| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.285 | 0.812 | 1.609 | 6.637 |
| Arsenic | As (ppm) | 9.573 | 2.507 | 2.973 | 20.939 |
| Calcium | Ca (wt%) | 14.337 | 3.799 | 3.442 | 25.502 |
| Copper | Cu (ppm) | 16.798 | 2.281 | 12.327 | 26.429 |
| Iron | Fe (wt%) | 2.008 | 0.395 | 0.762 | 3.235 |
| Mercury | Hg (ppm) | 0.030 | 0.010 | 0.011 | 0.065 |
| Magnesium | Mg (wt%) | 0.958 | 0.477 | 0.448 | 3.013 |
| Manganese | Mn (ppm) | 446.825 | 108.401 | 187.680 | 945.758 |
| Sodium | Na (wt%) | 0.087 | 0.010 | 0.060 | 0.127 |
| Phosphorus | P (wt%) | 0.060 | 0.022 | 0.026 | 0.130 |
| Lead | Pb (ppm) | 28.526 | 9.447 | 8.513 | 89.941 |
| Selenium | Se (ppm) | 0.587 | 0.109 | 0.305 | 1.256 |
| Titanium | Ti (wt%) | 0.231 | 0.047 | 0.084 | 0.423 |
| Zinc | Zn (ppm) | 55.787 | 18.791 | 20.802 | 163.627 |