| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.525 | 0.564 | 2.238 | 5.678 |
| Arsenic | As (ppm) | 6.096 | 1.499 | 2.921 | 11.999 |
| Calcium | Ca (wt%) | 1.678 | 2.559 | 0.246 | 14.799 |
| Copper | Cu (ppm) | 11.137 | 2.428 | 4.035 | 19.333 |
| Iron | Fe (wt%) | 1.886 | 0.238 | 1.102 | 3.119 |
| Mercury | Hg (ppm) | 0.034 | 0.015 | 0.011 | 0.070 |
| Magnesium | Mg (wt%) | 0.292 | 0.081 | 0.117 | 0.644 |
| Manganese | Mn (ppm) | 217.313 | 40.267 | 105.242 | 350.986 |
| Sodium | Na (wt%) | 0.149 | 0.024 | 0.082 | 0.222 |
| Phosphorus | P (wt%) | 0.035 | 0.008 | 0.020 | 0.064 |
| Lead | Pb (ppm) | 19.123 | 4.447 | 9.304 | 41.374 |
| Selenium | Se (ppm) | 0.277 | 0.084 | 0.119 | 0.496 |
| Titanium | Ti (wt%) | 0.263 | 0.027 | 0.211 | 0.340 |
| Zinc | Zn (ppm) | 52.886 | 8.037 | 31.866 | 87.832 |