Type of minerals | Item No. | Mineral | Formula | Range of grades, wt% | Presence in samples |
Main rock forming minerals | 1 | Quartz | SiO2 | 37.0 - 77.7 | In all samples |
2 | Kaolinite | Al2Si2O5(OH)4 | 9.90 - 47.2 | In all samples | |
3 | Muscovite | KAl2[AlSi3O10](OH, F)2 | 1.44 - 18.00 | In 27 samples | |
4 | Illite | K < 1А1 < 2[(Si, Al)4O10](OH)2 × nН2О (generalized formula of a group of minerals referred to hydromica) | 1.14 - 9.22 | In 22 samples | |
5 | Hematite | Fe2O3 | 0.49 - 7.61 | In 26 samples | |
6 | Anatase | TiO2 | 0.34 - 1.40 | In 27 samples | |
7 | Nontronite | Na0.3Fe23+[(Si, Al)4O10] × (OH)2 · nH2O | 6.5 - 30.0 | In Samples 22, 23, 24 | |
8 | Tosudite | Na0.5(Al,Mg)6 × [(Si, Al)8O18] (OH)12·5H2O | 11.62 - 17.8 | In Samples 22, 23, 24 | |
9 | Clinochlore | (Mg, Fe2+)5Al[AlSi3O10] × (OH)8 | 2.45 - 3.47 | In Samples 22, 23, 24 | |
10 | Calcite | Ca(CO)3 | 0.18 - 3.20 | In 12 samples | |
Secondary minerals and minerals, which are rare in this type of rock | 11 | Siderite | Fe2+(CO)3 | 0.34 - 2.46 | In 14 samples |
12 | magnetite | Fe2+Fe23+O4 | 0.28 - 2.44 | In Samples 22, 7, 12, 22 | |
13 | Rutile | TiO2 | 1.23 - 2.32 | In Samples 3, 4, 10, 17 | |
14 | Lizardite | Mg3Si2O5(OH)4 | 1.20 - 3.26 | In Samples 10,17, 21, 22 | |
15 | Ankerite | Ca (Fe2+, Mg, Mn) (CO3)2 | 0.60 - 1.08 | In Samples 21, 26 | |
16 | Gibbsite | γ-Al(OH)3 | 0.67 - 4.88 | In Samples 28, 29 | |
17 | Talc | Mg3[Si4O10](OH)2 | 8.82 | Sample 5 | |
18 | Montmorillonite | (Na,Ca)0.3[(Al, Mg)2Si4O10] × (OH)2·nH2O | 7.05 | Sample 5 | |
19 | Fayalite | Fe2SiO4 | 4.58 | Sample 29 | |
20 | Orthoclase | K[AlSi3O8] | 2.89 | Sample 21 | |
21 | Berthierine (kaolinite-serpentinite group) | (Fe2+, Fe3+, Al)3 × [(Si, Al)2O5](OH)4 | 3.47 | Sample 23 | |
22 | Bernalite | Fe(OH)3 | 2.60 | Sample 31 | |
23 | Andradite | Са3Fе2 [SiO4]3 | 1.97 | Sample 2 | |
24 | Augite | Са(Mg, Fe, Al)[(Si, Аl)2O6] | 1.52 | Sample 20 | |
25 | Aragonite | Ca(CO)3 | 1.49 | Sample 2 | |
26 | Goyazite | SrAl3(PO4)(PO3OH)(OH)6 | 1.19 | Sample 31 | |
27 | Diopside | СаMg[Si2O6] | 1.00 | Sample 26 | |
28 | Magnesio-cafrolite | MgAl2[Si2O6](OH)4 | 0.56 | Sample 26 |