| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.156 | 0.542 | 3.921 | 6.701 |
| Arsenic | As (ppm) | 5.278 | 1.771 | 2.536 | 12.059 |
| Calcium | Ca (wt%) | 1.319 | 0.486 | 0.578 | 5.560 |
| Copper | Cu (ppm) | 18.768 | 10.171 | 1.690 | 80.800 |
| Iron | Fe (wt%) | 2.282 | 0.411 | 1.084 | 4.466 |
| Mercury | Hg (ppm) | 0.029 | 0.015 | 0.010 | 0.118 |
| Magnesium | Mg (wt%) | 0.761 | 0.315 | 0.283 | 3.101 |
| Manganese | Mn (ppm) | 506.374 | 191.471 | 199.775 | 1774.430 |
| Sodium | Na (wt%) | 1.147 | 0.189 | 0.761 | 1.638 |
| Phosphorus | P (wt%) | 0.071 | 0.019 | 0.026 | 0.174 |
| Lead | Pb (ppm) | 23.240 | 2.679 | 11.265 | 34.897 |
| Selenium | Se (ppm) | 0.206 | 0.053 | 0.101 | 0.448 |
| Titanium | Ti (wt%) | 0.291 | 0.043 | 0.192 | 0.476 |
| Zinc | Zn (ppm) | 80.723 | 14.482 | 48.375 | 163.816 |