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Table 3 X-ray powder diffraction (XRPD) analysis showing quantitative bulk mineralogical composition for the three quarry rocks (see Fig. 1c for quarry locations)
Rock name | Rothbach | Adamswiller | Bust |
|---|---|---|---|
Depth (m) | quarry | quarry | quarry |
Stratigraphic unit | Karlstal | Voltzia | Voltzia |
Quartz | 82.8 ± 0.5 | 71.8 ± 0.6 | 67.4 ± 1.0 |
Orthoclase | 7.8 ± 0.2 | 10.4 ± 0.2 | 10.4 ± 0.2 |
Microcline | 7.1 ± 0.2 | 11.8 ± 0.5 | 13.5 ± 0.5 |
Muscovite/Illite–Smectite | 1.8 ± 0.5 | 3.7 ± 1.0 | 4.0 ± 1.0 |
Kaolinite | – | – | 3.6 ± 0.5 |
Chlorite | – | 1.7 ± 0.2 | – |
Dolomite | – | – | 0.5 ± 0.1 |
Siderite | – | – | – |
Haematite | 0.4 ± 0.2 | 0.7 ± 0.2 | 0.5 ± 0.1 |