| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.123 | 0.653 | 0.397 | 3.572 |
| Arsenic | As (ppm) | 2.645 | 0.531 | 1.084 | 4.351 |
| Calcium | Ca (wt%) | 0.045 | 0.011 | 0.010 | 0.069 |
| Copper | Cu (ppm) | 6.491 | 1.740 | 1.676 | 12.833 |
| Iron | Fe (wt%) | 1.021 | 0.213 | 0.476 | 1.488 |
| Mercury | Hg (ppm) | 0.059 | 0.029 | 0.015 | 0.187 |
| Magnesium | Mg (wt%) | 0.039 | 0.010 | 0.011 | 0.060 |
| Manganese | Mn (ppm) | 212.587 | 61.704 | 135.218 | 458.935 |
| Sodium | Na (wt%) | 0.016 | 0.004 | 0.004 | 0.026 |
| Phosphorus | P (wt%) | 0.022 | 0.005 | 0.012 | 0.040 |
| Lead | Pb (ppm) | 21.624 | 7.203 | 9.019 | 43.758 |
| Selenium | Se (ppm) | 0.257 | 0.056 | 0.113 | 0.383 |
| Titanium | Ti (wt%) | 0.435 | 0.032 | 0.355 | 0.505 |
| Zinc | Zn (ppm) | 21.541 | 4.131 | 8.599 | 29.797 |