Boettcher, Michael E.; Khim, Boo-Keun; Suzuki, Atsushi (2004): Microbial sulfate reduction in interstitial waters from sediments of the Southwest Pacific (Sites 1119-1124); evidence from stable sulfur isotopes. Texas A&M University, Ocean Drilling Program, College Station, TX, United States, In: Richter, Carl, McCave, I. N., Carter, Robert M., Carter, Lionel, Aita, Yoshiaki, Buret, Christophe, Di Stefano, Agata, Fenner, Juliane, Fothergill, Patrick, Gradstein, Felix, Hall, Ian R., Handwerger, David, Harris, Sara E., Hayward, Bruce, Hu, Shouyun, Joseph, Leah, Khim, Boo-Keun, Lee, Yir-Der, Millwood, Lynn D., Rinna, Joachim, Smith, Gerald, Suzuki, Atsushi, Weedon, Graham P., Wei, Kuo-Yen, Wilson, Gary, Winkler, Amelie, Proceedings of the Ocean Drilling Program; scientific results; Southwest Pacific gateways; covering Leg 181 of the cruises of the drilling vessel JOIDES Resolution; Sydney, Australia, to Wellington, New Zealand; Sites 1119-1125; 11 August-8 October 1998, 181, georefid:2004-051332

Seventy-nine interstitial water samples from six sites (Ocean Drilling Program Sites 1119-1124) from the southwestern Pacific Ocean have been analyzed for stable isotopes of dissolved sulfate (34S), along with major and minor ions. Sulfate from the interstitial fluids (34S values between +20.7 and +57.5 vs. the Vienna-Canyon Diablo troilite standard) was enriched in 34S with respect to modern seawater (34S +20.6), indicating that differing amounts of microbial sulfate reduction took place at all investigated sites. Microbial sulfate reduction was found at all sites, the intensity depending on the availability of organic matter, which is controlled by paleosedimentation conditions (e.g., sedimentation rate and presence of turbidites). In addition, total reduced inorganic sulfur (essentially pyrite) as a product of microbial sulfate reduction was quantified in selected sediments from Site 1119.
West: -177.2337 East: 176.5952 North: -39.2954 South: -50.5353
Expedition: 181
Site: 181-1119
Site: 181-1120
Site: 181-1121
Site: 181-1122
Site: 181-1123
Site: 181-1124
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