georefid:2004-051324georefid:2004-051314SEDIS 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.ir.207.110.2004<gco:CharacterString>Molecular biogeochemistry of Cretaceous black shales from the Demerara Rise; preliminary shipboard results from Sites 1257 and 1258, ODP Leg 207</gco:CharacterString>2004-01-01publicationgeorefid:2004-051324doi:10.2973/odp.proc.ir.207.110.2004Forster, AstridNederlands Instituut voor Onderzoek der Zee (NIOZ), Texel, NetherlandsauthorSturt, HelenGeological Survey of Canada, CanadaauthorMeyers, Philip A.Ocean Drilling Program, United StatesauthorErbacher, JochenWoods Hole Oceanographic Institution, United StatesauthorMosher, David C.Australian National University, AustraliaauthorMalone, Mitchell J.Carl von Ossietzky Universitaet Oldenburg, Federal Republic of GermanyauthorBerti, DeboraUniversite Pierre et Marie Curie, FranceauthorBice, Karen L.Nederlands Instituut voor Onderzoek der Zee (NIOZ), NetherlandsauthorBostock, HelenUniversity of Bremen, Federal Republic of GermanyauthorBrumsack, Hans-JuergenStockholm Universitet, SwedenauthorDanelian, TanielFlorida State University, United StatesauthorGlatz, ChristinePennsylvania State University, United StatesauthorHeidersdorf, FelixUniversity of Missouri, United StatesauthorHenderiks, JorijntjeUniversity of Michigan, United StatesauthorJanecek, Thomas R.Ruhr Universitaet Bochum, Federal Republic of GermanyauthorJunium, ChristopherKyushu University, JapanauthorLe Callonnec, LaurenceScripps Institution of Oceanography, United StatesauthorMacLeod, KenPurdue University, United StatesauthorMutterlose, H. JoergUniversity of Rhode Island, United StatesauthorNishi, HiroshiUniversity of Leicester, United KingdomauthorNorris, Richard D.Southampton Oceanography Centre, United KingdomauthorOgg, James G.University of Tokyo, JapanauthorO'Regan, A. MatthewUniversity of College London, United KingdomauthorRea, BriceWoods Hole Oceanographic Institution, United StatesauthorSexton, PhilipUniversity of Michigan, United StatesauthorSuganuma, YusukeBundesanstalt fuer Geowissenschaften und Rohstoffe, Federal Republic of GermanyauthorThurow, Juergen W.Geological Survey of Canada, CanadaauthorWilson, Paul A.Ocean Drilling Program, United StatesauthorWise, Sherwood W., Jr.Australian National University, AustraliaauthorTexas A&M University, Ocean Drilling Program, College Station, TX, United StatespublisherdocumentDigitalIn: Erbacher, Jochen, Mosher, David C., Malone, Mitchell J., Berti, Debora, Bice, Karen L., Bostock, Helen, Brumsack, Hans-Juergen, Danelian, Taniel, Forster, Astrid, Glatz, Christine, Heidersdorf, Felix, Henderiks, Jorijntje, Janecek, Thomas R., Junium, Christopher, Le Callonnec, Laurence, MacLeod, Ken, Meyers, Philip A., Mutterlose, H. Joerg, Nishi, Hiroshi, Norris, Richard D., Ogg, James G., O'Regan, Matthew A., Rea, Brice, Sexton, Philip, Sturt, Helen, Suganuma, Yusuke, Thurow, Juergen W., Wilson, Paul A., Wise, Sherwood W., Jr., Chapman, Mary (editor), Peters, Lorri L. (editor), Proceedings of the Ocean Drilling Program; Demerara Rise; equatorial Cretaceous and Paleogene paleoceanographic transect, western Atlantic; covering Leg 207 of the cruises of the drilling vessel JOIDES Resolution; Bridgetown, Barbados, to Rio de Janeiro, Brazil; Sites 1257-1261; 11 January-6 March 2003207Shipboard analysis was carried out on the free biomarker fraction of total lipid extracts of 10 Cretaceous black shale samples from Sites 1257 and 1258. The principal aim of the investigation was to study the primary biological sources and the thermal maturity of the organic matter in the core samples as well as the conditions of its preservation. The samples have total organic carbon contents of 4.5-28 wt%. Molecular analysis of biomarkers focused on n-alkane, sterane, and pentacyclic triterpane biomarkers. The organic matter in the black shales is thermally immature and dominantly derived from algal and microbial sources with varying contributions of higher plant material. Sulfur incorporation into organic matter is evident from the abundance of hopanoid thiophenes and isorenieratane thianes. High yields of lycopane relative to n-C35 indicate that the preservation of organic matter is excellent, which is consistent with deposition under oxygen-depleted conditions in the background of low sedimentation rates.completedGeochemistry of rocks, soils, and sedimentsSedimentary petrologyaliphatic hydrocarbonsalkanesAtlantic Oceanbiochemistrybiomarkersblack shalecarbonclastic rockscoresCretaceousDemerara Risegas chromatogramsgenesisgeochemistryhydrocarbonsLeg 207lithostratigraphyMesozoicn-alkanesNorth AtlanticNorthwest AtlanticOcean Drilling Programocean floorsODP Site 1257ODP Site 1258organic carbonorganic compoundsRock-Evalsedimentary rocksthermal maturityurn:org.iodp:exp:207urnlargerWorkCitationcampaignurn:org.iodp:exp:207:site:1257urnlargerWorkCitationstudyurn:org.iodp:exp:207urnlargerWorkCitationcampaignurn:org.iodp:exp:207:site:1258urnlargerWorkCitationstudyurn:org.iodp:exp:207urnlargerWorkCitationcampaignEnglishgeoscientificInformation-54.4400-54.20309.26009.2712Available only on CD-ROM in PDF format and on the Web in PDF or HTMLapplication/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://www-odp.tamu.edu/publications/207_IR/VOLUME/CHAPTERS/IR207_10.PDFdownload