| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.466 | 0.558 | 4.585 | 8.728 |
| Arsenic | As (ppm) | 9.430 | 1.940 | 4.420 | 24.321 |
| Calcium | Ca (wt%) | 2.411 | 0.621 | 1.018 | 5.489 |
| Copper | Cu (ppm) | 27.851 | 6.609 | 11.701 | 64.530 |
| Iron | Fe (wt%) | 3.021 | 0.563 | 2.054 | 5.873 |
| Mercury | Hg (ppm) | 0.051 | 0.018 | 0.026 | 0.152 |
| Magnesium | Mg (wt%) | 1.337 | 0.326 | 0.485 | 2.479 |
| Manganese | Mn (ppm) | 653.840 | 167.924 | 177.619 | 1672.400 |
| Sodium | Na (wt%) | 0.911 | 0.244 | 0.197 | 1.734 |
| Phosphorus | P (wt%) | 0.089 | 0.020 | 0.044 | 0.177 |
| Lead | Pb (ppm) | 29.917 | 7.686 | 15.648 | 74.679 |
| Selenium | Se (ppm) | 0.508 | 0.205 | 0.115 | 2.337 |
| Titanium | Ti (wt%) | 0.291 | 0.047 | 0.132 | 0.500 |
| Zinc | Zn (ppm) | 91.430 | 10.132 | 60.080 | 133.867 |