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

Са32 [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