COO-07

COO-08

COO-09

Polymictic diatreme breccia

Polymictic diatreme breccia

Volcanic rock

SiO₂ (wt%)

52.57

50.38

48.65

TiO₂

0.82

0.63

0.73

Al₂O₃

17.46

18.65

18.26

Fe₂O₃

8.43

5.40

10.08

MnO

0.19

0.16

0.26

MgO

3.87

3.32

4.72

CaO

6.04

9.10

6.69

Na₂O

2.33

2.30

0.56

K₂O

1.32

0.74

1.23

P₂O₅

0.16

0.14

0.18

LOI

6.81

9.18

8.63

Sum

100.00

100.00

100.00

Ba (ppm)

120.0

80.0

80.0

Co

20.80

13.80

26.40

Cr

23.0

22.0

54.0

Nb

2.3

2.1

1.8

Ni

12.2

11.0

22.8

Rb

19.2

7.5

21.3

Sr

147.5

269.0

212.0

Th

0.82

0.76

0.89

V

189.0

127.0

212.0

Y

21.3

18.7

23.3

Zr

56.1

37.4

20.3

Nb/Y

0.11

0.11

0.08

Zr/Y

2.63

2.00

0.87