| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.602 | 0.589 | 0.507 | 4.818 |
| Arsenic | As (ppm) | 5.053 | 1.903 | 0.814 | 14.843 |
| Calcium | Ca (wt%) | 4.576 | 2.982 | 0.060 | 16.278 |
| Copper | Cu (ppm) | 7.522 | 1.696 | 1.024 | 14.485 |
| Iron | Fe (wt%) | 1.379 | 0.390 | 0.231 | 2.373 |
| Mercury | Hg (ppm) | 0.011 | 0.003 | 0.010 | 0.037 |
| Magnesium | Mg (wt%) | 0.251 | 0.065 | 0.025 | 0.457 |
| Manganese | Mn (ppm) | 404.965 | 102.315 | 77.723 | 758.888 |
| Sodium | Na (wt%) | 0.187 | 0.067 | 0.018 | 0.509 |
| Phosphorus | P (wt%) | 0.028 | 0.008 | 0.005 | 0.058 |
| Lead | Pb (ppm) | 12.265 | 3.655 | 2.032 | 22.756 |
| Selenium | Se (ppm) | 0.204 | 0.082 | 0.100 | 0.578 |
| Titanium | Ti (wt%) | 0.206 | 0.055 | 0.061 | 0.371 |
| Zinc | Zn (ppm) | 24.125 | 8.020 | 4.164 | 61.681 |