| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.514 | 1.641 | 3.383 | 12.455 |
| Arsenic | As (ppm) | 0.741 | 0.337 | 0.300 | 2.166 |
| Calcium | Ca (wt%) | 1.157 | 0.211 | 0.479 | 1.656 |
| Copper | Cu (ppm) | 11.192 | 5.363 | 6.037 | 47.779 |
| Iron | Fe (wt%) | 3.716 | 0.758 | 1.618 | 6.370 |
| Mercury | Hg (ppm) | 0.054 | 0.028 | 0.020 | 0.212 |
| Magnesium | Mg (wt%) | 0.437 | 0.092 | 0.163 | 0.654 |
| Manganese | Mn (ppm) | 1013.090 | 365.919 | 370.415 | 1857.840 |
| Sodium | Na (wt%) | 0.874 | 0.175 | 0.553 | 1.355 |
| Phosphorus | P (wt%) | 0.035 | 0.015 | 0.006 | 0.065 |
| Lead | Pb (ppm) | 24.531 | 8.740 | 9.441 | 46.936 |
| Selenium | Se (ppm) | 0.161 | 0.089 | 0.100 | 0.796 |
| Titanium | Ti (wt%) | 0.691 | 0.099 | 0.433 | 1.068 |
| Zinc | Zn (ppm) | 44.285 | 7.403 | 25.310 | 84.725 |