| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.551 | 0.830 | 1.415 | 6.041 |
| Arsenic | As (ppm) | 3.306 | 1.831 | 0.584 | 15.153 |
| Calcium | Ca (wt%) | 0.207 | 0.270 | 0.026 | 2.894 |
| Copper | Cu (ppm) | 9.014 | 2.978 | 3.276 | 19.671 |
| Iron | Fe (wt%) | 2.717 | 0.711 | 1.535 | 6.416 |
| Mercury | Hg (ppm) | 0.045 | 0.011 | 0.020 | 0.082 |
| Magnesium | Mg (wt%) | 0.305 | 0.181 | 0.075 | 2.102 |
| Manganese | Mn (ppm) | 556.671 | 210.182 | 191.615 | 1393.240 |
| Sodium | Na (wt%) | 0.276 | 0.107 | 0.048 | 0.545 |
| Phosphorus | P (wt%) | 0.018 | 0.008 | 0.004 | 0.047 |
| Lead | Pb (ppm) | 19.627 | 3.294 | 10.276 | 30.799 |
| Selenium | Se (ppm) | 0.273 | 0.076 | 0.101 | 0.696 |
| Titanium | Ti (wt%) | 0.481 | 0.136 | 0.263 | 0.915 |
| Zinc | Zn (ppm) | 46.626 | 9.686 | 21.704 | 83.165 |