georefid:2008-039750SEDIS Publication Catalogue

ana.macario@awi.de

http://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.1144/SP282.142007-01-01publicationgeorefid:2008-039750doi:10.1144/SP282.14Manatschal, G.CGS-EOST, Strasbourg, FranceauthorMuentener, O.Universite Louis Pasteur, FranceauthorLavier, L. L.Universidade de Aveiro, PortugalauthorMinshull, T. A.University of Bern, SwitzerlandauthorPeron-Pinvidic, G.University of Texas Institute for Geophysics, United StatesauthorGeological Society of London, London, United KingdompublisherdocumentHardcopyIn: Karner, G. D. (editor), Manatschal, G. (editor), Pinheiro, L. M. (editor), Imaging, mapping and modelling continental lithosphere extension and breakup282291-324Although the Iberia-Newfoundland and Alpine Tethys margins are of different age and ultimately had a different fate, they share remarkable similarities. Both pairs of margins show a change from initially distributed and decoupled extension to later localized, coupled and asymmetric extension that results in thinning of the crust and exhumation of subcontinental mantle. The change in the mode of extension together with the localization of deformation reflects an evolution of the bulk rheology of the extending lithosphere. In this paper we summarize the pertinent geological observations for the Iberia-Newfoundland and Alpine Tethys margins. We describe the stratigraphic evolution, the fault geometry, basin architecture, and magmatic and metamorphic evolution of the two pairs of margins from initial rifting to final continental breakup. This description forms a basis for understanding the evolution of the bulk rheology and how the various processes interact during progressive lithospheric extension. For the Iberia-Newfoundland and Alpine Tethys margins initial rifting appears to be controlled by inherited heterogeneities and mechanical localization processes, whereas final rifting and lithospheric rupture is controlled by serpentinization, magmatic and thermal weakening. At other margins, these modes may interact in a different way depending on the prerift conditions and the evolution of the rheology during rifting.completedOceanographySolid-earth geophysicsAlpine TethysAlpsAtlantic OceanCanadacontinental margincrustal thinningEastern CanadaEuropeextensionextension tectonicsgeophysical methodsgeophysical profilesgeophysical surveysheterogeneityIberian abyssal plainIberian PeninsulaLeg 173lithospheremetasomatismNewfoundlandNewfoundland and LabradorNorth AtlanticNortheast AtlanticOcean Drilling ProgramODP Site 1067ODP Site 1068ODP Site 1069plate tectonicsreconstructionrheologyriftingsea-floor spreadingseismic methodsseismic profilesserpentinizationSouthern EuropesurveystectonicsTethysurn:org.iodp:exp:173urnlargerWorkCitationcampaignurn:org.iodp:exp:173:site:1067urnlargerWorkCitationstudyurn:org.iodp:exp:173urnlargerWorkCitationcampaignurn:org.iodp:exp:173:site:1068urnlargerWorkCitationstudyurn:org.iodp:exp:173urnlargerWorkCitationcampaignurn:org.iodp:exp:173:site:1069urnlargerWorkCitationstudyurn:org.iodp:exp:173urnlargerWorkCitationcampaignEnglishgeoscientificInformation-50.0000-38.000042.000046.0000