| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.190 | 0.474 | 0.244 | 2.056 |
| Arsenic | As (ppm) | 2.245 | 0.443 | 1.249 | 3.671 |
| Calcium | Ca (wt%) | 0.048 | 0.027 | 0.012 | 0.118 |
| Copper | Cu (ppm) | 3.627 | 1.154 | 1.014 | 6.130 |
| Iron | Fe (wt%) | 1.470 | 0.764 | 0.374 | 3.642 |
| Mercury | Hg (ppm) | 0.027 | 0.002 | 0.022 | 0.031 |
| Magnesium | Mg (wt%) | 0.028 | 0.007 | 0.010 | 0.041 |
| Manganese | Mn (ppm) | 314.629 | 104.045 | 148.588 | 615.535 |
| Sodium | Na (wt%) | 0.068 | 0.059 | 0.009 | 0.214 |
| Phosphorus | P (wt%) | 0.020 | 0.010 | 0.003 | 0.040 |
| Lead | Pb (ppm) | 18.181 | 3.800 | 9.311 | 26.633 |
| Selenium | Se (ppm) | 0.194 | 0.074 | 0.101 | 0.458 |
| Titanium | Ti (wt%) | 0.552 | 0.051 | 0.416 | 0.649 |
| Zinc | Zn (ppm) | 20.906 | 5.232 | 13.034 | 35.627 |