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The rift-to-drift transition in the North Atlantic: A stuttering start of the MORB machine?

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dc.contributor.authorJagoutz, Oliver
dc.contributor.authorMuntener, Othmar
dc.contributor.authorManatschal, Gianreto
dc.contributor.authorRubatto, Daniela
dc.contributor.authorPeron-Pinvidic, Gwenn
dc.contributor.authorTurrin, Brent
dc.contributor.authorVilla, Igor
dc.date.accessioned2015-12-07T22:53:43Z
dc.date.issued2007
dc.date.updated2015-12-07T12:42:05Z
dc.description.abstractWe report U-Pb and 39Ar-40Ar measurements on plutonic rocks recovered from the Ocean Drilling Program (ODP) Legs 173 and 210. Drilling revealed continental crust (Sites 1067 and 1069) and exhumed mantle (Sites 1070 and 1068) along the Iberia margin and exhumed mantle (Site 1277) on the conjugate Newfoundland margin. Our data record a complex igneous and thermal history related to the transition from rifting to seafloor spreading. The results show that the rift-to-drift transition is marked by a stuttering start of MORB-type magmatic activity. Subsequent to initial alkaline magmatism, localized mid-oceanic ridge basalts (MORB) magmatism was again replaced by basin-wide alkaline events, caused by a low degree of decompression melting due to tectonic delocalization of deformation. Such "off-axis" magmatism might be a common process in (ultra-) slow oceanic spreading systems, where "magmatic" and "tectonic" spreading varies in both space and time.
dc.identifier.issn0091-7613
dc.identifier.urihttp://hdl.handle.net/1885/27852
dc.publisherGeological Society of America Inc
dc.sourceGeology
dc.subjectKeywords: Age determinations; Magma-poor margins; Ocean Driling Program (ODP); Ocean-continent transition; Basalt; Deformation; Igneous rocks; Tectonics; Volcanic rocks; Oceanography; magmatism; mid-ocean ridge basalt; Ocean Drilling Program; ocean-continent transi Age determinations; Magma-poor margins; MORB; Ocean-continent transition; Rifting
dc.titleThe rift-to-drift transition in the North Atlantic: A stuttering start of the MORB machine?
dc.typeJournal article
local.bibliographicCitation.issue12
local.bibliographicCitation.lastpage1090
local.bibliographicCitation.startpage1087
local.contributor.affiliationJagoutz, Oliver, Universitat Bern
local.contributor.affiliationMuntener, Othmar, Swiss Federal Institute of Technology (ETH)
local.contributor.affiliationManatschal, Gianreto, Universite Louis Pasteur
local.contributor.affiliationRubatto, Daniela, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationPeron-Pinvidic, Gwenn, Universite Louis Pasteur
local.contributor.affiliationTurrin, Brent, State University of New Jersey
local.contributor.affiliationVilla, Igor, Universitat Bern
local.contributor.authoruidRubatto, Daniela, u9909045
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor040203 - Isotope Geochemistry
local.identifier.ariespublicationu4047674xPUB54
local.identifier.citationvolume35
local.identifier.doi10.1130/G23613A.1
local.identifier.scopusID2-s2.0-37449011853
local.type.statusPublished Version

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