| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.129 | 0.827 | 1.227 | 5.531 |
| Arsenic | As (ppm) | 10.759 | 4.126 | 2.174 | 23.873 |
| Calcium | Ca (wt%) | 0.768 | 0.791 | 0.071 | 3.554 |
| Copper | Cu (ppm) | 5.680 | 2.443 | 1.473 | 17.497 |
| Iron | Fe (wt%) | 2.649 | 0.741 | 0.945 | 4.955 |
| Mercury | Hg (ppm) | 0.018 | 0.006 | 0.010 | 0.036 |
| Magnesium | Mg (wt%) | 0.203 | 0.065 | 0.065 | 0.475 |
| Manganese | Mn (ppm) | 967.524 | 472.659 | 246.139 | 2771.910 |
| Sodium | Na (wt%) | 0.157 | 0.032 | 0.066 | 0.301 |
| Phosphorus | P (wt%) | 0.060 | 0.031 | 0.016 | 0.183 |
| Lead | Pb (ppm) | 26.613 | 8.544 | 11.728 | 47.773 |
| Selenium | Se (ppm) | 0.437 | 0.130 | 0.113 | 0.955 |
| Titanium | Ti (wt%) | 0.502 | 0.105 | 0.213 | 0.963 |
| Zinc | Zn (ppm) | 45.076 | 12.404 | 25.333 | 88.165 |