| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.274 | 0.520 | 2.263 | 4.459 |
| Arsenic | As (ppm) | 5.605 | 1.063 | 3.220 | 8.822 |
| Calcium | Ca (wt%) | 0.673 | 0.540 | 0.070 | 2.801 |
| Copper | Cu (ppm) | 9.256 | 2.845 | 5.063 | 18.294 |
| Iron | Fe (wt%) | 2.327 | 0.393 | 1.577 | 3.327 |
| Mercury | Hg (ppm) | 0.055 | 0.011 | 0.031 | 0.089 |
| Magnesium | Mg (wt%) | 0.370 | 0.055 | 0.182 | 0.508 |
| Manganese | Mn (ppm) | 611.633 | 300.412 | 159.228 | 1819.550 |
| Sodium | Na (wt%) | 0.144 | 0.029 | 0.062 | 0.230 |
| Phosphorus | P (wt%) | 0.036 | 0.005 | 0.021 | 0.050 |
| Lead | Pb (ppm) | 23.663 | 6.521 | 13.741 | 39.931 |
| Selenium | Se (ppm) | 0.266 | 0.080 | 0.103 | 0.576 |
| Titanium | Ti (wt%) | 0.263 | 0.016 | 0.209 | 0.335 |
| Zinc | Zn (ppm) | 79.717 | 26.020 | 47.251 | 167.440 |