Geothermal convection: a mechanism for dolomitization at Enewetak Atoll?
By: A.M. Wilson, W. Sanford, F. Whitaker, and P. Smart
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Abstract
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.
Suggested Citation
Wilson, A., Sanford, W., Whitaker, F., Smart, P., 2000, Geothermal convection: a mechanism for dolomitization at Enewetak Atoll?, v. 69-70, https://doi.org/10.1016/S0375-6742(00)00048-0.
| 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 |