georefid:2007-051491georefid:2007-051482SEDIS 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.193.211.2006<gco:CharacterString>Petrography and geochemistry of jasperoids from Site 1189, Ocean Drilling Program Leg 193</gco:CharacterString>2007-01-01publicationgeorefid:2007-051491doi:10.2973/odp.proc.sr.193.211.2006Binns, Raymond A.CSIRO, Divison of Exploration and Mining, North Ryde, N.S.W., AustraliaauthorTexas A&M University, Ocean Drilling Program, College Station, TX, United StatespublisherdocumentDigitalIn: Barriga, Fernando J. A. S., Binns, Raymond A., Miller, D. Jay, Asada, Ryuji, Bach, Wolfgang, Bartetzko, Anne C. M., Benning, Liane G., Bjerkgard, Terje, Christiansen, Lizet B., Elswick, Erika R., Findlay, Robert, Iturrino, Gerardo J., Kimura, Hiroyuki, Kulange, John B., Lackschewitz, Klas S., Lee, Sang-Mook, Masta, Andrew, Paulick, Holger, Pinto, Alvaro M., Roberts, Stephen, Scott, Steven D., Vanko, David A., Warden, Ian, Yeats, Christopher J., Proceedings of the Ocean Drilling Program; scientific results; anatomy of an active felsic-hosted hydrothermal system, eastern Manus Basin; covering Leg 193 of the cruises of the drilling vessel JOIDES Resolution; Apra Harbor, Guam, to Townsville, Australia; Sites 1188-1191; 7 November 2000-3 January 2001193Bright red "jasperoids" were recovered at three positions during Leg 193 drilling below Roman Ruins (Site 1189) in the PACMANUS hydrothermal field. These do not represent fossil exhalative oxide deposits equivalent to those associated with sulfide chimneys at the Roman Ruins seafloor. Rather, they constitute an integral, relatively early stage involving oxidized fluids in the development of veins and breccias that characterize the mostly sulfidic stockwork zone intersected below Roman Ruins in Hole 1189B. They formed by growth of quartz in open spaces created by hydrofracturing, the characteristic feature being mostly euhedral cores dusted by tiny hematite flakes. In one occurrence there are also frondlike aggregates and possible earlier cavity linings of hematite, overgrown by quartz, that potentially formed by maturation of ferruginous gels first deposited in the openings. The trace element geochemistry of the jasperoids, apart from minor enrichment in uranium, provides no indication that they represent subsurface conduits for fluids that deposit Fe-Mn-Si at the seafloor, though this remains a possibility for some such deposits.completedSedimentary petrologyGeochemistry of rocks, soils, and sedimentsBismarck Seachemical compositionchemically precipitated rockschertconcentrationgeochemistryjasperoidLeg 193Manus Basinmineral compositionOcean Drilling ProgramODP Site 1189Pacific OceanPACMANUS hydrothermal fieldRoman Ruins hydrothermal fieldsedimentary rocksSouth PacificSouthwest Pacifictrace elementswall rocksWest Pacificurn:org.iodp:exp:193urnlargerWorkCitationcampaignurn:org.iodp:exp:193:site:1189urnlargerWorkCitationstudyurn:org.iodp:exp:193urnlargerWorkCitationcampaignEnglishgeoscientificInformation151.4000151.4100-3.4300-3.4300Data report; available only on CD-ROM in PDF format and on the Web in PDF or HTMLapplication/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://www-odp.tamu.edu/publications/193_SR/VOLUME/CHAPTERS/211.PDFdownload