Changes

[[file:predicting-reservoir-system-quality-and-performance_fig9-48.png|300px|thumb|{{figure number|1}}Water movement processes. After Galloway<ref name=ch09r19 /> and Harrison & Tempel<ref name=ch09r27>Harrison, W. J., and R. N. Tempel, 1993, [http://archives.datapages.com/data/specpubs/resmi1/data/a067/a067/0001/0050/0069.htm Diagenetic pathways in sedimentary basins], in A. D. Horbury, and A. G.  Robinson, eds., Diagenesis and Basin Development: AAPG Studies in Geology 36, p. 69–86.</ref>]]

[[file:predicting-reservoir-system-quality-and-performance_fig9-48.png|300px|thumb|{{figure number|1}}Water movement processes. After Galloway<ref name=ch09r19 /> and Harrison & Tempel<ref name=ch09r27>Harrison, W. J., and R. N. Tempel, 1993, [http://archives.datapages.com/data/specpubs/resmi1/data/a067/a067/0001/0050/0069.htm Diagenetic pathways in sedimentary basins], in A. D. Horbury, and A. G.  Robinson, eds., Diagenesis and Basin Development: AAPG Studies in Geology 36, p. 69–86.</ref>]]

Much [[diagenesis]] occurs in open chemical systems whose initial chemistry is set at deposition. After that, the chemistry of the system changes as flowing water moves chemical components through pores and causes either leaching or cementation of grains. Diffusion also moves chemicals in and out of rocks, although at significantly lower rates. During deep burial, chemical systems close and diagenesis is primarily by pressure solution and quartz overgrowths.<ref name=ch09r66>Wilson, M. D., 1994a, Non-compositional controls on diagenetic processes, in M. D. Wilson, ed., Reservoir Quality Assessment and Prediction in Clastic Rocks: SEPM Short Course 30, p. 183–208. Discusses the effect that variables such as temperature and pressure have on diagenesis of sandstones. A good reference for predicting sandstone reservoir system quality.</ref>

Much [[diagenesis]] occurs in open chemical systems whose initial chemistry is set at deposition. After that, the chemistry of the system changes as flowing water moves chemical components through pores and causes either leaching or cementation of grains. Diffusion also moves chemicals in and out of rocks, although at significantly lower rates. During deep burial, chemical systems close and diagenesis is primarily by pressure solution and [[quartz]] overgrowths.<ref name=ch09r66>Wilson, M. D., 1994a, Non-compositional controls on diagenetic processes, in M. D. Wilson, ed., Reservoir Quality Assessment and Prediction in Clastic Rocks: SEPM Short Course 30, p. 183–208. Discusses the effect that variables such as temperature and pressure have on diagenesis of sandstones. A good reference for predicting sandstone reservoir system quality.</ref>

Galloway<ref name=ch09r19>Galloway, W. E., 1984, [http://archives.datapages.com/data/specpubs/sandsto2/data/a059/a059/0001/0000/0003.htm Hydrogeologic regimes of sandstone diagenesis], in D. A. McDonald, and R. C. Surdam, eds., Clastic Diagenesis: AAPG Memoir 37, p. 3–14.</ref> lists three types of flow of water in a basin:

Galloway<ref name=ch09r19>Galloway, W. E., 1984, [http://archives.datapages.com/data/specpubs/sandsto2/data/a059/a059/0001/0000/0003.htm Hydrogeologic regimes of sandstone diagenesis], in D. A. McDonald, and R. C. Surdam, eds., Clastic Diagenesis: AAPG Memoir 37, p. 3–14.</ref> lists three types of flow of water in a basin:

! Typical cement derivation

! Typical cement derivation

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| Quartz

| [[Quartz]]

| Acidic

| Acidic

| Meteoric feldspars

| Meteoric feldspars