| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.227 | 0.695 | 3.001 | 6.659 |
| Arsenic | As (ppm) | 8.568 | 2.882 | 4.049 | 17.985 |
| Calcium | Ca (wt%) | 2.240 | 1.908 | 0.337 | 9.354 |
| Copper | Cu (ppm) | 26.921 | 6.484 | 9.940 | 47.977 |
| Iron | Fe (wt%) | 2.208 | 1.034 | 1.092 | 7.051 |
| Mercury | Hg (ppm) | 0.049 | 0.024 | 0.018 | 0.139 |
| Magnesium | Mg (wt%) | 0.845 | 0.459 | 0.268 | 2.219 |
| Manganese | Mn (ppm) | 538.184 | 234.735 | 285.286 | 1623.920 |
| Sodium | Na (wt%) | 0.627 | 0.231 | 0.193 | 1.346 |
| Phosphorus | P (wt%) | 0.098 | 0.015 | 0.064 | 0.153 |
| Lead | Pb (ppm) | 439.019 | 620.257 | 13.156 | 3167.260 |
| Selenium | Se (ppm) | 0.313 | 0.108 | 0.105 | 0.786 |
| Titanium | Ti (wt%) | 0.261 | 0.093 | 0.160 | 0.645 |
| Zinc | Zn (ppm) | 85.387 | 13.085 | 60.199 | 128.347 |