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Data report: δ34S and δ18O measurements of dissolved sulfate from interstitial water samples, IODP Expedition 3111
Ulrich G. Wortmann2
34S and 18O measurements of dissolved sulfate were made from interstitial water samples collected during Integrated Ocean Drilling Program Expedition 311. 34S and 18O ratios of dissolved sulfate are modified by microbial processes involving sulfur redox processes; therefore, they can be used to better constrain microbial sulfur cycling. All Expedition 311 sites show clear evidence of organotrophic and methanotrophic sulfate reduction. A full interpretation of these results, however, requires careful reaction-transport modeling, which will be given elsewhere.