georefid:2004-011522georefid:2004-011510SEDIS 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.186.109.2003<gco:CharacterString>Authigenic carbonates at sites 1150 and 1151</gco:CharacterString>2003-01-01publicationgeorefid:2004-011522doi:10.2973/odp.proc.sr.186.109.2003Ijiri, AkiraHokkaido University, Division of Earth and Planetary Sciences, Kitaku, JapanauthorSakamoto, TatsuhikoCarnegie Institution of Washington, United StatesauthorTsunogai, UrumuOcean Drilling Program, United StatesauthorGamo, ToshitakaUniversity of Tokyo, JapanauthorSaito, SaneatsuStockholm University, SwedenauthorSuyehiro, KiyoshiHokkaido University, JapanauthorTexas A&M University, Ocean Drilling Program, College Station, TX, United StatespublisherdocumentDigitalIn: Suyehiro, Kiyoshi, Sacks, I. Selwyn, Acton, Gary D., Acierno, Michael J., Araki, Eiichiro, Ask, Maria V. S., Ikeda, Akihiro, Kanamatsu, Toshiya, Kim, Gil Young, Li, Jingfen, Linde, Alan T., McWhorter, Paul N., Mora, German, Najman, Yanina M. R., Niitsuma, Nobuaki, Pandit, Benoy K., Roller, Sybille, Saito, Saneatsu, Sakamoto, Tatsuhiko, Shinohara, Masanao, Sun, Yue-Feng, Proceedings of the Ocean Drilling Program, scientific results, Western Pacific geophysical observatories; covering Leg 186 of the cruises of drilling vessel JOIDES Resolution; Yokohama, Japan, to Yokohama, Japan; sites 1150 and 1151, 14 June-14 August 1999186Several carbonaceous layers or fragments were recovered from sediments of Sites 1150 and 1151 on the deep-sea terrace of the Japan Trench during Leg 186. The X-ray diffraction analysis (XRD) data indicate that these are predominantly dolomitic. In this study, carbon and oxygen isotopes of these carbonates recovered at Sites 1150 and 1151 are presented. The oxygen isotope ratios of the dolomites analyzed range from +0.4 to +4.1 vs. Peedee formation belemnite (PDB) and those of calcites from +0.6 to +2.8 PDB. The isotopic composition of carbon varies from -7.0 to +12.3 PDB in dolomite and from -13.4 to -24.1 PDB in calcite. The wide range of carbon isotopic compositions indicates that the carbonate samples were formed by the decomposition of organic matter through reactions such as oxidation, sulfate reduction, and methane formation during diagenesis.completedIsotope geochemistryOceanographyauthigenic mineralsC-13/C-12calcitecarboncarbonatesgeochemistryisotope ratiosisotopesJapan TrenchLeg 186marine environmentmarine sedimentsNorth PacificNorthwest PacificO-18/O-16Ocean Drilling ProgramODP Site 1150ODP Site 1151oxygenPacific Oceansample preparationsedimentsstable isotopesWest PacificX-ray diffraction dataurn:org.iodp:exp:186urnlargerWorkCitationcampaignurn:org.iodp:exp:186:site:1150urnlargerWorkCitationstudyurn:org.iodp:exp:186urnlargerWorkCitationcampaignurn:org.iodp:exp:186:site:1151urnlargerWorkCitationstudyurn:org.iodp:exp:186urnlargerWorkCitationcampaignEnglishgeoscientificInformation143.2000143.200038.450039.1100Data 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/186_SR/VOLUME/CHAPTERS/109.PDFdownload