| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.947 | 0.591 | 0.675 | 3.706 |
| Arsenic | As (ppm) | 4.238 | 1.405 | 1.512 | 11.568 |
| Calcium | Ca (wt%) | 0.311 | 0.285 | 0.025 | 2.155 |
| Copper | Cu (ppm) | 4.888 | 1.314 | 1.003 | 8.038 |
| Iron | Fe (wt%) | 0.867 | 0.213 | 0.337 | 1.709 |
| Mercury | Hg (ppm) | 0.020 | 0.013 | 0.010 | 0.107 |
| Magnesium | Mg (wt%) | 0.100 | 0.043 | 0.023 | 0.260 |
| Manganese | Mn (ppm) | 242.053 | 117.010 | 52.810 | 782.681 |
| Sodium | Na (wt%) | 0.155 | 0.123 | 0.016 | 0.516 |
| Phosphorus | P (wt%) | 0.009 | 0.002 | 0.005 | 0.020 |
| Lead | Pb (ppm) | 15.477 | 9.403 | 4.272 | 72.259 |
| Selenium | Se (ppm) | 0.163 | 0.053 | 0.100 | 0.386 |
| Titanium | Ti (wt%) | 0.316 | 0.077 | 0.143 | 0.654 |
| Zinc | Zn (ppm) | 16.687 | 5.941 | 4.009 | 36.277 |