| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.473 | 0.974 | 1.710 | 6.983 |
| Arsenic | As (ppm) | 7.387 | 6.154 | 1.401 | 39.914 |
| Calcium | Ca (wt%) | 0.751 | 0.452 | 0.162 | 1.754 |
| Copper | Cu (ppm) | 14.996 | 8.648 | 4.144 | 36.406 |
| Iron | Fe (wt%) | 5.087 | 1.971 | 1.852 | 14.023 |
| Mercury | Hg (ppm) | 0.157 | 0.076 | 0.055 | 0.534 |
| Magnesium | Mg (wt%) | 0.606 | 0.434 | 0.147 | 1.535 |
| Manganese | Mn (ppm) | 1138.870 | 548.799 | 352.976 | 3571.950 |
| Sodium | Na (wt%) | 0.623 | 0.134 | 0.217 | 1.212 |
| Phosphorus | P (wt%) | 0.045 | 0.017 | 0.005 | 0.087 |
| Lead | Pb (ppm) | 48.780 | 17.133 | 21.333 | 111.914 |
| Selenium | Se (ppm) | 0.459 | 0.172 | 0.120 | 1.281 |
| Titanium | Ti (wt%) | 0.952 | 0.248 | 0.475 | 1.737 |
| Zinc | Zn (ppm) | 89.395 | 27.561 | 34.157 | 174.528 |