| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.288 | 0.172 | 0.025 | 1.060 |
| Arsenic | As (ppm) | 1.234 | 0.902 | 0.309 | 8.495 |
| Calcium | Ca (wt%) | 0.422 | 0.634 | 0.028 | 6.144 |
| Copper | Cu (ppm) | 4.847 | 3.753 | 1.041 | 25.010 |
| Iron | Fe (wt%) | 0.102 | 0.065 | 0.004 | 0.369 |
| Mercury | Hg (ppm) | 0.018 | 0.011 | 0.010 | 0.075 |
| Magnesium | Mg (wt%) | 0.018 | 0.011 | 0.003 | 0.077 |
| Manganese | Mn (ppm) | 18.579 | 10.077 | 2.256 | 75.314 |
| Sodium | Na (wt%) | 0.006 | 0.004 | 0.003 | 0.027 |
| Phosphorus | P (wt%) | 0.069 | 0.084 | 0.003 | 0.822 |
| Lead | Pb (ppm) | 11.957 | 11.370 | 2.509 | 114.756 |
| Selenium | Se (ppm) | 0.168 | 0.067 | 0.101 | 0.539 |
| Titanium | Ti (wt%) | 0.172 | 0.047 | 0.038 | 0.383 |
| Zinc | Zn (ppm) | 16.358 | 25.373 | 1.230 | 254.247 |