Deep structure in the vicinity of the ocean-continent transition zone under the southern Iberia Abyssal Plain

Research Article| August 01, 1998 Deep structure in the vicinity of the ocean-continent transition zone under the southern Iberia Abyssal Plain T. A. Minshull; T. A. Minshull 2Bullard Laboratories, Department of Earth Sciences, University of Cambridge, Madingley Road, Cambridge CB3 0EZ, United Kingdom6Author for correspondence: Whitmarsh and Minshull. Search for other works by this author on: GSW Google Scholar Discovery 215 Working Group; Discovery 215 Working Group Search for other works by this author on: GSW Google Scholar S. M. Dean; S. M. Dean 2Bullard Laboratories, Department of Earth Sciences, University of Cambridge, Madingley Road, Cambridge CB3 0EZ, United Kingdom Search for other works by this author on: GSW Google Scholar Discovery 215 Working Group; Discovery 215 Working Group Search for other works by this author on: GSW Google Scholar R. B. Whitmarsh; R. B. Whitmarsh 3Challenger Division, Southampton Oceanography Centre, Southampton SO14 3ZH, United Kingdom6Author for correspondence: Whitmarsh and Minshull. Search for other works by this author on: GSW Google Scholar Discovery 215 Working Group; Discovery 215 Working Group Search for other works by this author on: GSW Google Scholar S. M. Russell; S. M. Russell 3Challenger Division, Southampton Oceanography Centre, Southampton SO14 3ZH, United Kingdom4Department of Geological Sciences, University of Durham, Durham DH1 3LE Search for other works by this author on: GSW Google Scholar Discovery 215 Working Group; Discovery 215 Working Group Search for other works by this author on: GSW Google Scholar K. E. Louden; K. E. Louden 5Department of Oceanography, Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada. Search for other works by this author on: GSW Google Scholar Discovery 215 Working Group; Discovery 215 Working Group Search for other works by this author on: GSW Google Scholar D. Chian; D. Chian 5Department of Oceanography, Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada. Search for other works by this author on: GSW Google Scholar Discovery 215 Working Group Discovery 215 Working Group Search for other works by this author on: GSW Google Scholar Geology (1998) 26 (8): 743–746. https://doi.org/10.1130/0091-7613(1998)026<0743:DSITVO>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation T. A. Minshull, S. M. Dean, R. B. Whitmarsh, S. M. Russell, K. E. Louden, D. Chian; Discovery 215 Working Group, Deep structure in the vicinity of the ocean-continent transition zone under the southern Iberia Abyssal Plain. Geology 1998;; 26 (8): 743–746. doi: https://doi.org/10.1130/0091-7613(1998)026<0743:DSITVO>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentBy SocietyGeology Search Advanced Search Abstract We present results from a seismic and magnetic study of acoustic basement beneath the southern Iberia Abyssal Plain. An ocean-continent transition zone (OCT), characterized by subdued basement relief and weak magnetization, lies seaward of thinned continental crust. Its western edge is a region with isochron-parallel ridges and generally higher basement magnetizations. The width of the OCT decreases to the north. The seaward change in basement morphology coincides with changes in seismic velocity structure, but in both regions, anomalously high velocities at shallow depths within acoustic basement suggest that the OCT consists largely of serpentinized peridotite. Our magnetic and seismic data support the hypothesis of exhumed upper mantle, more than that of ultraslow sea-floor spreading, for the origin of the OCT. 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.