| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.406 | 0.920 | 3.159 | 6.106 |
| Arsenic | As (ppm) | 4.526 | 1.680 | 1.824 | 9.378 |
| Calcium | Ca (wt%) | 2.191 | 0.828 | 0.770 | 4.272 |
| Copper | Cu (ppm) | 8.684 | 2.659 | 2.194 | 13.786 |
| Iron | Fe (wt%) | 2.578 | 0.558 | 1.739 | 3.828 |
| Mercury | Hg (ppm) | 0.054 | 0.013 | 0.022 | 0.099 |
| Magnesium | Mg (wt%) | 0.896 | 0.145 | 0.528 | 1.319 |
| Manganese | Mn (ppm) | 608.242 | 60.693 | 418.039 | 753.883 |
| Sodium | Na (wt%) | 0.811 | 0.056 | 0.683 | 0.915 |
| Phosphorus | P (wt%) | 0.056 | 0.004 | 0.046 | 0.074 |
| Lead | Pb (ppm) | 21.110 | 4.043 | 13.454 | 29.551 |
| Selenium | Se (ppm) | 0.238 | 0.073 | 0.109 | 0.477 |
| Titanium | Ti (wt%) | 0.358 | 0.036 | 0.250 | 0.414 |
| Zinc | Zn (ppm) | 58.913 | 17.167 | 34.315 | 87.636 |