Long-lived postbreakup magmatism along the East Greenland margin: Evidence for shallow-mantle metasomatism by the Iceland plume

Abstract

Research Article| February 01, 2004 Long-lived postbreakup magmatism along the East Greenland margin: Evidence for shallow-mantle metasomatism by the Iceland plume M. Storey; M. Storey 1Danish Lithosphere Center, Øster Voldgade 10, DK-1350 Copenhagen, Denmark Search for other works by this author on: GSW Google Scholar A.K. Pedersen; A.K. Pedersen 2Geological Museum, Øster Voldgade 5–7, DK-1350 Copenhagen, Denmark Search for other works by this author on: GSW Google Scholar O. Stecher; O. Stecher 3 Danish Lithosphere Center, Øster Voldgade 10, DK-1350 Copenhagen, Denmark Search for other works by this author on: GSW Google Scholar S. Bernstein; S. Bernstein 3 Danish Lithosphere Center, Øster Voldgade 10, DK-1350 Copenhagen, Denmark Search for other works by this author on: GSW Google Scholar H.C. Larsen; H.C. Larsen 3 Danish Lithosphere Center, Øster Voldgade 10, DK-1350 Copenhagen, Denmark Search for other works by this author on: GSW Google Scholar L.M. Larsen; L.M. Larsen 4Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK-1350 Copenhagen, Denmark Search for other works by this author on: GSW Google Scholar J.A. Baker; J.A. Baker 5Danish Lithosphere Center, Øster Voldgade 10, DK-1350 Copenhagen, Denmark Search for other works by this author on: GSW Google Scholar R.A. Duncan R.A. Duncan 6College of Oceanography, Oregon State University, Corvallis, Oregon 97331, USA Search for other works by this author on: GSW Google Scholar Author and Article Information M. Storey 1Danish Lithosphere Center, Øster Voldgade 10, DK-1350 Copenhagen, Denmark A.K. Pedersen 2Geological Museum, Øster Voldgade 5–7, DK-1350 Copenhagen, Denmark O. Stecher 3 Danish Lithosphere Center, Øster Voldgade 10, DK-1350 Copenhagen, Denmark S. Bernstein 3 Danish Lithosphere Center, Øster Voldgade 10, DK-1350 Copenhagen, Denmark H.C. Larsen 3 Danish Lithosphere Center, Øster Voldgade 10, DK-1350 Copenhagen, Denmark L.M. Larsen 4Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK-1350 Copenhagen, Denmark J.A. Baker 5Danish Lithosphere Center, Øster Voldgade 10, DK-1350 Copenhagen, Denmark R.A. Duncan 6College of Oceanography, Oregon State University, Corvallis, Oregon 97331, USA Publisher: Geological Society of America Received: 03 Jul 2003 Revision Received: 06 Oct 2003 Accepted: 07 Oct 2003 First Online: 03 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2004) 32 (2): 173–176. https://doi.org/10.1130/G19889.1 Article history Received: 03 Jul 2003 Revision Received: 06 Oct 2003 Accepted: 07 Oct 2003 First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation M. Storey, A.K. Pedersen, O. Stecher, S. Bernstein, H.C. Larsen, L.M. Larsen, J.A. Baker, R.A. Duncan; Long-lived postbreakup magmatism along the East Greenland margin: Evidence for shallow-mantle metasomatism by the Iceland plume. Geology 2004;; 32 (2): 173–176. doi: https://doi.org/10.1130/G19889.1 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 40Ar/39Ar dating has identified a succession of middle Miocene (14–13 Ma) basaltic lavas in East Greenland that overlie Eocene flood basalts that were erupted during continental breakup ca. 56–55 Ma. The long postbreakup magmatic history (∼40 m.y.) of the East Greenland margin precludes a simple relationship between this later igneous activity and the track of the Iceland hotspot. Chemical and isotopic data suggest that the postbreakup magmas were produced from mantle that had been metasomatized by light rare earth element–enriched, H2O- and CO2-bearing melts originating from the Iceland plume. Episodic melting of recently metasomatized shallow mantle beneath Greenland and the North Atlantic can explain both the composition and the long-lived nature of postbreakup magmatism along the East Greenland margin, as well as lavas on Jan Mayen Island that have enriched, Icelandic-type isotopic signatures. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.