Ijiri, Akira; Sakamoto, Tatsuhiko; Tsunogai, Urumu; Gamo, Toshitaka; Saito, Saneatsu; Suyehiro, Kiyoshi (2003): Authigenic carbonates at sites 1150 and 1151. Texas A&M University, Ocean Drilling Program, College Station, TX, United States, In: 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 1999, 186, georefid:2004-011522

Abstract:
Several 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.
Coverage:
West: 143.2000 East: 143.2000 North: 39.1100 South: 38.4500
Relations:
Expedition: 186
Site: 186-1150
Site: 186-1151
Supplemental Information:
Data report; available only on CD-ROM in PDF format and on the Web in PDF or HTML
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=10.2973/odp.proc.sr.186.109.2003 (c.f. for more detailed metadata)
Data download: application/pdf
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