georefid:2004-082137SEDIS 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=10.1130/G20458.12004-01-01publicationgeorefid:2004-082137doi:10.1130/G20458.1Kuypers, Marcel M. M.Royal Netherlands Institute for Sea Research, Department of Marine Biogeochemistry and Toxicology, Den Burg, Netherlandsauthorvan Breugel, YvonneUniversity of Milan, ItalyauthorSchouten, StefanauthorErba, ElisabettaauthorSinninghe Damste, Jaap S.authorGeological Society of America (GSA), Boulder, CO, United StatespublisherdocumentHardcopyGeology (Boulder)32 (10)853-856The abundance of specific membrane lipids, 2-methylhopanoids, indicates that cyanobacteria played a key role in the seemingly global deposition of black shales during the early Aptian (ca. 120.5 Ma) and late Cenomanian (ca. 93.5 Ma) oceanic anoxic events. Organic matter-rich sediments deposited during these events are characterized by a (super 15) N content typical of newly fixed N (sub 2) , indicating that cyanobacterial N (sub 2) fixation was the main source for nutrient N. We propose that denitrification and anaerobic ammonium oxidation effectively cut off the return of nutrient N from the anoxic deep waters to the photic zone in the oceans, giving N (sub 2) -fixing cyanobacteria a competitive advantage over algae during these oceanic anoxic events.completedStratigraphyIsotope geochemistryanaerobic environmentAptianaromatic hydrocarbonsAtlantic Oceanbiochemistrybiogenic processesblack shaleCenomanianclastic rocksCretaceouscyanobacteriaDeep Sea Drilling ProjectdenitrificationDSDP Site 144DSDP Site 367DSDP Site 463DSDP Site 603EuropefixationFrancegeochemical cyclegeochemistryhopanoidshydrocarbonsIPODisotope ratiosisotopesItalyLeg 14Leg 41Leg 62Lower Cretaceousmarine environmentMesozoicN-15/N-14nitrogenNorth Atlanticnutrientsorganic compoundsPacific Oceanpaleo-oceanographysedimentary rocksSouthern Europestable isotopesTethystriterpanesUpper CretaceousWestern Europeurn:org.iodp:exp:14urnlargerWorkCitationcampaignurn:org.iodp:exp:41urnlargerWorkCitationcampaignurn:org.iodp:exp:62urnlargerWorkCitationcampaignurn:org.iodp:exp:14:site:144urnlargerWorkCitationstudyurn:org.iodp:exp:14urnlargerWorkCitationcampaignurn:org.iodp:exp:41:site:367urnlargerWorkCitationstudyurn:org.iodp:exp:41urnlargerWorkCitationcampaignurn:org.iodp:exp:62:site:463urnlargerWorkCitationstudyurn:org.iodp:exp:62urnlargerWorkCitationcampaignurn:org.iodp:exp:93:site:603urnlargerWorkCitationstudyurn:org.iodp:exp:93urnlargerWorkCitationcampaignurn:org.iodp:exp:95:site:603urnlargerWorkCitationstudyurn:org.iodp:exp:95urnlargerWorkCitationcampaignEnglishgeoscientificInformation-70.0143174.40049.271435.2940With GSA Data Repository Item 2004141