| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.052 | 0.413 | 0.209 | 3.599 |
| Arsenic | As (ppm) | 2.577 | 0.940 | 1.015 | 7.364 |
| Calcium | Ca (wt%) | 0.045 | 0.018 | 0.009 | 0.103 |
| Copper | Cu (ppm) | 4.422 | 1.228 | 1.204 | 9.520 |
| Iron | Fe (wt%) | 0.488 | 0.154 | 0.115 | 1.258 |
| Mercury | Hg (ppm) | 0.106 | 0.126 | 0.025 | 0.949 |
| Magnesium | Mg (wt%) | 0.028 | 0.009 | 0.008 | 0.088 |
| Manganese | Mn (ppm) | 134.940 | 100.266 | 27.647 | 899.943 |
| Sodium | Na (wt%) | 0.021 | 0.015 | 0.006 | 0.105 |
| Phosphorus | P (wt%) | 0.025 | 0.008 | 0.008 | 0.065 |
| Lead | Pb (ppm) | 13.278 | 2.898 | 5.469 | 22.829 |
| Selenium | Se (ppm) | 0.232 | 0.069 | 0.107 | 0.701 |
| Titanium | Ti (wt%) | 0.501 | 0.074 | 0.277 | 0.754 |
| Zinc | Zn (ppm) | 15.333 | 4.529 | 6.227 | 48.755 |