The long-term buffering of the oceans

Details The long-term buffering of the oceans The long-term buffering of the oceans

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976gecoa..40.1523m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 40, Issue 12, pp.1523-1532

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7

Scientific paper

The dissolved constituents being carried to the oceans by rivers cannot all be removed by sedimentary processes, including authigenesis. Direct introduction of formation waters to the oceans has no significant effect. Reaction of seawater with basaltic rocks is, however, potentially capable of removing the excess cations by a combination of low-temperature weathering (removing K + ), and higher temperature hydrothermal reaction (removing Na + and Mg 2+ ), although these processes seem to release more silica than can be conveniently accounted for. Although these are essentially kinetic rather than equilibrium buffer mechanisms, they appear to be sufficient to have maintained a constant seawater composition (except for SiO 2 ) during the Phanerozoic.

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