Abstract

An experimental study of dedolomitization shows that effective dedolomitization requires not only the theoretically necessary high initial Ca (super ++) /Mg (super ++) ratio in the dedolomitizing solution, but also a high rate of water flow, a partial pressure of carbon dioxide much lower than 0.5 atm, and temperatures not higher than 50 degrees C. The latter two conditions suggest that, in nature, dedolomitization is a near-surface process.

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