| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.959 | 0.395 | 2.146 | 5.669 |
| Arsenic | As (ppm) | 10.881 | 2.166 | 4.410 | 14.690 |
| Calcium | Ca (wt%) | 0.626 | 0.491 | 0.068 | 2.258 |
| Copper | Cu (ppm) | 15.102 | 9.840 | 5.220 | 64.726 |
| Iron | Fe (wt%) | 2.564 | 0.367 | 1.218 | 3.541 |
| Mercury | Hg (ppm) | 0.013 | 0.005 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.513 | 0.170 | 0.189 | 1.058 |
| Manganese | Mn (ppm) | 662.782 | 130.222 | 296.746 | 1149.740 |
| Sodium | Na (wt%) | 0.569 | 0.138 | 0.221 | 0.835 |
| Phosphorus | P (wt%) | 0.052 | 0.008 | 0.026 | 0.080 |
| Lead | Pb (ppm) | 17.385 | 2.194 | 12.388 | 25.830 |
| Selenium | Se (ppm) | 0.144 | 0.034 | 0.100 | 0.298 |
| Titanium | Ti (wt%) | 0.335 | 0.093 | 0.140 | 0.671 |
| Zinc | Zn (ppm) | 64.251 | 11.147 | 29.520 | 101.221 |