Detachment faulting, mantle serpentinization, and serpentinite- mud volcanism beneath the Porcupine Basin, southwest of Ireland

Research Article| July 01, 2001 Detachment faulting, mantle serpentinization, and serpentinite- mud volcanism beneath the Porcupine Basin, southwest of Ireland T.J. Reston; T.J. Reston 1Department of Geology, University of Aberdeen, Aberdeen AB24 3UE, UK Search for other works by this author on: GSW Google Scholar J. Pennell; J. Pennell 2Conoco (UK) Ltd., Rubislaw House, Anderson Drive, Aberdeen AB15 6FZ, UK Search for other works by this author on: GSW Google Scholar A. Stubenrauch; A. Stubenrauch 2Conoco (UK) Ltd., Rubislaw House, Anderson Drive, Aberdeen AB15 6FZ, UK Search for other works by this author on: GSW Google Scholar I. Walker; I. Walker 2Conoco (UK) Ltd., Rubislaw House, Anderson Drive, Aberdeen AB15 6FZ, UK Search for other works by this author on: GSW Google Scholar M. Perez-Gussinye M. Perez-Gussinye 3GEOMAR Research Center, Wischhofstrasse 1-3, 24148 Kiel, Germany Search for other works by this author on: GSW Google Scholar Author and Article Information T.J. Reston 1Department of Geology, University of Aberdeen, Aberdeen AB24 3UE, UK J. Pennell 2Conoco (UK) Ltd., Rubislaw House, Anderson Drive, Aberdeen AB15 6FZ, UK A. Stubenrauch 2Conoco (UK) Ltd., Rubislaw House, Anderson Drive, Aberdeen AB15 6FZ, UK I. Walker 2Conoco (UK) Ltd., Rubislaw House, Anderson Drive, Aberdeen AB15 6FZ, UK M. Perez-Gussinye 3GEOMAR Research Center, Wischhofstrasse 1-3, 24148 Kiel, Germany Publisher: Geological Society of America Received: 24 Oct 2000 Revision Received: 01 Mar 2001 Accepted: 13 Mar 2001 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2001) 29 (7): 587–590. https://doi.org/10.1130/0091-7613(2001)029<0587:DFMSAS>2.0.CO;2 Article history Received: 24 Oct 2000 Revision Received: 01 Mar 2001 Accepted: 13 Mar 2001 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation T.J. Reston, J. Pennell, A. Stubenrauch, I. Walker, M. Perez-Gussinye; Detachment faulting, mantle serpentinization, and serpentinite- mud volcanism beneath the Porcupine Basin, southwest of Ireland. Geology 2001;; 29 (7): 587–590. doi: https://doi.org/10.1130/0091-7613(2001)029<0587:DFMSAS>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 SocietyGeology Search Advanced Search Abstract The Porcupine Basin southwest of Ireland provides an opportunity to study the symmetry of rifting at stretching factors approaching continental breakup. Profiles across the basin image a bright reflection that appears to represent a detachment fault, and may in part be a décollement at the top of partially serpentinized mantle. Although overall the basin appears symmetric, the consistent westward structural dip of the detachment implies that, at high stretching factors, extension was asymmetric. Farther south, the Porcupine median high appears in cross section to be a triangular construction overlying tilted fault blocks and onlapped by postrift sediment. Despite no evidence for synrift magmatism, this high has previously been interpreted as a basaltic structure. However, it may represent a serpentinite-mud volcano or diapir: we suggest that such structures produce the serpentinite breccias found within the rifted continent-ocean transition of nonvolcanic margins. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.