georefid:2005-041667georefid:2005-041660SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.2973/odp.proc.sr.182.003.2002<gco:CharacterString>Texture and composition of Quaternary upper-slope sediments in the Great Australian Bight; Sites 1130 and 1132</gco:CharacterString>2004-01-01publicationgeorefid:2005-041667doi:10.2973/odp.proc.sr.182.003.2002Brooks, Gregg R.Eckerd College, Department of Marine Science, Saint Petersburg, FL, United StatesauthorHine, Albert C.Australian Geological Survey Organisation, AustraliaauthorMallinson, DavidTexas A&M University, United StatesauthorDrexler, Tina M.Eidgenoessische Technische Hochschule-Zentrum, SwitzerlandauthorTexas A&M University, Ocean Drilling Program, College Station, TX, United StatespublisherdocumentDigitalIn: Hine, Albert C., Feary, David A., Malone, Mitchell J., Andres, Miriam, Betzler, Christian, Brooks, Gregg R., Brunner, Charlotte A., Fuller, Michael, Molina Garza, Roberto S., Holbourn, Ann E., Huuse, Mads, Isern, Alexandra R., James, Noel P., Ladner, Bryan C., Li, Qianyu, Machiyama, Hideaki, Mallinson, David J., Matsuda, Hiroki, Mitterer, Richard M., Robin, Cecile, Russell, Joellen L., Shafik, Samir, Simo, J. A., Smart, Peter L., Spence, Guy H., Surlyk, Finn C., Swart, Peter K., Wortmann, Ulrich G., Proceedings of the Ocean Drilling Program; scientific results; Great Australian Bight; Cenozoic cool-water carbonates; covering Leg 182 of the cruises of the drilling vessel JOIDES Resolution; Wellington, New Zealand, to Fremantle, Australia; Sites 1126-1134, 8 October-7 December 1998182At Sites 1130 and 1132 of Ocean Drilling Program Leg 182 in the Great Australian Bight, we recovered an expanded Pleistocene section dominated by packstone and wackestone, deposited at unusually high rates of >20 cm/k.y. Shipboard observations detected an intermittent meter-scale alternation of light gray intervals with olive-gray intervals. Meter-scale samples were collected from the upper 250 m at both sites and decimeter-scale samples from four selected 2.5- to 4.0-m intervals in order to determine the texture and composition of sediments deposited along the upper slope throughout the Quaternary. Detailed textural and compositional data are presented from a total of 540 samples collected from both sites. Results indicate a general coarsening upward at both sites, with an accompanying upcore increase in high-Mg calcite (HMC) and aragonite and a decrease in low-Mg calcite (LMC). Samples collected at decimeter-scale intervals substantiate that the alternating light gray and olive-gray units detected on board ship are lithologically distinct. Light gray units consist of an LMC-rich silt, whereas olive-gray units consist of an aragonite and HMC-rich sand and silt. Sediment sources as well as timing and controls of this cyclic depositional pattern will be the subject of further investigations.completedOceanographyStratigraphyAustralasiaAustraliabiostratigraphycarbonatesCenozoiccontinental slopecoresdepositional environmentgrain sizeGreat Australian BightIndian Oceaninner slopeLeg 182magnetostratigraphymarine environmentmarine sedimentsmineral compositionOcean Drilling ProgramODP Site 1130ODP Site 1132PleistoceneQuaternarysedimentsslope environmenttexturesurn:org.iodp:exp:182urnlargerWorkCitationcampaignurn:org.iodp:exp:182:site:1130urnlargerWorkCitationstudyurn:org.iodp:exp:182urnlargerWorkCitationcampaignurn:org.iodp:exp:182:site:1132urnlargerWorkCitationstudyurn:org.iodp:exp:182urnlargerWorkCitationcampaignEnglishgeoscientificInformation127.3608127.3608-33.2512-33.1858Available only on CD-ROM in PDF format and on the Web in PDF or HTML; data reportapplication/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://www-odp.tamu.edu/publications/182_SR/VOLUME/CHAPTERS/003.PDFdownload