Science – Society – Technology
Table 1 X-ray powder diffraction (XRPD) analysis showing quantitative bulk mineralogical composition for the six Muschelkalk samples chosen to represent the variability of the Muschelkalk at exploration well EPS-1 (Soultz-sous-Forêts), and three samples from the Buntsandstein at the Muschelkalk–Buntsandstein interface
Lithostratigraphic unit | Formation | True vertical depth (m) | Box number | Anhydrite | Dolomite | Siderite | Calcite | Quartz | K-feldspar | Muscovite/illite | Pyrite |
|---|---|---|---|---|---|---|---|---|---|---|---|
Middle Muschelkalk | Marnes Bariolées | 938.5 | 6 | – | 86 | – | 3 | 7 | 1 | 3 | – |
Middle Muschelkalk | Marnes Bariolées | 957 | 22 | 88 | 11 | – | – | 1 | – | – | – |
Lower Muschelkalk | Couches à Orbicularis and Schaumkalk complex | 967 | 32 | – | 74 | – | – | 4 | – | 18 | 1 |
Lower Muschelkalk | Calcaires Ondulés | 975 | 45 | – | 85 | – | – | 5 | 1 | 10 | – |
Lower Muschelkalk | Wellenmergel and Couches à Térébratules | 988 | 59 | – | 26 | 3 | – | 45 | 10 | 16 | – |
Lower Muschelkalk | Wellenmergel and Couches à Térébratules | 990 | 61 | – | 68 | 1 | – | 8 | 3 | 20 | – |
Buntsandstein | Grès à Voltzia | 1001 | 76 | – | 1 | 9 | – | 58 | 3 | 29 | – |
Buntsandstein | Grès à Voltzia | 1005.5 | 81 | – | 4 | 2 | – | 66 | 10 | 18 | – |
Buntsandstein | Grès à Voltzia | 1006.5 | 82 | – | 11 | 4 | – | 46 | 4 | 35 | – |