| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.378 | 0.585 | 0.480 | 2.605 |
| Arsenic | As (ppm) | 6.946 | 3.277 | 2.334 | 19.427 |
| Calcium | Ca (wt%) | 0.110 | 0.085 | 0.016 | 0.526 |
| Copper | Cu (ppm) | 6.922 | 2.797 | 1.204 | 19.178 |
| Iron | Fe (wt%) | 2.679 | 1.464 | 0.739 | 7.292 |
| Mercury | Hg (ppm) | 0.065 | 0.011 | 0.031 | 0.096 |
| Magnesium | Mg (wt%) | 0.151 | 0.114 | 0.020 | 0.448 |
| Manganese | Mn (ppm) | 373.168 | 145.246 | 143.311 | 951.799 |
| Sodium | Na (wt%) | 0.097 | 0.070 | 0.016 | 0.322 |
| Phosphorus | P (wt%) | 0.051 | 0.051 | 0.003 | 0.271 |
| Lead | Pb (ppm) | 38.908 | 12.877 | 14.084 | 100.498 |
| Selenium | Se (ppm) | 0.307 | 0.139 | 0.102 | 0.713 |
| Titanium | Ti (wt%) | 1.032 | 0.214 | 0.558 | 1.828 |
| Zinc | Zn (ppm) | 46.249 | 16.909 | 22.011 | 99.192 |