COO-02

COO-03

COO-04

COO-05

COO-06

Volcanic rock

Volcanic rock

Polymictic diatreme breccia

Intrusive rock

Volcanic rock

SiO₂ (wt%)

53.58

46.14

52.75

50.15

50.36

TiO₂

0.83

0.84

0.85

1.11

0.81

Al₂O₃

17.24

21.39

17.87

16.69

20.33

Fe₂O₃

12.88

5.72

8.48

8.92

6.75

MnO

0.12

0.17

0.19

0.32

0.21

MgO

3.22

4.18

3.95

3.84

2.44

CaO

5.40

7.91

5.35

7.49

6.51

Na₂O

0.88

0.73

2.39

2.36

0.00

K₂O

2.26

4.11

1.33

2.38

3.51

P₂O₅

0.28

0.13

0.15

0.24

0.15

LOI

3.30

8.69

6.69

6.49

8.92

Sum

100.00

100.00

100.00

100.00

100.00

Ba (ppm)

270.0

110.0

120.0

110.0

70.0

Co

10.20

29.80

19.90

29.90

37.90

Cr

22.0

16.0

31.0

15.0

25.0

Nb

1.3

1.9

2.4

3.5

1.8

Ni

16.3

13.6

15.2

12.4

20.4

Rb

50.2

57.6

22.7

48.4

16.3

Sr

227.0

282.0

136.5

167.5

277.0

Th

0.56

0.51

0.90

0.78

0.58

V

243.0

223.0

192.0

192.0

218.0

Y

23.5

13.6

20.0

25.4

21.5

Zr

11.8

2.3

60.9

20.4

16.2

Nb/Y

0.06

0.14

0.12

0.14

0.08

Zr/Y

0.50

0.17

3.05

0.80

0.75