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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 63 (1979)

Issue: 3. (March)

First Page: 455

Last Page: 455

Title: Dolomitization--Recent Experimental Approaches: ABSTRACT

Author(s): Alan M. Gaines

Article Type: Meeting abstract


Experimental studies of the kinetics of reaction of calcium carbonate with magnesium-calcium chloride solutions indicate a solution-reprecipitation mechanism with a cation-ordered protodolomite as the initial reaction product. Nucleation of ordered dolomite is extremely difficult at low temperatures and is an important factor in the reaction. The kinetics of the reaction are strongly dependent on temperature and on the reactant (calcite or aragonite). Experimental dolomitization of aragonite at 100°C and atmospheric pressure has permitted study of the reaction under conditions approaching those of natural sedimentary environments. These studies indicate that other important kinetic factors include the ionic concentration (salinity), the Mg++:Ca++

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