| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.205 | 0.485 | 0.523 | 2.378 |
| Arsenic | As (ppm) | 3.669 | 1.486 | 0.550 | 6.871 |
| Calcium | Ca (wt%) | 0.317 | 0.210 | 0.036 | 0.842 |
| Copper | Cu (ppm) | 10.687 | 6.151 | 1.571 | 26.136 |
| Iron | Fe (wt%) | 0.802 | 0.157 | 0.581 | 1.181 |
| Mercury | Hg (ppm) | 0.518 | 0.356 | 0.052 | 1.455 |
| Magnesium | Mg (wt%) | 0.057 | 0.030 | 0.017 | 0.132 |
| Manganese | Mn (ppm) | 191.372 | 17.127 | 158.606 | 258.548 |
| Sodium | Na (wt%) | 0.077 | 0.034 | 0.055 | 0.237 |
| Phosphorus | P (wt%) | 0.037 | 0.024 | 0.004 | 0.100 |
| Lead | Pb (ppm) | 82.447 | 55.460 | 9.316 | 228.040 |
| Selenium | Se (ppm) | 0.388 | 0.209 | 0.101 | 0.934 |
| Titanium | Ti (wt%) | 0.629 | 0.080 | 0.476 | 0.865 |
| Zinc | Zn (ppm) | 65.736 | 41.438 | 10.240 | 174.548 |