georefid:2005-035036SEDIS 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=2005-0350362004-01-01publicationgeorefid:2005-035036Nuernberg, DirkGeomar Research Center for Marine Geosciences, Kiel, Federal Republic of GermanyauthorBrughmans, NatasjaUniversity of California at Santa Barbara, United StatesauthorSchoenfeld, JoachimTexas A&M University, United StatesauthorNinnemann, UlyssesUniversity of Bergen, NorwayauthorDullo, ChristianauthorAmerican Geophysical Union, Washington, DC, United StatespublisherdocumentHardcopyIn: Exon, Neville F. (editor), Kennett, James P. (editor), Malone, Mitchell (editor), The Cenozoic Southern Ocean; tectonics, sedimentation, and climate change between Australia and Antarctica151291-318The Tasmanian Gateway, focus of ODP Leg 189, is a key oceanographic area within the Southern Ocean. Our investigations concentrate on the last 500,000 years of sedimentation at Sites 1168 (western Tasmanian margin), 1170 and 1171 (Tasman Rise), and 1172 (East Tasman Plateau). A suite of geochemical proxy data reflecting paleo-export production, terrigenous flux, and sea surface temperature, constrain temporal and spatial variations in surface water masses and oceanographic frontal systems over these sites. Interglacial periods were commonly of low productivity and less affected by terrigenous matter supply, suggesting that the position of the Subtropical Convergence remained south of Tasman Rise. Only during early MIS 11 and MIS 9 over the southern Tasman Rise, and during MIS 7 over the northern Tasman Rise, did enhanced marine productivity, combined with an enhanced terrigenous flux, indicate waxing influence of subantarctic waters. During glacial MIS 2, marine productivity and terrigenous flux increased significantly at Sites 1168, 1170, and 1171 implying that the Subtropical Convergence moved northward to west of Tasmania. (modif. j. abstr.)completedStratigraphyalgaeAnomalinidaeAustralasiaAustraliaBuliminaceaC-13/C-12CalcidiscusCalcidiscus macintyreicarbonCassidulinaceaCenozoicchronostratigraphyCibicidoidesCibicidoides mundulusCibicidoides wuellerstorfiCoccolithophoraceaeEast Australian CurrentEast Tasman PlateauEmilianiaEmiliania huxleyiForaminiferaglacial environmentGlobigerinaGlobigerina bulloidesGlobigerinaceaGlobigerinidaeGloborotaliaGloborotalia truncatulinoidesGloborotaliidaeicehouse effectinterglacial environmentInvertebrataisotope ratiosisotopesLeg 189microfossilsnannofossilsnannoplanktonO-18/O-16Ocean Drilling ProgramODP Site 1168ODP Site 1170ODP Site 1171ODP Site 1172oxygenPacific Oceanpaleo-oceanographypaleoclimatologyplanktonPlantaeproductivityProtistaQuaternaryRotaliinasea-surface temperaturesedimentationSouth PacificSouth Tasman RiseSouthern OceanSouthwest Pacificstable isotopesSubtropical Convergence ZoneTasman SeaTasmania AustraliaTasmanian Gatewayterrigenous materialsUvigerinaUvigerina pygmeaUvigerinidaeWest Pacificurn:org.iodp:exp:189urnlargerWorkCitationcampaignurn:org.iodp:exp:189:site:1168urnlargerWorkCitationstudyurn:org.iodp:exp:189urnlargerWorkCitationcampaignurn:org.iodp:exp:189:site:1170urnlargerWorkCitationstudyurn:org.iodp:exp:189urnlargerWorkCitationcampaignurn:org.iodp:exp:189:site:1171urnlargerWorkCitationstudyurn:org.iodp:exp:189urnlargerWorkCitationcampaignurn:org.iodp:exp:189:site:1172urnlargerWorkCitationstudyurn:org.iodp:exp:189urnlargerWorkCitationcampaignEnglishgeoscientificInformation144.2400149.5600-48.3000-42.3600