Research Article
Geochemical Mass Balance and Elemental Transport during the Weathering of the Black Shale of Shuijingtuo Formation in Northeast Chongqing, China
Table 3
Correlations among major elements, density, and pH value with principal components.
| | Profile A | Profile B | Profile C | | PC1 | PC2 | PC3 | PC4 | PC1 | PC2 | PC3 | PC4 | PC1 | PC2 | PC3 | PC4 |
| SiO2 | −0.967 | 0.137 | −0.193 | 0.077 | −0.892 | −0.345 | −0.050 | −0.265 | −0.921 | 0.378 | −0.042 | −0.037 | Al2O3 | −0.989 | 0.051 | 0.080 | 0.101 | 0.862 | −0.253 | 0.384 | 0.079 | −0.983 | −0.078 | 0.091 | −0.126 | Fe2O3 | 0.525 | −0.771 | 0.282 | −0.195 | 0.569 | −0.716 | 0.098 | 0.145 | −0.003 | −0.942 | 0.227 | 0.026 | K2O | −0.955 | 0.160 | 0.193 | 0.082 | 0.906 | −0.223 | 0.232 | 0.102 | −0.984 | −0.108 | −0.014 | −0.105 | Na2O | −0.946 | 0.206 | 0.095 | 0.119 | 0.833 | −0.095 | 0.015 | −0.470 | −0.618 | 0.529 | 0.439 | 0.367 | CaO | 0.945 | 0.171 | −0.220 | 0.068 | 0.198 | 0.893 | 0.047 | 0.102 | 0.952 | 0.263 | 0.069 | −0.010 | MgO | 0.878 | 0.128 | 0.238 | 0.371 | 0.806 | 0.403 | 0.280 | 0.222 | 0.813 | 0.283 | 0.322 | −0.349 | P2O5 | 0.265 | −0.899 | −0.010 | 0.203 | −0.629 | 0.177 | 0.533 | 0.340 | 0.857 | 0.240 | −0.346 | 0.144 | SO3 | 0.872 | 0.385 | 0.040 | −0.140 | 0.907 | −0.083 | −0.163 | −0.042 | 0.345 | −0.914 | −0.064 | 0.152 | LOI | 0.852 | 0.495 | 0.100 | −0.041 | 0.332 | 0.315 | −0.731 | 0.472 | 0.968 | −0.203 | 0.091 | −0.001 | ρ | 0.883 | 0.397 | 0.146 | 0.068 | 0.588 | 0.635 | −0.165 | −0.382 | 0.941 | −0.086 | 0.252 | 0.065 | pH | 0.864 | −0.242 | −0.266 | 0.139 | −0.216 | 0.899 | 0.306 | −0.156 | 0.490 | 0.808 | −0.051 | 0.043 | Eigen value | 8.741 | 2.146 | 0.378 | 0.303 | 5.787 | 3.062 | 1.260 | 0.899 | 7.651 | 3.073 | 0.560 | 0.335 | Variance explained (%) | 72.840 | 17.882 | 3.154 | 2.524 | 48.222 | 25.518 | 10.503 | 7.489 | 63.758 | 25.605 | 4.670 | 2.795 | Cumulative variance (%) | 72.840 | 90.721 | 93.875 | 96.400 | 48.222 | 73.740 | 84.243 | 91.731 | 63.758 | 89.363 | 94.033 | 96.828 |
|
|