| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.464 | 0.554 | 2.152 | 4.836 |
| Arsenic | As (ppm) | 6.872 | 2.816 | 1.970 | 14.608 |
| Calcium | Ca (wt%) | 2.042 | 1.663 | 0.305 | 8.232 |
| Copper | Cu (ppm) | 7.522 | 1.558 | 3.305 | 11.957 |
| Iron | Fe (wt%) | 1.499 | 0.418 | 0.563 | 2.910 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 0.298 | 0.086 | 0.088 | 0.527 |
| Manganese | Mn (ppm) | 574.698 | 302.736 | 87.528 | 1281.850 |
| Sodium | Na (wt%) | 0.328 | 0.027 | 0.266 | 0.394 |
| Phosphorus | P (wt%) | 0.030 | 0.010 | 0.011 | 0.054 |
| Lead | Pb (ppm) | 22.235 | 6.553 | 11.629 | 57.347 |
| Selenium | Se (ppm) | 0.288 | 0.113 | 0.103 | 0.693 |
| Titanium | Ti (wt%) | 0.229 | 0.030 | 0.164 | 0.288 |
| Zinc | Zn (ppm) | 33.788 | 10.938 | 12.182 | 68.565 |