Type of rock Name sample | High Magnesian-basalts (HMg-B) | ||||||||||||||
Basanite |
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BAF 22 | BAF 42 | ||||||||||||||
n˚ | 13/1 | 20/1 | 24/1 | 26/1 | 25/1 | 27/1 | 30/1 | 31/1 | 33/1 | 80/1 | 81/1 | 87/1 | 89/1 | 90/1 | 91/1 |
Position | ϕ | ϕ | ϕ/core | ϕ/rimext | ϕ/rim | ϕ | ϕ/core | ϕ/rim | µ | ϕ/core | ϕ/rim | ϕ | µ | ϕ/core | ϕ/rim |
SiO2 | 45.58 | 48.09 | 48.93 | 46.74 | 45.62 | 47.63 | 46.22 | 47.05 | 43.13 | 50.75 | 42.11 | 48.09 | 44.45 | 48.67 | 44.27 |
TiO2 | 3.41 | 1.55 | 1.49 | 3.18 | 3.38 | 1.77 | 2.98 | 2.84 | 4.44 | 0.31 | 5.39 | 2.49 | 3.68 | 1.46 | 3.89 |
Al2O3 | 7.69 | 6.39 | 7.45 | 6.25 | 7.33 | 5.65 | 6.91 | 6.32 | 7.25 | 2.55 | 9.57 | 5.34 | 7.94 | 6.65 | 8.29 |
Cr2O3 | 0.06 | 0.00 | 0.21 | 0.00 | 0.00 | 0.00 | 0.01 | 0.15 | 0.00 | 0.08 | 0.11 | 0.19 | 0.31 | 0.03 | 0.41 |
FeO | 7.36 | 11.00 | 6.87 | 7.04 | 7.46 | 9.11 | 7.28 | 7.26 | 10.58 | 12.61 | 7.61 | 6.69 | 7.17 | 9.19 | 6.54 |
MnO | 0.15 | 0.28 | 0.09 | 0.09 | 0.15 | 0.24 | 0.12 | 0.15 | 0.18 | 0.36 | 0.14 | 0.12 | 0.15 | 0.18 | 0.07 |
MgO | 12.06 | 10.30 | 14.61 | 12.85 | 12.35 | 12.05 | 12.85 | 13.28 | 11.98 | 11.90 | 10.91 | 14.03 | 12.39 | 11.26 | 12.30 |
CaO | 23.45 | 20.46 | 19.76 | 23.28 | 23.20 | 23.07 | 23.22 | 22.89 | 21.92 | 20.47 | 23.17 | 22.76 | 22.95 | 20.77 | 23.02 |
Na2O | 0.45 | 1.79 | 0.81 | 0.49 | 0.50 | 0.49 | 0.42 | 0.43 | 0.56 | 0.63 | 0.56 | 0.46 | 0.48 | 1.77 | 0.49 |
K2O | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.03 | 0.00 | 0.00 | 0.00 | 0.01 | 0.01 | 0.00 |
P2O5 | 0.00 | 0.06 | 0.00 | 0.00 | 0.02 | 0.02 | 0.00 | 0.01 | 0.07 | 0.01 | 0.05 | 0.01 | 0.00 | 0.04 | 0.01 |
NiO | 0.04 | 0.00 | 0.03 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.06 | 0.00 | 0.00 | 0.00 |
Total | 100.25 | 99.91 | 100.24 | 99.91 | 100.00 | 100.04 | 100.02 | 100.38 | 100.15 | 99.67 | 99.62 | 100.22 | 99.53 | 100.01 | 99.29 |
Formula based on 4 cations and 6 oxygen atoms | |||||||||||||||
Si | 1.70 | 1.80 | 1.79 | 1.74 | 1.70 | 1.78 | 1.72 | 1.74 | 1.62 | 1.92 | 1.59 | 1.78 | 1.66 | 1.80 | 1.66 |
Al iv | 0.30 | 0.20 | 0.21 | 0.26 | 0.30 | 0.22 | 0.28 | 0.26 | 0.32 | 0.08 | 0.41 | 0.22 | 0.34 | 0.20 | 0.34 |
Al vi | 0.03 | 0.08 | 0.11 | 0.01 | 0.02 | 0.03 | 0.02 | 0.02 | 0.00 | 0.03 | 0.01 | 0.01 | 0.01 | 0.09 | 0.02 |
Alt | 0.34 | 0.28 | 0.32 | 0.27 | 0.32 | 0.25 | 0.30 | 0.28 | 0.32 | 0.11 | 0.42 | 0.23 | 0.35 | 0.29 | 0.37 |
Ti | 0.10 | 0.04 | 0.04 | 0.09 | 0.09 | 0.05 | 0.08 | 0.08 | 0.13 | 0.01 | 0.15 | 0.07 | 0.10 | 0.04 | 0.11 |
Cr | 0.00 | 0.00 | 0.01 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.01 | 0.01 | 0.00 | 0.01 |
Fe3+ | 0.11 | 0.16 | 0.07 | 0.10 | 0.13 | 0.13 | 0.13 | 0.11 | 0.23 | 0.07 | 0.13 | 0.10 | 0.14 | 0.15 | 0.12 |
Fe2+ | 0.12 | 0.18 | 0.14 | 0.11 | 0.11 | 0.16 | 0.10 | 0.11 | 0.10 | 0.32 | 0.11 | 0.10 | 0.08 | 0.14 | 0.08 |
Mn | 0.00 | 0.01 | 0.00 | 0.00 | 0.00 | 0.01 | 0.00 | 0.00 | 0.01 | 0.01 | 0.00 | 0.00 | 0.00 | 0.01 | 0.00 |
Mg | 0.67 | 0.57 | 0.80 | 0.71 | 0.69 | 0.67 | 0.71 | 0.73 | 0.67 | 0.67 | 0.61 | 0.77 | 0.69 | 0.62 | 0.69 |
Ca | 0.93 | 0.82 | 0.77 | 0.93 | 0.93 | 0.92 | 0.92 | 0.91 | 0.88 | 0.83 | 0.94 | 0.90 | 0.92 | 0.82 | 0.92 |
Na | 0.03 | 0.13 | 0.06 | 0.04 | 0.04 | 0.04 | 0.03 | 0.03 | 0.04 | 0.05 | 0.04 | 0.03 | 0.03 | 0.13 | 0.04 |
K | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
Total | 4.00 | 4.00 | 4.00 | 4.00 | 4.00 | 4.00 | 4.00 | 4.00 | 4.00 | 4.00 | 4.00 | 4.00 | 4.00 | 4.00 | 4.00 |
Mg# | 85.08 | 76.16 | 84.90 | 86.19 | 86.70 | 81.18 | 87.63 | 86.69 | 86.76 | 67.42 | 85.31 | 88.25 | 89.52 | 81.94 | 89.12 |
Wo | 46.55 | 44.14 | 44.88 | 44.56 | 45.60 | 46.62 | 44.69 | 43.75 | 44.82 | 49.38 | 51.19 | 44.70 | 50.22 | 50.47 | 47.89 |
En | 38.46 | 41.03 | 39.01 | 41.01 | 37.98 | 38.69 | 38.52 | 38.67 | 38.03 | 38.80 | 35.53 | 37.04 | 36.42 | 37.55 | 41.41 |
Fs | 15.00 | 14.83 | 16.11 | 14.43 | 16.42 | 14.69 | 16.79 | 17.58 | 17.15 | 11.81 | 13.28 | 18.25 | 13.35 | 11.98 | 10.70 |