| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.849 | 0.415 | 3.937 | 5.916 |
| Arsenic | As (ppm) | 11.146 | 1.053 | 8.674 | 13.600 |
| Calcium | Ca (wt%) | 0.423 | 0.185 | 0.169 | 1.171 |
| Copper | Cu (ppm) | 15.957 | 3.727 | 8.030 | 29.276 |
| Iron | Fe (wt%) | 3.000 | 0.340 | 2.394 | 4.718 |
| Mercury | Hg (ppm) | 0.044 | 0.008 | 0.029 | 0.066 |
| Magnesium | Mg (wt%) | 0.394 | 0.050 | 0.314 | 0.625 |
| Manganese | Mn (ppm) | 868.068 | 267.441 | 350.026 | 2080.850 |
| Sodium | Na (wt%) | 0.481 | 0.032 | 0.383 | 0.551 |
| Phosphorus | P (wt%) | 0.062 | 0.016 | 0.038 | 0.124 |
| Lead | Pb (ppm) | 44.501 | 27.724 | 20.478 | 157.558 |
| Selenium | Se (ppm) | 0.445 | 0.066 | 0.299 | 0.599 |
| Titanium | Ti (wt%) | 0.328 | 0.038 | 0.205 | 0.435 |
| Zinc | Zn (ppm) | 113.228 | 46.524 | 70.893 | 281.507 |