| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.456 | 0.676 | 1.632 | 4.662 |
| Arsenic | As (ppm) | 5.528 | 2.416 | 1.880 | 12.573 |
| Calcium | Ca (wt%) | 1.181 | 0.582 | 0.179 | 2.386 |
| Copper | Cu (ppm) | 8.131 | 1.676 | 4.331 | 12.922 |
| Iron | Fe (wt%) | 1.584 | 0.425 | 0.681 | 2.821 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.025 |
| Magnesium | Mg (wt%) | 0.358 | 0.088 | 0.128 | 0.602 |
| Manganese | Mn (ppm) | 570.946 | 549.294 | 96.034 | 2743.360 |
| Sodium | Na (wt%) | 0.312 | 0.073 | 0.164 | 0.485 |
| Phosphorus | P (wt%) | 0.026 | 0.007 | 0.012 | 0.050 |
| Lead | Pb (ppm) | 19.768 | 10.370 | 9.612 | 71.240 |
| Selenium | Se (ppm) | 0.158 | 0.054 | 0.100 | 0.547 |
| Titanium | Ti (wt%) | 0.230 | 0.026 | 0.151 | 0.288 |
| Zinc | Zn (ppm) | 29.948 | 5.292 | 14.774 | 41.308 |