| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.048 | 1.113 | 4.653 | 8.893 |
| Arsenic | As (ppm) | 2.938 | 1.758 | 0.343 | 8.997 |
| Calcium | Ca (wt%) | 1.486 | 0.462 | 0.523 | 2.437 |
| Copper | Cu (ppm) | 16.278 | 6.886 | 4.157 | 30.994 |
| Iron | Fe (wt%) | 2.610 | 0.505 | 1.290 | 3.828 |
| Mercury | Hg (ppm) | 0.066 | 0.021 | 0.010 | 0.122 |
| Magnesium | Mg (wt%) | 0.582 | 0.169 | 0.223 | 1.611 |
| Manganese | Mn (ppm) | 782.576 | 260.987 | 297.534 | 1906.020 |
| Sodium | Na (wt%) | 1.706 | 0.560 | 0.826 | 2.609 |
| Phosphorus | P (wt%) | 0.079 | 0.031 | 0.025 | 0.162 |
| Lead | Pb (ppm) | 29.770 | 6.459 | 14.009 | 48.206 |
| Selenium | Se (ppm) | 0.205 | 0.116 | 0.100 | 0.842 |
| Titanium | Ti (wt%) | 0.352 | 0.066 | 0.165 | 0.506 |
| Zinc | Zn (ppm) | 59.929 | 11.270 | 24.011 | 81.677 |