| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.525 | 0.679 | 0.359 | 3.487 |
| Arsenic | As (ppm) | 2.337 | 0.659 | 0.570 | 4.963 |
| Calcium | Ca (wt%) | 0.033 | 0.014 | 0.012 | 0.105 |
| Copper | Cu (ppm) | 4.588 | 1.295 | 2.251 | 9.508 |
| Iron | Fe (wt%) | 1.083 | 0.220 | 0.568 | 1.813 |
| Mercury | Hg (ppm) | 0.033 | 0.011 | 0.011 | 0.058 |
| Magnesium | Mg (wt%) | 0.031 | 0.015 | 0.010 | 0.085 |
| Manganese | Mn (ppm) | 244.724 | 49.277 | 120.799 | 396.932 |
| Sodium | Na (wt%) | 0.014 | 0.018 | 0.003 | 0.133 |
| Phosphorus | P (wt%) | 0.030 | 0.015 | 0.011 | 0.091 |
| Lead | Pb (ppm) | 20.097 | 3.023 | 15.608 | 30.932 |
| Selenium | Se (ppm) | 0.277 | 0.134 | 0.106 | 0.760 |
| Titanium | Ti (wt%) | 0.523 | 0.051 | 0.391 | 0.678 |
| Zinc | Zn (ppm) | 22.168 | 3.250 | 16.226 | 34.722 |