georefid:1985-060147SEDIS 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=1985-0601471983-01-01publicationgeorefid:1985-060147Dominik, J.Univ., Inst. Sedimentforsch., Heidelberg 6900, Federal Republic of GermanyauthorStoffers, P.authorGlasby, G. P.authorGustav Fischer Verlag, Jena, Federal Republic of GermanypublisherdocumentHardcopyChemie der Erde42 (1)1-14Detailed X-ray examination of the clay mineral composition of eight DSDP (super 1) ) sediment cores allows us to outline the main features of the clay sedimentation in the eastern Indian Ocean since Cretaceous time. Smectite is by far the most abundant clay mineral in Cretaceous sediments. Tertiary sediments are characterized by a large terrigenous input of kaolinite indicating tropical wheathering conditions on the adjacent land areas. Since the Neogene, a freshly eroded clay mineral assemblage dominated by illite has been supplied to the northern part of the Wharton Basin, predominantly by distant turbidites from the Bengal Fan. Palygorskite is a common mineral in the eastern Indian Ocean sediments. A diagenetic origin is suggested for the palygorskite in the Upper Cretaceous to Eocene sediments whereas the palygorskite-sepiolite found in Miocene sediments is thought to be of detrital origin.completedOceanographyareal studiesCenozoicclay mineralogyclay mineralsCretaceousDeep Sea Drilling Projectdeep-sea sedimentationdiagenesisEast Indian OceanEoceneexpeditionsIndian OceanLeg 22Leg 26Leg 27marine sedimentationMesozoicMioceneNeogenePaleogenepalygorskiteprocessessedimentary petrologysedimentationsheet silicatessilicatessmectitestratigraphyTertiaryurn:org.iodp:exp:22urnlargerWorkCitationcampaignurn:org.iodp:exp:26urnlargerWorkCitationcampaignurn:org.iodp:exp:27urnlargerWorkCitationcampaignEnglishgeoscientificInformation20.0000147.0000-60.000025.0000Indian Ocean