| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.671 | 0.761 | 2.811 | 7.672 |
| Arsenic | As (ppm) | 5.702 | 1.612 | 2.301 | 20.311 |
| Calcium | Ca (wt%) | 3.370 | 1.154 | 1.315 | 10.314 |
| Copper | Cu (ppm) | 20.517 | 6.629 | 2.859 | 66.592 |
| Iron | Fe (wt%) | 3.329 | 0.831 | 0.862 | 7.915 |
| Mercury | Hg (ppm) | 0.022 | 0.010 | 0.010 | 0.059 |
| Magnesium | Mg (wt%) | 1.125 | 0.189 | 0.197 | 1.771 |
| Manganese | Mn (ppm) | 598.641 | 156.469 | 130.440 | 1348.210 |
| Sodium | Na (wt%) | 1.216 | 0.275 | 0.638 | 2.053 |
| Phosphorus | P (wt%) | 0.075 | 0.027 | 0.026 | 0.154 |
| Lead | Pb (ppm) | 24.218 | 17.622 | 11.817 | 210.573 |
| Selenium | Se (ppm) | 0.168 | 0.054 | 0.100 | 0.657 |
| Titanium | Ti (wt%) | 0.431 | 0.113 | 0.100 | 1.145 |
| Zinc | Zn (ppm) | 65.975 | 15.038 | 18.485 | 148.481 |