| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.691 | 0.580 | 5.158 | 7.712 |
| Arsenic | As (ppm) | 6.955 | 2.690 | 2.209 | 23.965 |
| Calcium | Ca (wt%) | 2.556 | 1.177 | 0.718 | 9.562 |
| Copper | Cu (ppm) | 22.482 | 8.650 | 4.582 | 56.650 |
| Iron | Fe (wt%) | 2.818 | 0.851 | 0.613 | 7.555 |
| Mercury | Hg (ppm) | 0.087 | 0.072 | 0.011 | 0.456 |
| Magnesium | Mg (wt%) | 0.849 | 0.395 | 0.095 | 2.438 |
| Manganese | Mn (ppm) | 554.910 | 149.739 | 163.031 | 1352.630 |
| Sodium | Na (wt%) | 1.866 | 0.187 | 1.312 | 2.394 |
| Phosphorus | P (wt%) | 0.121 | 0.144 | 0.021 | 1.167 |
| Lead | Pb (ppm) | 15.447 | 4.231 | 7.082 | 36.813 |
| Selenium | Se (ppm) | 0.533 | 0.453 | 0.101 | 3.159 |
| Titanium | Ti (wt%) | 0.380 | 0.113 | 0.215 | 1.260 |
| Zinc | Zn (ppm) | 58.752 | 16.485 | 11.726 | 138.113 |