Carbonate Diagenesis and Porosity

Abstract

1. The Nature of Carbonate Depositional Systems - Comparison of Carbonates and Siliciclastics. Introduction. Consequences of biological influences over carbonate sediments. Sedimentary processes and depositional environments common to both carbonates and siliclastics. Carbonate rock classification. Sedimentary style - the ubiquitous carbonate shoaling upward sequence and cyclicity. Carbonate shelf evolution - response to sea level. The changing nature of carbonate shelf margins in response to global tectonics. Consequences of high chemical reactivity of carbonates relative to siliclastics. Summary. 2. The Classification and Nature of Carbonate Porosity. Introduction. The classification of carbonate porosity. The nature of primary porosity in modern carbonate sediments. Secondary porosity. Summary. 3. Diagenetic Environments of Porosity Modification and Tools for their Recognition in the Geologic Record. Introduction. The diagenetic environments of porosity modification. Tools for the recognition of diagenetic environments of porosity modification in the geologic record. Summary. 4. Normal Marine Diagenetic Environments. Introduction. Shallow water normal marine diagenetic environments. Deep marine diagenetic environments. Summary. 5. Evaporative Marine Diagenetic Environments. Introduction. The marginal marine Sabkha diagenetic environment. Marginal marine evaporative lagoons and basins (reflux dolomitization). Summary. 6. Introduction to Diagenesis in the Meteoric Environment. Introduction. Chemical and mineralogical considerations. Summary. 7. Meteoric Diagenesis Environments. Introduction. The Vadose diagenetic environment as developed in metastable carbonate sequences. The meteoric phreatic diagenetic environment as developed in metastable carbonate sequences. The meteoric diagenetic environment in mature, mineralogically stable systems. Summary. 8. Dolomitization Associated with Meteoric and Mixed Meteoric and Marine Waters. Introduction. Summary. 9. Burial Diagenetic Environment. Introduction. The burial setting. Compaction. Burial cementation. Subsurface dissolution. Subsurface dolomitization. The role of early, surficial depositional and diagenetic processes versus burial processes in shaping ultimate porosity evolution. Predicting changes in porosity with depth. Summary. References. Index.