| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.420 | 0.713 | 1.856 | 5.282 |
| Arsenic | As (ppm) | 6.770 | 2.648 | 2.682 | 18.367 |
| Calcium | Ca (wt%) | 0.928 | 0.981 | 0.106 | 6.351 |
| Copper | Cu (ppm) | 5.219 | 2.432 | 1.001 | 9.985 |
| Iron | Fe (wt%) | 1.957 | 0.387 | 0.941 | 3.059 |
| Mercury | Hg (ppm) | 0.025 | 0.011 | 0.010 | 0.060 |
| Magnesium | Mg (wt%) | 0.283 | 0.111 | 0.096 | 0.649 |
| Manganese | Mn (ppm) | 295.797 | 111.621 | 90.073 | 759.649 |
| Sodium | Na (wt%) | 0.315 | 0.102 | 0.095 | 0.511 |
| Phosphorus | P (wt%) | 0.026 | 0.007 | 0.012 | 0.052 |
| Lead | Pb (ppm) | 16.572 | 1.956 | 10.363 | 23.911 |
| Selenium | Se (ppm) | 0.285 | 0.123 | 0.102 | 0.791 |
| Titanium | Ti (wt%) | 0.309 | 0.060 | 0.214 | 0.668 |
| Zinc | Zn (ppm) | 39.814 | 7.856 | 20.090 | 67.034 |