CaCO 3 solubility in marine sediments: Evidence for equilibrium and non-equilibrium behavior

Details CaCO 3 solubility in marine sediments: Evidence for equilibrium and non-equilibrium behavior CaCO 3 solubility in marine sediments: Evidence for equilibrium and non-equilibrium behavior

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985gecoa..49..877s&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 49, Issue 3, pp.877-888

Physics

4

Scientific paper

Studies of the ion concentration product (ICP) [ Ca 2+ ] × [ CO 3 2- ]in the pore waters of marine sediments have been carried out using in situ sampling techniques. For sediments near the sedimentwater interface the ICP of the pore waters is indistinguishable from that predicted from laboratory studies of calcite solubility at 1 atm. The pressure dependence of calcite solubility is also consistent with laboratory studies. At depths greater than ten to fifteen cm enhanced solubility is almost always seen. In some instances ICP gradients occur in the upper 15 cm. The ICP increases indicate that calcite solubility cannot be adequately described by a single thermodynamic equilibrium constant.

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