| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.369 | 0.516 | 1.901 | 4.749 |
| Arsenic | As (ppm) | 6.171 | 1.139 | 3.309 | 9.489 |
| Calcium | Ca (wt%) | 0.146 | 0.039 | 0.072 | 0.227 |
| Copper | Cu (ppm) | 9.573 | 4.114 | 2.095 | 22.231 |
| Iron | Fe (wt%) | 1.965 | 0.237 | 1.203 | 2.558 |
| Mercury | Hg (ppm) | 0.051 | 0.011 | 0.023 | 0.093 |
| Magnesium | Mg (wt%) | 0.309 | 0.045 | 0.165 | 0.410 |
| Manganese | Mn (ppm) | 1130.470 | 437.330 | 204.788 | 2806.910 |
| Sodium | Na (wt%) | 0.520 | 0.220 | 0.116 | 0.815 |
| Phosphorus | P (wt%) | 0.052 | 0.014 | 0.026 | 0.087 |
| Lead | Pb (ppm) | 41.667 | 23.197 | 16.326 | 127.392 |
| Selenium | Se (ppm) | 0.239 | 0.069 | 0.108 | 0.558 |
| Titanium | Ti (wt%) | 0.328 | 0.083 | 0.180 | 0.507 |
| Zinc | Zn (ppm) | 78.936 | 17.784 | 52.898 | 137.502 |