| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.723 | 0.756 | 0.502 | 4.690 |
| Arsenic | As (ppm) | 5.295 | 3.809 | 1.314 | 26.130 |
| Calcium | Ca (wt%) | 0.069 | 0.092 | 0.009 | 0.485 |
| Copper | Cu (ppm) | 4.337 | 1.418 | 1.133 | 9.639 |
| Iron | Fe (wt%) | 1.289 | 0.405 | 0.460 | 2.732 |
| Mercury | Hg (ppm) | 0.027 | 0.024 | 0.010 | 0.149 |
| Magnesium | Mg (wt%) | 0.035 | 0.021 | 0.009 | 0.127 |
| Manganese | Mn (ppm) | 144.025 | 68.166 | 50.646 | 490.196 |
| Sodium | Na (wt%) | 0.041 | 0.055 | 0.003 | 0.290 |
| Phosphorus | P (wt%) | 0.018 | 0.004 | 0.007 | 0.034 |
| Lead | Pb (ppm) | 18.234 | 4.605 | 9.585 | 35.364 |
| Selenium | Se (ppm) | 0.304 | 0.175 | 0.111 | 1.045 |
| Titanium | Ti (wt%) | 0.493 | 0.076 | 0.319 | 0.694 |
| Zinc | Zn (ppm) | 10.812 | 2.718 | 3.216 | 18.418 |