Chemical analyses kaolinite-montmorillonite

Kaolinite seldom occurs interstratified with 2 1 clay minerals although Sudo and Hayashi (1956) described a randomly interstratified kaolinite-montmorillonite in acid clay deposits in Japan. On the basis of the chemical analysis (Si02 = 41.94, A1203 = 30.12, Fe203 = 2.42, FeO = 0 21, MgO = 1.52, CaO = 0.32, Ti02 = 0.40, H20+ =... 

Assuming that goethite and kaolinite are finite solids, enter the chemical analysis into M1NTEQA2, except for the Fe and A1 concentrations. Compare computed ZFe(lII)(aq) and ZAl(aq) concentrations at saturation with goethite and kaolinite to the values in the table. How much Fe and A1 may be in suspension Next assume that the water is in equilibrium with goethite and montmorillonite (make them finite solids). Now what is the computed ZAl(aq) concentration ... 

In each of the different parageneses outlined here, the instability of a mineral can be denoted by its replacement with one or usually several minerals. The rocks in these facies are typified by multi-phase assemblages which can be placed in the K-Na-Al-Si system. This is typical of systems where the major chemical components are inert and where their masses determine the phases formed. The assumptions made in the analysis up to this point have been that all phases are stable under the variation of intensive variables of the system. This means that at constant P-T the minerals are stable over the range of pH s encountered in the various environments. This is probably true for most sedimentary basins, deep-sea deposits and buried sedimentary sequences. The assemblage albite-potassium feldspar-mixed layered-illite montmorillonite and albite-mixed layered illite montmorillonite-kaolinite represent the end of zeolite facies as found in carbonates and sedimentary rocks (Bates and Strahl,... 

Chemical characterization of fines implies the elemental and mineral compositional analysis of migratory fines in porous media. Khilar and Fogler (1998) presented the range in chemical composition of migratory clays primarily of kaolinite, illite, montmorillonite, and chlorite particles in Table 5.6. We observe from this table that silica, Si02, and alumina are the major minerals. 

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