Table 1.
X-ray diffraction (XRD) results of minerals present within each of the six earths. Composition in weight %.
| Minerals | 01277 | 01405 | 01406 | 01627 | 01629-1 | 01629-2 |
|---|---|---|---|---|---|---|
| Calcite | 34.5 | |||||
| Dolomite | 22.1 | |||||
| Gypsum | 1.5 | |||||
| Illite | 6.9 | 4.5 | 7.2 | 33 | 13.1 | 3.3 |
| Jarosite | 0.6 | |||||
| Kaolinite | 5.2 | 49.7 | 54.1 | 26 | 45.4 | 66.5 |
| K-feldspar | 2.8 | 2 | 2.6 | 3.8 | 1.9 | |
| Plagioclase (albite) | 2.4 | 1.2 | 2.4 | 1.2 | 1.1 | 1.6 |
| Quartz | 24 | 27.2 | 30 | 32 | 28.1 | 26.1 |
| Goethite | 8 | 3.7 | ||||
| Hematite | 5.1 | 7 | ||||
| Chlorite | 0.7 | 2.7 | ||||
| Anatase | 1.6 | 1 | 0.4 | 1.1 | 0.6 | |
| Siderite | 0.6 | 0.5 | ||||
| Alunite | 1.3 | |||||
| Anhydrite | 1.7 |