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Table 1 X-ray powder diffraction (XRPD) analysis showing quantitative bulk mineralogical composition for the six sandstones sampled from exploration well EPS-1 at the Soultz-sous-Forêts geothermal site (France).
Box number | Depth (m) | Unit | Quartz | Orthoclase | Microcline | Muscovite illite–smectite | Dolomite | Siderite | Hematite | Kaolinite | Chlorite |
|---|---|---|---|---|---|---|---|---|---|---|---|
84 | 1008 | Voltzia | 74.5 ± 1.6 | 3.7 ± 1.9 | 9.3 ± 0.8 | 6.0 ± 2.9 | 4.7 ± 0.1 | 1.9 ± 0.2 | – | – | – |
100 | 1022 | Intermédiaires | 78.9 ± 1.7 | 5.6 ± 0.0 | 9.7 ± 0.5 | 5.0 ± 2.5 | 1.0 ± 0.3 | – | – | – | – |
157 | 1069 | Karlstal | 89.2 ± 0.4 | 4.6 ± 1.1 | 4.0 ± 1.7 | 2.0 ± 0.8 | 0.2 ± 0.1 | – | – | – | – |
198 | 1107 | Karlstal | 89.0 ± 1.1 | 3.2 ± 0.2 | 4.6 ± 0.0 | 3.2 ± 1.3 | – | – | – | – | – |
402 | 1290 | Trifels | 86.7 ± 1.6 | 3.0 ± 0.8 | 6.6 ± 0.3 | 3.5 ± 2.1 | – | – | 0.3 ± 0.0 | – | – |
540 | 1414 | Anté-Annweiler | 66.4 ± 4.0 | 4.4 ± 0.9 | 10.7 ± 0.7 | 13.1 ± 6.0 | 4.2 ± 0.5 | – | 1.4 ± 0.1 | – | – |