| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.439 | 0.562 | 3.305 | 5.977 |
| Arsenic | As (ppm) | 7.017 | 7.158 | 2.094 | 61.364 |
| Calcium | Ca (wt%) | 1.241 | 0.348 | 0.591 | 2.728 |
| Copper | Cu (ppm) | 14.068 | 2.450 | 7.149 | 21.524 |
| Iron | Fe (wt%) | 3.690 | 1.005 | 1.851 | 5.769 |
| Mercury | Hg (ppm) | 0.046 | 0.027 | 0.014 | 0.319 |
| Magnesium | Mg (wt%) | 0.541 | 0.060 | 0.375 | 0.824 |
| Manganese | Mn (ppm) | 1025.640 | 214.055 | 493.300 | 1562.340 |
| Sodium | Na (wt%) | 1.190 | 0.152 | 0.900 | 1.544 |
| Phosphorus | P (wt%) | 0.080 | 0.023 | 0.043 | 0.157 |
| Lead | Pb (ppm) | 28.186 | 3.499 | 18.136 | 38.348 |
| Selenium | Se (ppm) | 0.169 | 0.048 | 0.101 | 0.370 |
| Titanium | Ti (wt%) | 0.762 | 0.211 | 0.331 | 1.286 |
| Zinc | Zn (ppm) | 53.976 | 13.026 | 31.871 | 86.904 |