Table 2 Statistics on mineral composition and chemical composition of clay.
Quartz | Sodium feldspar | Chlorite | Illite | Kaolinite | Calcite | |
|---|---|---|---|---|---|---|
Mineral composition (%) | 72.28 | 14.98 | 3.70 | 2.03 | 1.77 | 5.24 |
Chemical composition (%) | SiO2 | Al2O3 | CaO | MgO | — | — |
52.2 | 15.2 | 6.3 | 8.3 | — | — |
