Geothermal convection: a mechanism for dolomitization at Enewetak Atoll?

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Geothermal convection in carbonate platforms could drive massive dolomitization by supplying mass transport of magnesium over long periods and at temperatures high enough to overcome kinetic limitations. Reactive-transport simulations based on Enewetak Atoll show dolomitization in a thin band at a permeability contrast near the base of the platform, which is consistent with field observations of dolomitized Eocene deposits. Dolomitization is predicted at approximately 6% per My at temperatures of 45–60°C, and complete dolomitization could be accomplished in ∼16 My. Calcium enrichment of pore fluids and upward transport of these fluids is established early, prior to 30 ky.
Publication type Book
Publication Subtype Conference publication
Title Geothermal convection: a mechanism for dolomitization at Enewetak Atoll?
DOI 10.1016/S0375-6742(00)00048-0
Volume 69-70
Year Published 2000
Language English
Publisher Elsevier Science Publishers B.V.
Publisher location Amsterdam, Netherlands
Larger Work Title Journal of Geochemical Exploration
First page 41
Last page 45
Conference Title Geofluids III - 3rd International Conference on Fluid Evolution, Migration and Interaction in Sedimentary Basins and Orogenic Belts
Conference Location Barcelona, Spain
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