Crustal trace of a hot convective sheet

Research Article| March 01, 2003 Crustal trace of a hot convective sheet Suleiman Al-Kindi; Suleiman Al-Kindi 1Bullard Laboratories, Madingley Rise, Madingley Road, Cambridge CB3 0EZ, UK Search for other works by this author on: GSW Google Scholar Nicky White; Nicky White 1Bullard Laboratories, Madingley Rise, Madingley Road, Cambridge CB3 0EZ, UK Search for other works by this author on: GSW Google Scholar Martin Sinha; Martin Sinha 2Southampton Oceanography Centre, University of Southampton, Waterfront Campus, European Way, Southampton SO14 3ZH, UK Search for other works by this author on: GSW Google Scholar Richard England; Richard England 3Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, UK Search for other works by this author on: GSW Google Scholar Richard Tiley Richard Tiley 4Bullard Laboratories, Madingley Rise, Madingley Road, Cambridge CB3 0EZ, UK Search for other works by this author on: GSW Google Scholar Geology (2003) 31 (3): 207–210. https://doi.org/10.1130/0091-7613(2003)031<0207:CTOAHC>2.0.CO;2 Article history received: 11 Jul 2002 rev-recd: 23 Oct 2002 accepted: 02 Nov 2002 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 Suleiman Al-Kindi, Nicky White, Martin Sinha, Richard England, Richard Tiley; Crustal trace of a hot convective sheet. Geology 2003;; 31 (3): 207–210. doi: https://doi.org/10.1130/0091-7613(2003)031<0207:CTOAHC>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 Iceland plume has played an influential role in the evolution of the North Atlantic Ocean and margins over the past 60 m.y. It is believed that this plume formed at the conjunction of a tetrad of hot, subvertical, convective sheets. The impingement of these hot sheets at the base of the lithospheric lid caused decompressional melting, generating substantial quantities of high-temperature magma that were injected into the cold overlying lid. Over the next 10 m.y., these sheets partly coalesced to form a crudely axisymmetric plume head. Here we analyze the lithospheric fingerprint of one of these hot convective sheets. By forward and inverse modeling of densely sampled wide-angle seismic data, in conjunction with gravity observations, we determined the three-dimensional shape of magmatic underplating trapped within the lithosphere. The injection of this melt into the lithosphere generated substantial permanent and minor transient uplift of Earth's surface. Predicted and measured amounts of consequent denudation and sedimentation agree within error. Temporal variations in the patterns of deposition and oceanic circulation adjacent to the convective sheet show its evolution through time and space. Our results suggest that this linear sheet has probably been directly and indirectly responsible for cyclical events over ∼60 m.y. These events have 0.5–1 and 4–6 m.y. periodicities, the existence of which may help to elucidate the dynamic behavior of convective sheets during and after impingement. Thus, in particular circumstances, surficial geological processes yield an indirect record of mantle convection and melt-generation processes. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.