georefid:2007-088121georefid:2007-088081SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.2973/odp.proc.sr.149.247.1996<gco:CharacterString>Dynamic models of multiphase continental rifting and their implications for the Newfoundland and Iberia conjugate margins</gco:CharacterString>1996-01-01publicationgeorefid:2007-088121doi:10.2973/odp.proc.sr.149.247.1996Tett, David L.Rice University, Department of Geology and Geophysics, Houston, TX, United StatesauthorSawyer, Dale S.Rice University, United StatesauthorTexas A&M University, Ocean Drilling Program, College Station, TX, United StatespublisherdocumentDigitalIn: Whitmarsh, Robert B., Sawyer, Dale S., Klaus, Adam, Beslier, Marie-Odile, Collins, Eric S., Comas, Maria Carmen, Cornen, Guy, de Kaenel, Eric, Pinheiro, Luis de Menezes, Gervais, Elisabeth, Gibson, Ian L., Harry, Dennis L., Hobart, Michael A., Kanamatsu, Toshiya, Krawcyzk, Charlotte M., Liu, Li, Lofts, Jeremy C., Marsaglia, Kathleen M., Meyers, Philip A., Milkert, Doris, Milliken, Kitty L., Morgan, Julia K., Ramirez, Pedro, Seifert, Karl E., Shaw, Timothy J., Wilson, Chris, Yin, Chuan, Zhao, Xixi, Proceedings of the Ocean Drilling Program; scientific results, Iberia abyssal plain; covering Leg 149 of the cruises of the Drilling Vessel JOIDES Resolution; Balboa Harbor, Panama, to Lisbon, Portugal; sites 897-901, 10 March-25 May 1993149635-647Rifting between Newfoundland and Iberia occurred in two distinct phases-the first late Triassic to Early Jurassic, the second Late Jurassic to Early Cretaceous-culminating in the creation of the North Atlantic Ocean. A dynamic modeling method is used to examine the implications of multiple phases of rifting on the development of the Newfoundland-Iberia conjugate margins. A set of models based roughly on the Newfoundland and Iberian Margins suggests that, under most conditions in which two rift phases occur, the site of the original rift will not be favored for extension when stretching resumes, because the upper mantle cools and strengthens in the area of the original rift. The models predict a lack of magmatism on these margins and suggest that extension was significantly greater in the second rifting phase than in the first; these predictions agree with geological observations. The models do not predict the existence of highly thinned continental crust on both conjugate margins, however.completedSolid-earth geophysicsAtlantic OceanCanadacontinental marginCretaceouscrustal thinningEastern CanadaEuropeextensionextension tectonicsIberian abyssal plainIberian PeninsulaLeg 149MesozoicmodelsNewfoundlandNorth AtlanticNortheast AtlanticNorthwest AtlanticOcean Drilling Programplate tectonicsriftingSouthern Europesubsidencetectonicsurn:org.iodp:exp:149urnlargerWorkCitationcampaignEnglishgeoscientificInformation-15.3000-10.200039.000041.0000Iberian abyssal plainapplication/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://www-odp.tamu.edu/publications/149_SR/VOLUME/CHAPTERS/SR149_40.PDFdownload