| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.309 | 0.859 | 1.524 | 6.291 |
| Arsenic | As (ppm) | 6.037 | 1.795 | 2.764 | 11.758 |
| Calcium | Ca (wt%) | 0.594 | 0.145 | 0.225 | 0.983 |
| Copper | Cu (ppm) | 17.245 | 4.410 | 4.504 | 28.780 |
| Iron | Fe (wt%) | 2.037 | 0.481 | 0.854 | 3.183 |
| Mercury | Hg (ppm) | 0.082 | 0.022 | 0.024 | 0.169 |
| Magnesium | Mg (wt%) | 0.757 | 0.216 | 0.187 | 1.205 |
| Manganese | Mn (ppm) | 465.782 | 228.177 | 153.843 | 1292.400 |
| Sodium | Na (wt%) | 1.060 | 0.357 | 0.353 | 1.974 |
| Phosphorus | P (wt%) | 0.062 | 0.017 | 0.022 | 0.104 |
| Lead | Pb (ppm) | 25.088 | 11.228 | 8.555 | 104.790 |
| Selenium | Se (ppm) | 0.743 | 0.239 | 0.193 | 1.493 |
| Titanium | Ti (wt%) | 0.216 | 0.042 | 0.065 | 0.461 |
| Zinc | Zn (ppm) | 59.892 | 13.653 | 24.775 | 89.261 |