georefid:2005-051338SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.2110/palo.2003.p03-75<gco:CharacterString>Millennial- to centennial-scale interruptions of the oceanic anoxic event 1b (early Albian, mid-Cretaceous) inferred from benthic foraminiferal repopulation events</gco:CharacterString>2005-01-01publicationgeorefid:2005-051338doi:10.2110/palo.2003.p03-75Friedrich, OliverUniversitaet Tuebingen, Institut fuer Geowissenschaften, Tubingen, Federal Republic of GermanyauthorNishi, HiroshiKyushu University, JapanauthorPross, JoergUniversitaet Frankfurt, Federal Republic of GermanyauthorSchmiedl, GerhardUniversitaet Leipzig, Federal Republic of GermanyauthorHemleben, ChristophauthorSociety of Economic Paleontologists and Mineralogists, Tulsa, OK, United StatespublisherdocumentHardcopyPalaios20 (1)64-77The Early Albian Oceanic Anoxic Event 1b (OAE 1b) black shale is interrupted by one or more ventilation events that display significant changes in benthic and planktic populations. Within the OAE 1b sections studied, at ODP Site 1049, DSDP Site 545, and the Vocontian Basin, the benthic foraminiferal repopulation events last between approximately 500 and approximately 1,250 years and occur with a cyclicity of approximately 5.7 kyr. This period may represent an amplitude modulation of the precessional cycle. The OAE 1b sections from the marginal setting of the Vocontian Basin exhibit up to eight repopulation events. In contrast, there is only one repopulation event identified in the Atlantic OAE 1b sections from the Mazagan Plateau (DSDP 545) and Blake Nose (ODP 1049). Within the margin of dating uncertainties, this supraregional repopulation event occurred synchronously in the Vocontian Basin and the Atlantic Ocean. While the OAE 1b black shale formed under extremely warm and humid conditions, the repopulation events occurred during intervals of short-term cooling and reduced humidity at deep-water formation sites. The resulting increase in evaporation led to enhanced formation of low-latitude deep water, thus improving the ventilation of the sea floor.completedStratigraphyAlbianAlpes-de-Haute Provence Franceanaerobic environmentassemblagesAtlantic Oceanbenthic taxaBlake NoseBlake PlateauCenozoicCretaceousDeep Sea Drilling ProjectDrome FranceDSDP Site 545EuropeForaminiferaFranceInvertebrataIPODLeg 171BLeg 79lower AlbianLower Cretaceousmarine environmentMazagan PlateauMediterranean SeaMesozoicmicrofossilsNorth AtlanticOcean Drilling ProgramODP Site 1049organic compoundspaleo-oceanographypaleoecologypaleoenvironmentProtistaquantitative analysisQuaternarysapropelVocontian TroughWestern Europeurn:org.iodp:exp:171BurnlargerWorkCitationcampaignurn:org.iodp:exp:79urnlargerWorkCitationcampaignurn:org.iodp:exp:79:site:545urnlargerWorkCitationstudyurn:org.iodp:exp:79urnlargerWorkCitationcampaignurn:org.iodp:exp:171A:site:1049urnlargerWorkCitationstudyurn:org.iodp:exp:171AurnlargerWorkCitationcampaignEnglishgeoscientificInformation-76.06447.000030.083245.0000