| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.214 | 0.954 | 1.534 | 5.762 |
| Arsenic | As (ppm) | 6.874 | 2.519 | 3.018 | 12.891 |
| Calcium | Ca (wt%) | 18.709 | 5.767 | 4.421 | 28.232 |
| Copper | Cu (ppm) | 15.373 | 1.259 | 11.022 | 18.659 |
| Iron | Fe (wt%) | 1.439 | 0.441 | 0.727 | 2.618 |
| Mercury | Hg (ppm) | 0.027 | 0.008 | 0.010 | 0.041 |
| Magnesium | Mg (wt%) | 0.937 | 0.251 | 0.417 | 1.578 |
| Manganese | Mn (ppm) | 361.527 | 122.119 | 210.788 | 723.634 |
| Sodium | Na (wt%) | 0.110 | 0.025 | 0.055 | 0.155 |
| Phosphorus | P (wt%) | 0.039 | 0.015 | 0.020 | 0.081 |
| Lead | Pb (ppm) | 21.720 | 5.152 | 8.078 | 40.351 |
| Selenium | Se (ppm) | 0.493 | 0.077 | 0.348 | 0.693 |
| Titanium | Ti (wt%) | 0.175 | 0.048 | 0.090 | 0.308 |
| Zinc | Zn (ppm) | 46.035 | 22.894 | 19.860 | 102.884 |