| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.489 | 0.895 | 1.917 | 8.887 |
| Arsenic | As (ppm) | 12.579 | 1.723 | 4.888 | 17.264 |
| Calcium | Ca (wt%) | 0.583 | 0.096 | 0.193 | 0.734 |
| Copper | Cu (ppm) | 19.458 | 3.061 | 6.592 | 26.909 |
| Iron | Fe (wt%) | 2.957 | 0.437 | 1.224 | 4.326 |
| Mercury | Hg (ppm) | 0.047 | 0.010 | 0.018 | 0.105 |
| Magnesium | Mg (wt%) | 0.701 | 0.120 | 0.183 | 1.047 |
| Manganese | Mn (ppm) | 922.432 | 221.185 | 508.171 | 1885.760 |
| Sodium | Na (wt%) | 0.559 | 0.136 | 0.194 | 1.004 |
| Phosphorus | P (wt%) | 0.079 | 0.010 | 0.029 | 0.102 |
| Lead | Pb (ppm) | 24.944 | 3.684 | 10.850 | 36.942 |
| Selenium | Se (ppm) | 0.774 | 0.264 | 0.271 | 1.790 |
| Titanium | Ti (wt%) | 0.340 | 0.032 | 0.181 | 0.432 |
| Zinc | Zn (ppm) | 89.215 | 13.338 | 27.567 | 115.278 |