| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.112 | 0.379 | 0.447 | 2.359 |
| Arsenic | As (ppm) | 4.706 | 3.516 | 2.169 | 24.192 |
| Calcium | Ca (wt%) | 0.077 | 0.039 | 0.027 | 0.218 |
| Copper | Cu (ppm) | 4.862 | 2.492 | 1.086 | 11.823 |
| Iron | Fe (wt%) | 2.518 | 1.628 | 0.797 | 8.136 |
| Mercury | Hg (ppm) | 0.059 | 0.012 | 0.030 | 0.096 |
| Magnesium | Mg (wt%) | 0.086 | 0.083 | 0.030 | 0.591 |
| Manganese | Mn (ppm) | 402.313 | 177.960 | 132.974 | 946.032 |
| Sodium | Na (wt%) | 0.103 | 0.079 | 0.024 | 0.372 |
| Phosphorus | P (wt%) | 0.019 | 0.024 | 0.003 | 0.137 |
| Lead | Pb (ppm) | 51.190 | 14.747 | 21.348 | 92.646 |
| Selenium | Se (ppm) | 0.472 | 0.240 | 0.132 | 1.269 |
| Titanium | Ti (wt%) | 0.955 | 0.228 | 0.613 | 1.723 |
| Zinc | Zn (ppm) | 36.879 | 13.462 | 14.172 | 100.772 |