| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.873 | 1.039 | 1.310 | 5.696 |
| Arsenic | As (ppm) | 1.097 | 0.277 | 0.343 | 1.630 |
| Calcium | Ca (wt%) | 0.314 | 0.188 | 0.021 | 1.143 |
| Copper | Cu (ppm) | 7.098 | 2.042 | 2.096 | 11.839 |
| Iron | Fe (wt%) | 2.971 | 1.107 | 1.280 | 6.924 |
| Mercury | Hg (ppm) | 0.080 | 0.096 | 0.013 | 0.682 |
| Magnesium | Mg (wt%) | 0.176 | 0.068 | 0.036 | 0.424 |
| Manganese | Mn (ppm) | 1107.130 | 360.955 | 265.568 | 2373.060 |
| Sodium | Na (wt%) | 0.240 | 0.080 | 0.042 | 0.496 |
| Phosphorus | P (wt%) | 0.050 | 0.023 | 0.008 | 0.136 |
| Lead | Pb (ppm) | 37.846 | 9.535 | 11.075 | 68.513 |
| Selenium | Se (ppm) | 0.162 | 0.051 | 0.100 | 0.295 |
| Titanium | Ti (wt%) | 0.902 | 0.260 | 0.406 | 1.491 |
| Zinc | Zn (ppm) | 40.709 | 6.193 | 30.230 | 62.116 |