| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.566 | 1.206 | 1.008 | 7.602 |
| Arsenic | As (ppm) | 2.751 | 1.149 | 1.445 | 8.087 |
| Calcium | Ca (wt%) | 0.085 | 0.027 | 0.044 | 0.183 |
| Copper | Cu (ppm) | 6.625 | 2.124 | 3.262 | 15.299 |
| Iron | Fe (wt%) | 0.874 | 0.374 | 0.468 | 2.385 |
| Mercury | Hg (ppm) | 0.024 | 0.007 | 0.011 | 0.058 |
| Magnesium | Mg (wt%) | 0.057 | 0.018 | 0.033 | 0.144 |
| Manganese | Mn (ppm) | 350.861 | 89.590 | 134.763 | 635.509 |
| Sodium | Na (wt%) | 0.010 | 0.002 | 0.003 | 0.019 |
| Phosphorus | P (wt%) | 0.035 | 0.012 | 0.017 | 0.104 |
| Lead | Pb (ppm) | 18.552 | 4.331 | 12.216 | 44.967 |
| Selenium | Se (ppm) | 0.260 | 0.122 | 0.113 | 0.763 |
| Titanium | Ti (wt%) | 0.419 | 0.063 | 0.299 | 0.820 |
| Zinc | Zn (ppm) | 23.007 | 6.411 | 11.663 | 59.242 |