Abstract:From the early 1980s, the data on the bulk chemical composition of sandstones and mudstones are actively involved for interpretation of the paleogeodynamic settings for sedimentary sequences. Discriminant diagrams such as K2O/Na2O-SiO2/Al2O3 [Maynard et al., 1982], (Fe2O3*+MgO)-K2O/Na2O and others [Bhatia, 1983], SiO2-K2O/Na2O [Roser, Korsch, 1986], (K2O+Na2O)-SiO2/20-(TiO2+Fe2O3+MgO) [Kroonenberg, 1994] etc., are now widely used in regional investigations to classify terrigenous rocks from several paleogeodyn… Show more
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