Table 3 XRD results of the plaster samples (wt %)
Samples | Quartz | Plagioclase | K-feldspar | Calcite | Gypsum | Montmorillonite | Illite | Chlorite | Kaolinite |
|---|---|---|---|---|---|---|---|---|---|
Zx 1–3 1st coarse layer | 73.3 | 9.0 | 4.3 | — | 1.4 | — | 6.0 | 2.0 | 4.0 |
Gx-2 2nd coarse layer | 75.2 | 6.6 | 3.8 | 0.4 | — | 2.0 | 9.0 | — | 3.0 |
Zx 1–2 2nd coarse layer | 74.6 | 9.9 | 2.6 | — | 0.9 | — | 9.0 | — | 3.0 |
Zb 3–2 2nd coarse layer | 73.0 | 9.6 | 1.2 | 5.9 | 3.3 | — | 4.0 | — | 3.0 |
Zx 1–1 fine layer | 52.7 | 3.7 | — | 31.0 | 5.6 | — | 7.0 | — | — |
Zx 1–9 fine layer | 65.0 | 7.3 | — | 10.4 | 3.3 | — | 7.0 | — | 7.0 |
Gx-3 fine layer | 52.8 | 6.0 | 1.8 | 21.9 | 0.5 | — | 9.0 | 3.0 | 5.0 |
Zb 3–2 fine layer | 57.3 | 6.2 | 1.0 | 24.2 | 0.3 | 1.0 | 7.0 | — | 3.0 |