| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.166 | 0.643 | 0.874 | 3.363 |
| Arsenic | As (ppm) | 4.390 | 1.810 | 1.064 | 9.138 |
| Calcium | Ca (wt%) | 1.244 | 1.178 | 0.091 | 5.571 |
| Copper | Cu (ppm) | 5.133 | 1.646 | 1.177 | 9.566 |
| Iron | Fe (wt%) | 1.066 | 0.456 | 0.280 | 2.083 |
| Mercury | Hg (ppm) | 0.010 | 0.001 | 0.010 | 0.018 |
| Magnesium | Mg (wt%) | 0.203 | 0.087 | 0.059 | 0.685 |
| Manganese | Mn (ppm) | 341.905 | 159.144 | 80.510 | 995.866 |
| Sodium | Na (wt%) | 0.237 | 0.093 | 0.067 | 0.780 |
| Phosphorus | P (wt%) | 0.017 | 0.007 | 0.005 | 0.034 |
| Lead | Pb (ppm) | 12.257 | 7.222 | 2.258 | 49.177 |
| Selenium | Se (ppm) | 0.130 | 0.038 | 0.100 | 0.286 |
| Titanium | Ti (wt%) | 0.199 | 0.078 | 0.067 | 0.532 |
| Zinc | Zn (ppm) | 18.283 | 7.714 | 5.657 | 41.735 |