| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.167 | 0.684 | 0.060 | 6.836 |
| Arsenic | As (ppm) | 1.242 | 0.648 | 0.312 | 6.593 |
| Calcium | Ca (wt%) | 0.061 | 0.054 | 0.003 | 0.331 |
| Copper | Cu (ppm) | 3.113 | 1.822 | 1.043 | 18.992 |
| Iron | Fe (wt%) | 0.481 | 0.311 | 0.016 | 3.251 |
| Mercury | Hg (ppm) | 0.020 | 0.017 | 0.010 | 0.165 |
| Magnesium | Mg (wt%) | 0.036 | 0.034 | 0.004 | 0.320 |
| Manganese | Mn (ppm) | 75.971 | 37.690 | 4.101 | 312.643 |
| Sodium | Na (wt%) | 0.032 | 0.028 | 0.003 | 0.146 |
| Phosphorus | P (wt%) | 0.013 | 0.007 | 0.003 | 0.062 |
| Lead | Pb (ppm) | 12.590 | 4.159 | 2.384 | 36.889 |
| Selenium | Se (ppm) | 0.267 | 0.143 | 0.102 | 1.164 |
| Titanium | Ti (wt%) | 0.344 | 0.069 | 0.038 | 0.506 |
| Zinc | Zn (ppm) | 11.623 | 6.944 | 1.377 | 70.394 |