Sample code | Gbk_1 | Gbk_2 | Gbk_3 | Gbk_4 | Gbk_5 | Gbk_6 | Gbk_7 | Gbk_8 | NASC | PAAS |
Depth (m) range | 34.7 - 35.7 | 243.5 - 244.8 | 341.7 - 342.6 | 573 - 573.8 | 590 - 591 | 779 - 780.6 | 955.5 - 956.5 | 997.9 - 998.8 |
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Formation | Benin | Ogwashi-Asaba | Oshosun | Ewekoro | Ewekoro | Ewekoro | Araromi | Araromi |
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Lithology | Shale | Shale | Shale | Shale | Shale | Shale | Shale | Shale |
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SiO2 | 48.09 | 54.18 | 40.96 | 51.18 | 47.98 | 44.15 | 44.70 | 41.65 | 64.80 | 62.80 |
TiO2 | 0.942 | 1.357 | 1.420 | 0.691 | 0.783 | 0.727 | 0.857 | 0.933 | 00.70 | 01.00 |
Al2O3 | 17.03 | 22.97 | 24.51 | 12.90 | 15.57 | 15.07 | 21.14 | 21.91 | 16.90 | 18.90 |
Fe2O3T | 06.01 | 5.750 | 6.330 | 5.410 | 6.090 | 5.850 | 6.410 | 7.370 | 05.65 | 07.22 |
MnO | 0.024 | 0.106 | 0.032 | 0.051 | 0.072 | 0.053 | 0.012 | 0.009 | 00.06 | 00.11 |
MgO | 0.130 | 0.650 | 0.300 | 5.900 | 4.450 | 4.860 | 1.120 | 0.590 | 02.86 | 02.20 |
CaO | 0.080 | 0.200 | 0.140 | 0.420 | 2.890 | 5.740 | 1.220 | 4.670 | 03.63 | 01.30 |
Na2O | 0.080 | 0.070 | 0.060 | 0.370 | 0.370 | 0.600 | 0.460 | 0.250 | 01.14 | 01.20 |
K2O | 1.240 | 1.350 | 0.640 | 0.820 | 1.030 | 1.090 | 1.450 | 0.960 | 03.97 | 03.70 |
P2O5 | 0.080 | 0.080 | 0.070 | 0.070 | 0.110 | 0.250 | 0.100 | 0.440 | 00.13 | 00.16 |
LOI | 25.35 | 13.99 | 25.92 | 21.44 | 19.90 | 21.19 | 21.05 | 19.71 | - | - |
Total | 99.07 | 100.7 | 100.4 | 99.26 | 99.24 | 99.58 | 98.52 | 98.48 |
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MgO + Fe2O3T | 6.140 | 1.300 | 6.630 | 11.31 | 10.54 | 10.71 | 7.530 | 7.960 |
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Fe2O3T/K2O | 4.847 | 0.481 | 9.891 | 6.598 | 5.913 | 5.367 | 4.421 | 7.677 |
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Al2O3/TiO2 | 18.08 | 16.93 | 17.26 | 18.67 | 19.89 | 20.73 | 24.67 | 23.48 |
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K2O/Na2O | 15.50 | 19.29 | 10.67 | 2.216 | 2.784 | 1.817 | 3.152 | 3.840 |
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SiO2/Al2O3 | 2.824 | 2.359 | 1.671 | 3.967 | 3.082 | 2.930 | 2.114 | 1.901 |
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Moles |
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SiO2 | 0.800 | 0.902 | 0.682 | 0.852 | 0.798` | 0.735 | 0.744 | 0.693 |
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Al2O3 | 0.167 | 0.225 | 0.240 | 0.127 | 0.153 | 0.148 | 0.207 | 0.215 |
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CaO* | 0.001 | 0.001 | 0.001 | 0.006 | 0.006 | 0.010 | 0.007 | 0.004 |
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Na2O | 0.001 | 0.001 | 0.001 | 0.006 | 0.006 | 0.010 | 0.007 | 0.004 |
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MgO | 0.003 | 0.016 | 0.007 | 0.146 | 0.110 | 0.121 | 0.028 | 0.015 |
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Fe2O3 | 0.038 | 0.036 | 0.040 | 0.034 | 0.038 | 0.037 | 0.040 | 0.046 |
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K2O | 0.013 | 0.014 | 0.007 | 0.009 | 0.011 | 0.012 | 0.015 | 0.010 |
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CaO* + Na2O | 0.002 | 0.006 | 0.003 | 0.004 | 0.004 | 0.020 | 0.021 | 0.002 |
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Fe2O3 + MgO | 0.041 | 0.052 | 0.047 | 0.180 | 0.148 | 0.158 | 0.068 | 0.061 |
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CaO* + Na2O + K2O | 0.015 | 0.020 | 0.010 | 0.013 | 0.015 | 0.032 | 0.036 | 0.012 |
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CIA | 91.76 | 93.36 | 96.39 | 85.81 | 86.93 | 82.22 | 87.71 | 92.27 |
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CIW | 98.82 | 99.12 | 99.17 | 91.36 | 92.73 | 88.10 | 93.67 | 96.41 |
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