| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.577 | 0.548 | 0.977 | 4.974 |
| Arsenic | As (ppm) | 3.880 | 0.816 | 2.002 | 6.776 |
| Calcium | Ca (wt%) | 0.226 | 0.289 | 0.037 | 1.860 |
| Copper | Cu (ppm) | 5.737 | 1.899 | 3.302 | 19.303 |
| Iron | Fe (wt%) | 1.449 | 0.342 | 0.575 | 2.844 |
| Mercury | Hg (ppm) | 0.027 | 0.012 | 0.011 | 0.077 |
| Magnesium | Mg (wt%) | 0.191 | 0.055 | 0.055 | 0.522 |
| Manganese | Mn (ppm) | 417.102 | 268.690 | 79.796 | 1540.120 |
| Sodium | Na (wt%) | 0.364 | 0.132 | 0.067 | 0.745 |
| Phosphorus | P (wt%) | 0.019 | 0.005 | 0.008 | 0.037 |
| Lead | Pb (ppm) | 17.384 | 3.880 | 9.698 | 55.260 |
| Selenium | Se (ppm) | 0.237 | 0.070 | 0.101 | 0.612 |
| Titanium | Ti (wt%) | 0.174 | 0.018 | 0.113 | 0.268 |
| Zinc | Zn (ppm) | 39.008 | 22.358 | 9.411 | 152.073 |