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 |