| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.895 | 1.015 | 0.361 | 6.383 |
| Arsenic | As (ppm) | 7.756 | 6.999 | 1.255 | 52.331 |
| Calcium | Ca (wt%) | 0.347 | 0.521 | 0.015 | 3.344 |
| Copper | Cu (ppm) | 5.158 | 3.574 | 1.210 | 27.868 |
| Iron | Fe (wt%) | 1.939 | 1.322 | 0.372 | 9.473 |
| Mercury | Hg (ppm) | 0.016 | 0.009 | 0.010 | 0.076 |
| Magnesium | Mg (wt%) | 0.148 | 0.102 | 0.017 | 0.576 |
| Manganese | Mn (ppm) | 607.813 | 413.593 | 134.278 | 2242.670 |
| Sodium | Na (wt%) | 0.085 | 0.036 | 0.013 | 0.283 |
| Phosphorus | P (wt%) | 0.036 | 0.032 | 0.005 | 0.250 |
| Lead | Pb (ppm) | 25.410 | 6.848 | 4.257 | 54.788 |
| Selenium | Se (ppm) | 0.317 | 0.211 | 0.101 | 1.372 |
| Titanium | Ti (wt%) | 0.524 | 0.092 | 0.138 | 0.755 |
| Zinc | Zn (ppm) | 34.345 | 17.555 | 9.384 | 113.442 |