| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.211 | 0.341 | 0.522 | 2.188 |
| Arsenic | As (ppm) | 1.240 | 0.374 | 0.817 | 2.236 |
| Calcium | Ca (wt%) | 0.037 | 0.009 | 0.023 | 0.091 |
| Copper | Cu (ppm) | 3.543 | 0.443 | 2.204 | 4.639 |
| Iron | Fe (wt%) | 0.770 | 0.123 | 0.499 | 1.198 |
| Mercury | Hg (ppm) | 0.036 | 0.016 | 0.010 | 0.069 |
| Magnesium | Mg (wt%) | 0.023 | 0.006 | 0.010 | 0.051 |
| Manganese | Mn (ppm) | 240.277 | 180.237 | 78.230 | 964.810 |
| Sodium | Na (wt%) | 0.027 | 0.010 | 0.008 | 0.087 |
| Phosphorus | P (wt%) | 0.015 | 0.003 | 0.010 | 0.023 |
| Lead | Pb (ppm) | 16.274 | 1.503 | 11.147 | 22.245 |
| Selenium | Se (ppm) | 0.117 | 0.021 | 0.100 | 0.220 |
| Titanium | Ti (wt%) | 0.409 | 0.051 | 0.253 | 0.528 |
| Zinc | Zn (ppm) | 15.352 | 2.392 | 10.884 | 20.513 |