Sulfur contents and S, C and O isotopic compositions in serpentinized peridotites at ODP Site 153-920, supplement to: Alt, Jeffrey C; Shanks, Wayne C (2003): Serpentinization of abyssal peridotites from the MARK area, Mid-Atlantic Ridge: Sulfur geochemistry and reaction modeling. Geochimica et Cosmochimica Acta, 67(4), 641-653

Jeffrey C Alt & Wayne C Shanks
The opaque mineralogy and the contents and isotope compositions of sulfur in serpentinized peridotites from the MARK (Mid-Atlantic Ridge, Kane Fracture Zone) area were examined to understand the conditions of serpentinization and evaluate this process as a sink for seawater sulfur. The serpentinites contain a sulfur-rich secondary mineral assemblage and have high sulfur contents (up to 1 wt.%) and elevated d34S_sulfide (3.7 to 12.7‰). Geochemical reaction modeling indicates that seawater-peridotite interaction at 300 to 400°C...
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