Three-dimensional seismic imaging of Paleogene dike-fed submarine volcanoes from the northeast Atlantic margin

Abstract

Research Article| March 01, 2002 Three-dimensional seismic imaging of Paleogene dike-fed submarine volcanoes from the northeast Atlantic margin Richard Davies; Richard Davies 1ExxonMobil Exploration Company, 233 Benmar, Houston, Texas 77060, USA Search for other works by this author on: GSW Google Scholar Brian R. Bell; Brian R. Bell 2Division of Earth Sciences, University of Glasgow, Lilybank Gardens, Glasgow G12 8QQ, UK Search for other works by this author on: GSW Google Scholar Joseph A. Cartwright; Joseph A. Cartwright 3Department of Earth Sciences, Cardiff University, P.O. Box 914, Cardiff CF10 3YE, UK Search for other works by this author on: GSW Google Scholar Simon Shoulders Simon Shoulders 3Department of Earth Sciences, Cardiff University, P.O. Box 914, Cardiff CF10 3YE, UK Search for other works by this author on: GSW Google Scholar Author and Article Information Richard Davies 1ExxonMobil Exploration Company, 233 Benmar, Houston, Texas 77060, USA Brian R. Bell 2Division of Earth Sciences, University of Glasgow, Lilybank Gardens, Glasgow G12 8QQ, UK Joseph A. Cartwright 3Department of Earth Sciences, Cardiff University, P.O. Box 914, Cardiff CF10 3YE, UK Simon Shoulders 3Department of Earth Sciences, Cardiff University, P.O. Box 914, Cardiff CF10 3YE, UK Publisher: Geological Society of America Received: 18 Jul 2001 Revision Received: 01 Nov 2001 Accepted: 28 Nov 2001 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2002) 30 (3): 223–226. https://doi.org/10.1130/0091-7613(2002)030<0223:TDSIOP>2.0.CO;2 Article history Received: 18 Jul 2001 Revision Received: 01 Nov 2001 Accepted: 28 Nov 2001 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Richard Davies, Brian R. Bell, Joseph A. Cartwright, Simon Shoulders; Three-dimensional seismic imaging of Paleogene dike-fed submarine volcanoes from the northeast Atlantic margin. Geology 2002;; 30 (3): 223–226. doi: https://doi.org/10.1130/0091-7613(2002)030<0223:TDSIOP>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 We use three-dimensional seismic data to describe the architecture of shallow intrusive igneous sill and dike complexes intruded into the upper crust as well as the internal and external geometry of extrusive conical igneous mounds that were fed by the magma conduits. The conical mounds accreted on the seabed, directly above the tips of the basaltic dikes, between 54.9 and 54.6 Ma. In plan view the mounds are broadly circular, 1–1.7 km in diameter, and have a relief of 50–300 m. They occur above a complex network of linked cuspate-shaped sills and dikes intruded into Paleocene and Cretaceous sediments of the Faeroe-Shetland Basin, northeast Atlantic margin. The highly organized internal structure, consisting of bulbous layers arranged concentrically around a central axis, along with the clear vertical link to the underlying sills and dikes, indicates that they most likely represent pillowed basaltic lava and hyaloclastite mounds that were fed by the dikes and extruded onto the seafloor. Mounds of similar external geometry have been described from sidescan sonar images above active spreading centers in oceanic settings. However, such structures are rarely recognized in passive margin settings, and prior to this investigation our knowledge of their three-dimensional internal geometry has been largely speculative. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.