| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.508 | 1.406 | 0.484 | 6.388 |
| Arsenic | As (ppm) | 6.594 | 3.533 | 2.065 | 23.932 |
| Calcium | Ca (wt%) | 0.266 | 0.254 | 0.033 | 1.538 |
| Copper | Cu (ppm) | 5.916 | 2.972 | 1.125 | 20.312 |
| Iron | Fe (wt%) | 1.345 | 0.680 | 0.371 | 5.078 |
| Mercury | Hg (ppm) | 0.016 | 0.007 | 0.010 | 0.058 |
| Magnesium | Mg (wt%) | 0.181 | 0.132 | 0.023 | 0.568 |
| Manganese | Mn (ppm) | 491.492 | 262.546 | 131.375 | 1756.830 |
| Sodium | Na (wt%) | 0.342 | 0.208 | 0.056 | 0.940 |
| Phosphorus | P (wt%) | 0.032 | 0.017 | 0.008 | 0.139 |
| Lead | Pb (ppm) | 17.403 | 4.160 | 9.880 | 43.080 |
| Selenium | Se (ppm) | 0.205 | 0.118 | 0.100 | 0.809 |
| Titanium | Ti (wt%) | 0.357 | 0.073 | 0.124 | 0.539 |
| Zinc | Zn (ppm) | 31.071 | 16.836 | 9.357 | 97.790 |