Diagenetic environment

Klein C. and Bricker O. P. (1977). Some aspects of the sedimentary and diagenetic environment of Proterozoic banded iron formation. Econ. Geol, 72 1457-1470. 

Figure 7.16. Different types of cements precipitated in the vadose (left) and phreatic (right) parts of the meteoric diagenetic environment. Epitaxial cements may be precipitated in either environment. (After James and Choquette, 1984.)...

Bermuda A case study of a meteoric diagenetic environment... 

BERMUDA A CASE STUDY OF A METEORIC DIAGENETIC ENVIRONMENT... 

There is a need to explore the chemical and isotopic inhomogeneities and structure of calcite as it continues to stabilize in the diagenetic environment. These features may provide valuable clues to the processes of stabilization of calcite sediments in the meteoric, and other, diagenetic environments. 

Figure 8.16. A hypothetical trend of changes in the stable isotope composition of carbonate cements in different diagenetic environments. A- marine realm B-meteoric realm C- mixing zone D- successively deeper burial for calcite spar E-successively deeper burial for saddle dolomite. B through E are precipitated in progressively hotter waters. (After Choquette and James, 1987.)...

James N.P. and Choquette P.W. (1983) Diagenesis 5 Limestones—The seafloor diagenetic environment. Geoscience Canada 10,162-179. 

Longman M.W. (1980) Carbonate diagenetic textures from near surface diagenetic environments. Amer. Assoc. Petrol. Geol. Bull. 64, 461-487. 

Bohrmann G., Abelmann A., Gersonde R., Hubberten H., and Kuhn G. (1994) Pure sihceous ooze, a diagenetic environment for early chert formation. Geology 22, 207—210. 

Experimental studies of authigenic apatite precipitation. Mechanisms and rates of authigenic apatite formation in the early diagenetic environment are difficult to resolve, because of the wide variety of biological, chemical, and physical factors that can affect its formation. Experimental studies of apatite formation under controlled conditions have provided important information for placing constraints on modes and rates of CEA authigenesis. Examples of such studies include those of Ames (1959), who documented nucleation of CEA on calcium carbonate Gulbrandsen et al. (1984), who documented rates of CEA formation in seawater Jahnke (1984), who evaluated the... 

In these examples as well as for most aquatic sediments, the principal diagenetic reactions that occur in these sediments are aerobic respiration and the reduction of Mn and Fe oxides. Under the slower sedimentation conditions in natural lakes and estuaries, there is sufficient time (years) for particulate organic matter to decompose and create a diagenetic environment where metal oxides may not be stable. When faster sedimentation prevails, such as in reservoirs, there is less time (months) for bacteria to perform their metabohc functions due to the fact that the organisms do not occupy a sediment layer for any length of time before a new sediment is added (Callender, 2000). Also, sedimentary organic matter in reservoir sediments is considerably more recalcitrant than that in natural lacustrine and estuarine sediments as reservoirs receive more terrestrial organic matter (Callender, 2000). 

James, N.P. Choquette, P.W. (1984) Diagenesis 9 - Limestones - the meteoric diagenetic environment. Geoscience Canada 11, 161-194. 

Figure 11.4 (A) Diagenetic environments and typical cements (modified from Fliigel, 1978). (B) Formation of beachrock in relation to other cemented coastal deposits (schematic).

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