| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.949 | 0.414 | 2.958 | 5.172 |
| Arsenic | As (ppm) | 7.731 | 2.902 | 2.908 | 18.150 |
| Calcium | Ca (wt%) | 0.320 | 0.090 | 0.178 | 0.692 |
| Copper | Cu (ppm) | 9.431 | 1.679 | 5.147 | 14.164 |
| Iron | Fe (wt%) | 1.374 | 0.175 | 0.879 | 1.825 |
| Mercury | Hg (ppm) | 0.037 | 0.013 | 0.010 | 0.091 |
| Magnesium | Mg (wt%) | 0.233 | 0.067 | 0.126 | 0.442 |
| Manganese | Mn (ppm) | 435.550 | 105.210 | 151.467 | 760.641 |
| Sodium | Na (wt%) | 0.659 | 0.096 | 0.458 | 0.899 |
| Phosphorus | P (wt%) | 0.035 | 0.006 | 0.016 | 0.057 |
| Lead | Pb (ppm) | 18.187 | 5.844 | 10.908 | 51.737 |
| Selenium | Se (ppm) | 0.241 | 0.061 | 0.107 | 0.485 |
| Titanium | Ti (wt%) | 0.275 | 0.016 | 0.212 | 0.313 |
| Zinc | Zn (ppm) | 39.700 | 6.885 | 21.986 | 54.869 |