georefid:2005-035023SEDIS 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=2005-035023<gco:CharacterString>Cenozoic environments in the Tasmanian area of the Southern Ocean (ODP Leg 189); inferences from bulk and clay mineralogy</gco:CharacterString>2004-01-01publicationgeorefid:2005-035023Robert, ChristianCentre d'Oceanologie de Marseille, Marseilles, FranceauthorAmerican 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 Antarctica15143-62Bulk and clay mineral investigations of 750 samples from four ODP sites off Tasmania provide insights into Cenozoic environments and their link to global climate and oceanography: Dominant lithologies result from diagenetic alteration of biogenic silica to opal CT and quartz in Paleogene sediments, changes in preservation of biogenic elements, and decreased siliciclastics in the Oligocene; Warm conditions sustained by poleward oceanic heat transfer and seasonal precipitation favored chemical weathering and smectite in the early Paleogene; Precipitation and kaolinite increased in the early Miocene until 16.4 Ma, preceding the expansion of East Antarctic ice (15-14 Ma); Aridity and smectite increased in Southern Australia in the middle Miocene (14-12 Ma) after the expansion of East Antarctic ice as the role of general atmospheric circulation in poleward heat transfer amplified. (modif. j. abstr.)completedStratigraphySedimentary petrologyAntarctic Circumpolar CurrentAntarctic ice sheetAntarcticaarid environmentAustralasiaAustraliaBalleny fracture zonebiogenic processesCenozoicchemical weatheringchloritechlorite groupclastic rocksclay mineralogyclay mineralsclaystoneCretaceousdiagenesisEast Antarctic ice sheetEast Australian CurrentEast Tasman PlateauEoceneerosionframework silicatesilliteIndonesian Seawayisotope ratiosisotopeskaoliniteland bridgesLeg 189Maestrichtianmarine sedimentsMesozoicmicrofossilsMioceneNeogeneO-18/O-16Ocean Drilling ProgramODP Site 1168ODP Site 1170ODP Site 1171ODP Site 1172Oligoceneopalopal-CToxygenPacific Oceanpaleo-oceanographyPaleocenepaleoclimatologypaleoenvironmentPaleogenepelagic environmentPliocenequartzsedimentary rockssedimentsSenoniansheet silicatessilica mineralssilicatessiliceous compositionsiliciclasticssiltstonesmectiteSouth PacificSouth Tasman RiseSouthern OceanSouthwest Pacificstable isotopesTasman SeaTasmania AustraliaTasmanian land-bridgeTasmanian Seawayterrestrial environmentterrigenous materialsTertiarythermohaline circulationUpper CretaceousweatheringWest PacificWest Tasman fracture zoneWilkes Landwind transportwindsurn: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:189urnlargerWorkCitationcampaignEnglishgeoscientificInformation144.0000150.0000-49.0000-42.0000