Sulfur geochemistry at ODP Site 112-680 and 112-686, supplement to: Mossmann, Jean-Remi; Aplin, Andrew C; Curtis, Charles D; Coleman, Max L (1990): Sulfur geochemistry at Sites 680 and 686 on the Peru margin. In: Suess, E; von Huene, R; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 112, 455-464

Jean-Remi Mossmann, Andrew C Aplin, Charles D Curtis & Max L Coleman
We have measured the concentrations of (1) pore-water sulfide and (2) solid-phase pyrite, iron monosulfide (=acid volatile sulfide), elemental sulfur, and extractable and nonextractable organic ("kerogen") sulfur in sediments from Ocean Drilling Program (ODP) Sites 680 and 686. Pore-water sulfide defines classic "bell-shaped" profiles. Maximum concentrations of 6 to 12 mM occur where sulfate is exhausted, or is most depleted, at depths between 15 and 50 mbsf. Sulfide resulting from bacterial sulfate reduction reacts in...
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