georefid:2005-004706georefid:2005-004705SEDIS 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=10.2973/odp.proc.ir.210.101.20042004-01-01publicationgeorefid:2005-004706doi:10.2973/odp.proc.ir.210.101.2004Tucholke, Brian E.Woods Hole Oceanographic Institution, Department of Geology and Geophysics, Woods Hole, MA, United StatesauthorSibuet, Jean-ClaudeIFREMER, FranceauthorKlaus, AdamOcean Drilling Program, United StatesauthorArnaboldi, MichelaUniversity of Michigan, United StatesauthorDelius, HeikeUniversity of Leicester, United KingdomauthorEngstrom, Anna V.Stockholm University, SwedenauthorGalbrun, BrunoUniversite Pierre et Marie Curie, FranceauthorGardin, SilviaMemorial University of Newfoundland, CanadaauthorHiscott, Richard N.Lamont-Doherty Earth Observatory, United StatesauthorKarner, Garry D.Florida State University, United StatesauthorLadner, Bryan C.University of Massachusetts at Amherst, United StatesauthorLeckie, R. MarkNational Taiwan Ocean University, TaiwanauthorLee, Chao-ShingEcole et Observatoire des Sciences de la Terre, FranceauthorManatschal, GianretoCalifornia State University, United StatesauthorMarsaglia, Kathleen M.Bundesanstalt fuer Geowissenschaften und Rohstoffe, Federal Republic of GermanyauthorPletsch, Thomas K.Universitaet Tuebingen, Federal Republic of GermanyauthorPross, JoergUniversity of Edinburgh, United KingdomauthorRobertson, Alastair H. F.Rice University, United StatesauthorSawyer, Dale S.Pennsylvania State University, United StatesauthorSawyer, Derek E.Southampton Oceanography Centre, United KingdomauthorShillington, Donna J.University of Tokyo, JapanauthorShirai, MasaakiNational University of Ireland, IrelandauthorShryane, ThereseShimane University, JapanauthorStant, Sharon AudraRosenstiel School of Marine and Atmospheric Science, United StatesauthorTakata, HiroyukiOpen University, United KingdomauthorUrquhart, ElspethUniversity of California at Santa Cruz, United StatesauthorWilson, ChrisIFREMER, FranceauthorZhao, XixiOcean Drilling Program, United StatesauthorTexas A&M University, Ocean Drilling Program, College Station, TX, United StatespublisherdocumentDigitalIn: Tucholke, Brian E., Sibuet, Jean-Claude, Klaus, Adam, Arnaboldi, Michela, Delius, Heike, Engstrom, Anna V., Galbrun, Bruno, Hiscott, Richard N., Karner, Garry D., Ladner, Bryan C., Leckie, R. Mark, Lee, Chao-Shing, Manatschal, Gianreto, Marsaglia, Kathleen M., Pletsch, Thomas K., Pross, Joerg, Robertson, Alastair H. F., Sawyer, Dale S., Sawyer, Derek E., Shillington, Donna J., Shirai, Masaaki, Shryane, Therese, Stant, Sharon Audra, Takata, Hiroyuki, Urquhart, Elspeth, Wilson, Chris, Zhao, Xixi, Nevill, Heather (editor), Proceedings of the Ocean Drilling Program; initial reports; drilling the Newfoundland half of the Newfoundland-Iberia Transect; the first conjugate margin drilling in a nonvolcanic rift; covering Leg 210 of the cruises of the drilling vessel JOIDES Resolution; Sites 1276 and 1277, 6 July-6 September 2003210Ocean Drilling Program Leg 210 was devoted to studying the history of rifting and postrift sedimentation in the Newfoundland-Iberia rift. Drilling was conducted in the Newfoundland Basin along a transect conjugate to previous drilling on the Iberia margin (Legs 149 and 173). This was the first time that deep-sea drilling has been conducted on both sides of a nonvolcanic rift in order to understand the structural and sedimentary evolution of the complete rift system. The prime site during Leg 210 (Site 1276) was drilled in transitional crust between known continental crust and oceanic crust identified by magnetic Anomalies M3 to M0 (Barremian-Aptian). On the conjugate Iberia margin, extensive geophysical work and deep-sea drilling have shown that the transitional crust is exhumed mantle that is extensively serpentinized in its upper part. Transitional crust on the Newfoundland side, however, is typically a kilometer or more shallower and has much smoother topography, and seismic refraction data suggest that the crust may be thin ( approximately 4 km) oceanic crust. These features indicate that the rift may have developed asymmetrically. A major goal at Site 1276 was to investigate these differences by sampling basement and the facies responsible for a strong overlying basinwide reflection (U) that is poorly developed on the conjugate Iberia margin, together with the intervening lithologic section. Site 1276 was cored from 800 to 1739 m below seafloor with excellent recovery (average = 85%). Before drilling was terminated because of unstable conditions in the uncased lower part of the hole, we cored sills >10 m thick that are estimated to be 100-200 m above basement. The sills are diabases of probable alkaline composition. They have sedimentary contacts that show extensive hydrothermal alteration. Associated sedimentary and structural features suggest that the sills were intruded at shallow levels below the seafloor. The top of the upper sill is approximately coincident with the U reflection, within uppermost Aptian(?) to lower Albian fine- to coarse-grained sedimentary gravity flows. The nature of basement at this site remains uncertain, but the presence of the deep sills indicates that there was a significant postrift magmatic event that may have affected much of the basin.completedStratigraphyIgneous and metamorphic petrologyAtlantic OceanbiostratigraphyCanadaCenozoiccontinental margincoresCretaceousEastern Canadageochemistrygeophysical methodsgeophysical profilesgeophysical surveysigneous rocksLeg 210lithostratigraphyMesozoicmetamorphic rocksNewfoundlandNewfoundland and LabradorNewfoundland BasinNewfoundland-Iberia TransectNorth AtlanticOcean Drilling Programocean floorsODP Site 1276ODP Site 1277Oligocenepaleo-oceanographyPaleogenepaleomagnetismrift zonesseismic methodsseismic profilessurveysTertiaryurn:org.iodp:exp:210urnlargerWorkCitationcampaignurn:org.iodp:exp:210:site:1276urnlargerWorkCitationstudyurn:org.iodp:exp:210urnlargerWorkCitationcampaignurn:org.iodp:exp:210:site:1277urnlargerWorkCitationstudyurn:org.iodp:exp:210urnlargerWorkCitationcampaignEnglishgeoscientificInformation-45.0000-44.200045.100045.3000Also available on CD-ROM in PDF format and on the Web in PDF or HTMLapplication/pdfunknownSEDIS Publication Catalogue

ana.macario@awi.de

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