Chemical composition of sediment samples from ODP Leg 164 sites, Blake Ridge, supplement to: Dickens, Gerald Roy (2001): Sulfate profiles and barium fronts in sediment on the Blake Ridge: Present and past methane fluxes through a large gas hydrate reservoir. Geochimica et Cosmochimica Acta, 65(4), 529-543

Gerald Roy Dickens
Ocean Drilling Program (ODP) Sites 994, 995, and 997 were drilled into a large gas hydrate deposit on the crest of the Blake Ridge (southeast U.S. margin) where upward CH4 fluxes (F_OUT) are related to depths of pore water SO4**2- depletion. High-resolution pore water SO4**2- and sediment Ba profiles have been constructed at these sites to assess present and past F_out. Pore water SO4**2- profiles are linear with zero SO4**2- concentration occurring at 21.4, 21.6,...
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