georefid:2005-004703georefid:2005-004697SEDIS 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.192.103.2004<gco:CharacterString>Low-temperature alteration of upper oceanic crust from the Ontong Java Plateau, Leg 192; alteration and vein logs</gco:CharacterString>2004-01-01publicationgeorefid:2005-004703doi:10.2973/odp.proc.sr.192.103.2004Banerjee, Neil R.University of Alberta, School of Earth and Ocean Sciences, Edmonton, AB, CanadaauthorHonnorez, JoseUniversity of Hawaii at Manoa, United StatesauthorTexas A&M University, Ocean Drilling Program, College Station, TX, United StatespublisherdocumentDigitalIn: Fitton, J. Godfrey, Mahoney, John J., Wallace, Paul J., Antretter, Maria J., Banerjee, Neil R., Bergen, James A., Cairns, Graeme, Castillo, Paterno R., Chambers, Lynne M., Chazey, William J., III, Coffin, Millard F., Godard, Marguerite M., Hall, Stuart A., Honnorez, Jose, Ingle, Stephanie P., Kroenke, Loren W., MacLeod, Kenneth G., Naruse, Hajime, Neal, Clive R., Ogg, James G., Riisager, Peter, Sano, Takahashi, Sikora, Paul J., van der Werff, Wietze, White, Rosalind V., Zhao, Xixi, Proceedings of the Ocean Drilling Program; scientific results; basement drilling of the Ontong Java Plateau; covering Leg 192 of the cruises of the drilling vessel JOIDES Resolution; Apra Harbor, Guam, to Apra Harbor, Guam; Sites 1183-1187; 8 September-7 November 2000192This paper presents alteration data for basalts from Ocean Drilling Program (ODP) Sites 1183, 1185, 1186, and 1187 drilled on the Ontong Java Plateau during Leg 192. The entire sequence of recovered basaltic basement has undergone low-temperature water-rock interactions. Alteration and vein logs were compiled for each hole from visual core descriptions made aboard the ship. These logs quantify the alteration types, provide a consistent alteration characterization of the samples, and provide a method for estimation of downhole variations in basalt alteration and vein abundance/mineralogy. The three main alteration types identified include gray basalt, black or dusky green halos, and brown or olive halos. Secondary minerals, in order of decreasing abundance, include phyllosilicates, calcite, pyrite, chalcedony, quartz, Fe oxyhydroxides, and zeolites. Veins commonly contain smectite and/or celadonite, Fe oxyhydroxide or pyrite, and calcite. Alteration of basalts from the Ontong Java Plateau is similar to that observed from other Deep Sea Drilling Program/ODP sites drilled into the upper oceanic crust.completedIgneous and metamorphic petrologyalterationbasaltscorescrustglasseshaloesigneous rocksLeg 192low temperaturemineral compositionOcean Drilling Programoceanic crustODP Site 1183ODP Site 1185ODP Site 1186ODP Site 1187Ontong Java PlateauPacific Oceanphenocryststemperatureupper crustveinsvolcanic rockswater-rock interactionWest PacificX-ray diffraction dataurn:org.iodp:exp:192urnlargerWorkCitationcampaignurn:org.iodp:exp:192:site:1183urnlargerWorkCitationstudyurn:org.iodp:exp:192urnlargerWorkCitationcampaignurn:org.iodp:exp:192:site:1185urnlargerWorkCitationstudyurn:org.iodp:exp:192urnlargerWorkCitationcampaignurn:org.iodp:exp:192:site:1186urnlargerWorkCitationstudyurn:org.iodp:exp:192urnlargerWorkCitationcampaignurn:org.iodp:exp:192:site:1187urnlargerWorkCitationstudyurn:org.iodp:exp:192urnlargerWorkCitationcampaignEnglishgeoscientificInformation157.0100161.4000-1.11000.5600Available 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/192_SR/VOLUME/CHAPTERS/103.PDFdownload