geology, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia Publisher: Geological Society of America Received: 29 Jul 1999 Revision Received: 25 Apr 2000 Accepted: 26 Sep 2000 First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (2001) 113 (8): 1025–1038. https://doi.org/10.1130/0016-7606(2001)113 2.0.CO;2 Article history Received: 29 Jul 1999 Revision Received: 25 Apr 2000 Accepted: 26 Sep 2000 First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Günter Suhr, Peter A. Cawood; Southeastern Lewis Hills (Bay of Islands Ophiolite): Geology of a deeply eroded, inside-corner, ridge-transform intersection. GSA Bulletin 2001;; 113 (8): 1025–1038. doi: https://doi.org/10.1130/0016-7606(2001)113 2.0.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 SocietyGSA Bulletin Search Advanced Search Abstract The Lewis Hills massif (Bay of Islands Ophiolite, Newfoundland) preserves a deeply eroded transform fault. A major, low-angle, extensional mylonite zone is next to the transform assemblage and probably merges laterally into it. The mylonite developed in a high-temperature environment and occurs at the top of relatively rigid lithospheric mantle. The lithospheric mantle represents exhumed, older, arc-type basement of the Little Port Complex that is also exposed across the transform in the western Lewis Hills. It differs dramatically from an asthenospheric mantle unit of the Bay of Islands Complex, exposed in the eastern Lewis Hills, that formed in a spreading ridge environment.The fossil ridge-transform segment and associated low-angle normal fault in the Lewis Hills formed at an inside-corner structural setting similar to recently discovered core complexes at oceanic ridge-transform intersections. However, the Lewis Hills segment developed in a setting where a spreading center propagated across a transform margin and rifted older arc-type lithosphere. Factors that contributed to formation of the low-angle detachment fault are the lithospheric nature of the mantle basement, rheological weakening and strain focusing by intrusive sills, and weak lateral coupling realized by the extensional transform assemblage. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Referência(s)