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Table 1 Modal (i.e., volume percentage) mineralogical composition of sandstone and shale as constrained in the computer-based geochemical models

From: Computerized geochemical modeling of burial diagenesis of the Eocene turbidite reservoir elements: Urucutuca Formation, Espírito Santo Basin, southeastern Brazil passive margin

Mineral Sandstone (%) Shale (%)
Quartz 46.35 21.15
K-feldspar 8.40 3.2
Plagioclase 12.00 4.0
Albie 0.3 4.1
Calcite 0.3 2.7
Dolomite 1.10 1.9
Kaolinite 4.35 3.15
Illite 5.5 49.5
Chlorite 0.5 4.5