Bromine and iodine concentrations in sediments and pore fluids of ODP Leg 112, supplement to: Martin, Jonathan B; Gieskes, Joris M; Torres, Marta; Kastner, Miriam (1993): Bromine and iodine in Peru margin sediments and pore fluids: Implications for fluid origins. Geochimica et Cosmochimica Acta, 57(18), 4377-4389

Jonathan B Martin, Joris M Gieskes, Marta Torres & Miriam Kastner
At the Peruvian convergent margin, two distinct pore fluid regimes are recognized from differences in their Cl- concentrations. The slope pore fluids are characterized by low Cl- concentrations, but elevated Br- and I- concentrations due to biogenic production. The shelf pore fluids exhibit elevated Cl- and Br- concentrations due to diffusive mixing with an evaporitic brine. In the slope pore fluids, the Br-, I-, and NH4+ concentrations are elevated following bacterial decomposition of organic matter,...
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