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The mineralogical compositions of the studied bulk samples (wt%).
| Sample No | AZ01 | AZ02 | AZ03 | AZ04 | AZ05 | AZ06 | AZ07 | AZ08 | AZ09 | AZ10 |
|---|---|---|---|---|---|---|---|---|---|---|
| Kaolinite | 66 | 69 | 68 | 71 | 64 | 65 | 68 | 63 | 65 | 67 |
| Quartz | 28 | 27 | 31 | 28 | 34 | 34 | 29 | 34 | 33 | 31 |
| Hematite | 3 | 3 | Nd | Nd | Nd | Nd | Nd | 2 | 2 | Nd |
| Illite | 2 | Nd | 1 | 1 | 1 | 1 | Nd | Nd | Nd | 1 |
| Feldspar | Nd | Nd | Nd | Nd | Nd | Nd | 1 | Nd | Nd | 1 |
Nd not detected.
