Analysis points in Figure 5 | C | O | Na | K | Si | Al | Ca | Mg | Mn | Fe | Zn | Pb |
1 | - | 29.46 | - | 1.55 | 5.20 | 2.98 | 2.57 | - | 22.88 | 2.13 | 3.58 | 29.60 |
2 | - | 30.67 | - | 1.22 | 5.77 | 2.92 | 5.02 | - | 21.12 | 2.31 | 3.87 | 27.60 |
3 | - | 25.49 | - | 1.34 | 5.58 | 3.13 | 1.94 | - | 24.82 | 2.00 | 4.01 | 31.69 |
4 | - | 31.96 | - | 1.29 | 6.53 | 3.39 | 3.17 | - | 19.71 | 3.66 | 4.21 | 26.08 |
5 | 14.32 | 41.63 | 0.68 | 5.73 | 17.12 | 11.36 | - | 0.93 | 3.64 | 4.59 | - | - |