| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.564 | 0.662 | 1.677 | 6.207 |
| Arsenic | As (ppm) | 8.142 | 1.622 | 2.872 | 13.139 |
| Calcium | Ca (wt%) | 0.898 | 1.050 | 0.133 | 8.549 |
| Copper | Cu (ppm) | 12.124 | 3.056 | 3.279 | 21.281 |
| Iron | Fe (wt%) | 2.660 | 0.502 | 0.970 | 4.195 |
| Mercury | Hg (ppm) | 0.052 | 0.014 | 0.021 | 0.112 |
| Magnesium | Mg (wt%) | 0.619 | 0.497 | 0.152 | 4.331 |
| Manganese | Mn (ppm) | 695.843 | 167.191 | 190.687 | 1112.390 |
| Sodium | Na (wt%) | 0.151 | 0.037 | 0.052 | 0.283 |
| Phosphorus | P (wt%) | 0.035 | 0.007 | 0.014 | 0.059 |
| Lead | Pb (ppm) | 32.198 | 12.739 | 8.614 | 102.947 |
| Selenium | Se (ppm) | 0.277 | 0.067 | 0.106 | 0.397 |
| Titanium | Ti (wt%) | 0.261 | 0.040 | 0.096 | 0.339 |
| Zinc | Zn (ppm) | 91.488 | 42.778 | 18.210 | 358.691 |