| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.524 | 0.318 | 0.040 | 2.197 |
| Arsenic | As (ppm) | 1.788 | 1.265 | 0.304 | 7.416 |
| Calcium | Ca (wt%) | 0.895 | 0.683 | 0.035 | 4.579 |
| Copper | Cu (ppm) | 41.051 | 88.971 | 1.006 | 555.304 |
| Iron | Fe (wt%) | 0.519 | 0.650 | 0.014 | 5.908 |
| Mercury | Hg (ppm) | 0.018 | 0.016 | 0.010 | 0.111 |
| Magnesium | Mg (wt%) | 0.037 | 0.023 | 0.003 | 0.115 |
| Manganese | Mn (ppm) | 195.788 | 298.882 | 3.437 | 2345.820 |
| Sodium | Na (wt%) | 0.043 | 0.019 | 0.005 | 0.113 |
| Phosphorus | P (wt%) | 0.037 | 0.031 | 0.003 | 0.210 |
| Lead | Pb (ppm) | 14.838 | 11.761 | 2.124 | 61.819 |
| Selenium | Se (ppm) | 0.144 | 0.046 | 0.100 | 0.343 |
| Titanium | Ti (wt%) | 0.355 | 0.168 | 0.052 | 1.434 |
| Zinc | Zn (ppm) | 21.186 | 29.468 | 1.947 | 175.338 |