| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.370 | 0.628 | 1.452 | 5.498 |
| Arsenic | As (ppm) | 7.926 | 1.925 | 2.958 | 15.804 |
| Calcium | Ca (wt%) | 14.475 | 6.188 | 0.208 | 28.796 |
| Copper | Cu (ppm) | 11.809 | 2.668 | 3.020 | 18.573 |
| Iron | Fe (wt%) | 1.654 | 0.363 | 0.720 | 3.366 |
| Mercury | Hg (ppm) | 0.029 | 0.014 | 0.010 | 0.097 |
| Magnesium | Mg (wt%) | 0.517 | 0.102 | 0.135 | 0.889 |
| Manganese | Mn (ppm) | 546.910 | 138.945 | 198.898 | 1169.050 |
| Sodium | Na (wt%) | 0.173 | 0.115 | 0.039 | 0.685 |
| Phosphorus | P (wt%) | 0.042 | 0.012 | 0.015 | 0.100 |
| Lead | Pb (ppm) | 19.345 | 6.232 | 4.205 | 69.354 |
| Selenium | Se (ppm) | 0.536 | 0.231 | 0.103 | 1.842 |
| Titanium | Ti (wt%) | 0.194 | 0.044 | 0.068 | 0.317 |
| Zinc | Zn (ppm) | 42.402 | 8.492 | 21.200 | 75.498 |