georefid:2007-088096georefid: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.149.239.1996<gco:CharacterString>Organic matter in Pleistocene to Quaternary turbidites from sites 897, 898, 899, and 900, Iberia abyssal plain</gco:CharacterString>1996-01-01publicationgeorefid:2007-088096doi:10.2973/odp.proc.sr.149.239.1996Meyers, Philip A.University of Michigan, Department of Geological Sciences, Ann Arbor, MI, United StatesauthorSilliman, James E.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 1993149305-313Shipboard determinations of total organic carbon by difference between total carbon and carbonate carbon contents were compared to direct measurements of organic carbon in Carbonate-free sediments and found to be in generally good agreement. The direct measurement procedure tends to give slightly higher organic carbon concentrations and slightly lower organic C/N ratios. Organic C/N ratios and organic delta (super 13) C values indicate that the organic matter contained in Pleistocene to Pliocene turbidites encountered at Sites 897, 898, 899, and 900 is predominantly marine in origin. Depressed C/N ratios and results of Rock-Eval pyrolysis indicate that the marine organic matter in these sequences has been extensively degraded, presumably by microbial reworking. Organic matter at Site 897 has been less degraded than at the other three sites.completedIsotope geochemistryAtlantic Oceanbiogenic processesC-13/C-12carbonCenozoicchemical compositionchemical ratiosconcentrationEuropeIberian abyssal plainIberian Peninsulaisotope ratiosisotopesLeg 149North AtlanticNortheast AtlanticOcean Drilling ProgramODP Site 897ODP Site 898ODP Site 899ODP Site 900PleistoceneQuaternaryRock-EvalSouthern Europestable isotopesturbiditeurn:org.iodp:exp:149urnlargerWorkCitationcampaignurn:org.iodp:exp:149:site:897urnlargerWorkCitationstudyurn:org.iodp:exp:149urnlargerWorkCitationcampaignurn:org.iodp:exp:149:site:898urnlargerWorkCitationstudyurn:org.iodp:exp:149urnlargerWorkCitationcampaignurn:org.iodp:exp:149:site:899urnlargerWorkCitationstudyurn:org.iodp:exp:149urnlargerWorkCitationcampaignurn:org.iodp:exp:149:site:900urnlargerWorkCitationstudyurn:org.iodp:exp:149urnlargerWorkCitationcampaignEnglishgeoscientificInformation-12.2847-11.361640.405940.5019application/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://www-odp.tamu.edu/publications/149_SR/VOLUME/CHAPTERS/SR149_15.PDFdownload