| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.130 | 0.392 | 3.266 | 5.343 |
| Arsenic | As (ppm) | 4.054 | 0.583 | 2.305 | 5.986 |
| Calcium | Ca (wt%) | 2.411 | 0.897 | 0.792 | 5.499 |
| Copper | Cu (ppm) | 9.568 | 1.747 | 3.753 | 12.518 |
| Iron | Fe (wt%) | 1.839 | 0.203 | 1.343 | 3.038 |
| Mercury | Hg (ppm) | 0.018 | 0.011 | 0.010 | 0.069 |
| Magnesium | Mg (wt%) | 0.457 | 0.111 | 0.316 | 1.038 |
| Manganese | Mn (ppm) | 326.619 | 37.503 | 232.257 | 505.670 |
| Sodium | Na (wt%) | 0.583 | 0.029 | 0.473 | 0.687 |
| Phosphorus | P (wt%) | 0.032 | 0.005 | 0.020 | 0.043 |
| Lead | Pb (ppm) | 17.739 | 1.093 | 15.604 | 21.855 |
| Selenium | Se (ppm) | 0.209 | 0.051 | 0.102 | 0.391 |
| Titanium | Ti (wt%) | 0.229 | 0.024 | 0.174 | 0.309 |
| Zinc | Zn (ppm) | 40.613 | 7.005 | 28.767 | 65.544 |