Table 1 Composition of the clays A to D (in %)
Mineral component | Clay A | Clay B | Clay C | Clay D | Clay E | Clay F | Clay G | Clay H |
|---|---|---|---|---|---|---|---|---|
Albite | – | – | 4 | – | – | 3 | 2 | – |
Phyllosilicates | 94 | 65 | 61 | 33 | 93 | 77 | 82 | 24 |
Quartz | 2 | 28 | 29 | 44 | 2 | 20 | 12 | 74 |
Orthoclase | 4 | 4 | 4 | 2 | – | – | 4 | 2 |
Anatase | – | 3 | 1 | 1 | 2 | – | – | – |
Anhydrite | – | – | – | 1 | – | – | – | – |
Haematite | – | – | 2 | – | – | – | – | – |
Amorphous content | – | – | – | 19 | – | – | – | – |
Phyllosilicates | Â | Â | Â | Â | Â | Â | Â | Â |
Kaolinite | 78 | 40 | 23 | 12 | 87 | 68 | 5 | 6 |
Muscovite | 16 | 10 | 19 | 21 | 6 | 9 | 4 | 18 |
Smectite | – | 5 | 3 | – | – | – | – | – |
Montmorillonite | – | – | – | – | – | – | 71 | – |
Chlorite | – | – | 3 | – | – | – | 2 | - |
Strata chlorite/smectite | – | 5 | 3 | – | – | – | – | – |
Strata illite/smectite | – | 5 | 10 | – | – | – | – | – |