Diagenesis kaolinite

Figure 2. Illustration of the possible displacement of a sedimentary bulk composition upon reduction of Fe + to Fe + during diagenesis (after Velde, 1968). I = illite Chi = chlorite Kaol = Kaolinite M03 = expanding trioctahedral phases 1 = initial bulk composition 2 = reduced bulk composition. Upper diagram shows initial assemblage and the lower diagram those after reduction of Fe +.

Field observations implicating the importance of aluminosilicates to opal diagenesis were followed by laboratory experiments to determine the effect of Al(lll) derived from detrital aluminum silicate on the solubility and dissolution kinetics of opal. Dixit et al. (2001) mixed opal-rich ( 90% Si02) sediments from the Southern Ocean with different amounts of either kaolinite or ground basalt in long-term (21 months) batch... 

Hayes, M.J. Boles, J.R. (1992) Volumetric relations between dissolved plagioclase and kaolinite in sandstones implications for mass transfer in the San Joaquin basin, California. In Origin, Diagenesis, and Petrophysics of Clay Minerals in Sandstones (Eds Houseknocht, D.W. Pittman, E.D.). Spec. Publ. Soc. Econ. Paleont. Miner., Tulsa, 47, 111-123. 

Kaolinite as a mineral characteristic of continental deposits is present virtually throughout all facies studied. However, variations in its composition during the early stages of diagenesis, as compared to those of chlorite, illite and mixed-layer clays, is of no special diagenetic significance. Because of this, it wUl not be discussed at this stage. 

Lanson B (1996) Illitization of diagenitic kaolinite-to-dikite conversion series late stage diagenesis of the Lower Permian Rotliegend sandstone reservoir, offshore of the Netherlands. J Sed Res... 

Rates of many mineral transformations under diagenetic conditions are too slow to measure in the laboratory. In order to model the rate at which kaolinite would transform to illite during burial diagenesis, Chermak and Rimstidt (1990) measured the reaction rates from 250 to 307°C and used the Arrhenius equation... 

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