georefid:2003-045870georefid:2003-045862SEDIS 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=10.2973/odp.proc.ir.189.108.20012001-01-01publicationgeorefid:2003-045870doi:10.2973/odp.proc.ir.189.108.2001Christie, David M.Oregon State University, College of Oceanic and Atmospheric Sciences, Corvallis, OR, United StatesauthorPedersen, Rolf B.Universitetet i Bergen, NorwayauthorMiller, D. JayOcean Drilling Program, United StatesauthorBalzer, Vaughn G.ODP/Naturalia et Biologia, FranceauthorEinaudi, FlorenceUniversity of London, United KingdomauthorGee, M. A. MaryChristian-Albrechts-Universitaet zu Kiel, Federal Republic of GermanyauthorHauff, FolkmarIsotope Geosciences Laboratory, United KingdomauthorKempton, Pamela D.Academia Sinica, TaiwanauthorLiang, Wen-TzongCentre de Recherches Petrographiques et Geochimiques, FranceauthorLysnes, KristineUniversity of Tokyo, JapanauthorMeyzen, Christine M.Universitetet i Bergen, NorwayauthorPyle, Douglas G.Ocean Drilling Program, United StatesauthorRusso, Christopher J.ODP/Naturalia et Biologia, FranceauthorSato, HiroshiUniversity of London, United KingdomauthorThorseth, Ingunn H.Christian-Albrechts-Universitaet zu Kiel, Federal Republic of GermanyauthorTexas A&M University, Ocean Drilling Program, College Station, TX, United StatespublisherdocumentDigitalIn: Christie, David M., Pedersen, Rolf B., Miller, D. Jay, Balzer, Vaughn G., Einaudi, Florence, Gee, M. A. Mary, Hauff, Folkmar, Kempton, Pamela D., Liang, Wen-Tzong, Lysnes, Kristine, Meyzen, Christine M., Pyle, Douglas G., Russo, Christopher J., Sato, Hiroshi, Thorseth, Ingunn H., Bridges, Brenda (editor), Proceedings of the Ocean Drilling Program, initial reports, mantle reservoirs and migration associated with Australian Antarctic rifting; covering Leg 187 of the cruises of the drilling vessel JOIDES Resolution; Fremantle, Australia, to Fremantle, Australia; sites 1152-1164, 16 November 1999-10 January 2000187Site 1157 was located in Zone A. The purpose of this site was to test for occurrences of Indian-type mantle beneath Zone A. Hole 1157A was abandoned because of the drilling problems of poor drilling conditions and recovery. 2.9 meters of rubble were recovered. The rubble was made up of basalt and basalt-carbonate breccia; both aphyric and moderately plagioclase-olivine phyric basalts were present. All material from this hole has been assigned to one lithologic unit; basaltic rubble with intervals of basalt-carbonate breccia. The unit is composed of poorly sorted lithic clasts derived from aphyric basalt and moderately plagioclase-olivine phyric basalt. Alternation of clasts preceeded final brecciation with some (some halos terminate at a broken clast surfaces), other clasts are rimmed by low-alteration halos. Hole 1157B yielded 11.7 meters (29% recovery) of sparsely to moderately plagioclase-olivine phyric pillow basalt. The basalt had a moderate degree of low-temperature alteration. As in all the sites up until now, the rocks have lower MgO contents than the glasses. Ba and Zr contents suggest an Indian-type mantle source for lavas at Site 1157; this is the first Indian trace element signature observed in Zone A. Igneous petrology, alteration, microbiology, structural geology, site geophysics, sediments, and geochemistry studies were carried out. Data tables and figures are found at the end of the chapter.(LEL)completedIgneous and metamorphic petrologyalterationAntarctic OceanAustralian-Antarctic discordancebasaltsbrecciaCenozoiccoresfracturesgeochemistrygeophysical methodsgeophysical profilesgeophysical surveysigneous rocksIndian OceanLeg 187Mid-Indian Ridgemineral compositionOcean Drilling Programocean floorsODP Site 1157OligocenePaleogeneseismic methodsseismic profilesSoutheast Indian RidgesurveysTertiaryupper Oligoceneveinsvolcanic rocksurn:org.iodp:exp:187urnlargerWorkCitationcampaignurn:org.iodp:exp:187:site:1157urnlargerWorkCitationstudyurn:org.iodp:exp:187urnlargerWorkCitationcampaignEnglishgeoscientificInformation-157.5318127.5318-43.1542-43.1542Available only on CD-ROM and on the Web in PDF formatapplication/pdfunknownSEDIS Publication Catalogue

ana.macario@awi.de

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