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Science 28 October 1983:
Vol. 222. no. 4622, pp. 413 - 415
DOI: 10.1126/science.222.4622.413
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Articles

Rates of Hydrothermal Reactions

BERNARD J. WOOD 1 and JOHN V. WALTHER 1

1 Department of Geological Sciences, Northwestern University, Evanston, Illinois 60201

The rates of reactions of silicates and aqueous fluids follow zero-order kinetics controlled by the reacting surface area with the rate constant given by the equation: log k[unknown] -2900/T -6.85, where T is temperature and where k has the unit's gram-atoms of oxygen per square centimeter per second. This expression appears to hold for all silicates and for reactions involving dissolution, fluid production, or solid-solid transformations in the presence of a fluid of moderate to high pH.

Submitted on January 17, 1983
Accepted on June 23, 1983


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