Page 324 - Carbonate Facies in Geologic History
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Late diagenetic: replacement after cementation of calcitic matrix Hydrothermal in veins, fractures, collapsed areas
Before emergence Under a body of saline water At sediment-water interface and in sediment Coroong Secular (v.d.Borsch, migration 1%5) of connate Bonaire waters? (DelTeyes et aI., 1%5)
Recognized Within a rock column Seepage reflux? I Adams and Rhodes (1960)
Table X-4. Genetic classification of dolomite formation (modified from Badiozamani, 1973)
Dolomite rock I Early diagenetic: replacement before cementation of calcitic matrix Processes Evaporite precipitation in supratidal sediment Dolomite crusts on Andros lsI. (Shinn et aI., 1965). Evaporative pumping (Hsu and Siegenthaler, 1%8) and/or seepage refluxion (Illinget aI., 1965) on Persian Gulf shores
After or during emergence from the sea Most common processes Mg derived from sea water Concentration Migrating ground water ofMg by re-solution ofMg mixing with calcite in marine marine water "Dorag" sediment by ground water (Badiozamani, and sea water 1973) mixing (Bathurst, 1971) Jamaica reefs (Land, 1972)
Primary precipitation from standing body of water Hypersaline lakes Coroong,S. Australia (Alderman and Skinner, 1957) Deep Springs Lake, California (Clayton et aI., 1%8) Baffin Bay (Behrens and Land, 1972)
