| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.730 | 1.487 | 0.669 | 10.839 |
| Arsenic | As (ppm) | 2.932 | 1.104 | 1.417 | 9.708 |
| Calcium | Ca (wt%) | 0.066 | 0.043 | 0.017 | 0.257 |
| Copper | Cu (ppm) | 8.213 | 2.014 | 5.431 | 18.792 |
| Iron | Fe (wt%) | 1.458 | 0.375 | 0.699 | 3.489 |
| Mercury | Hg (ppm) | 0.066 | 0.028 | 0.021 | 0.215 |
| Magnesium | Mg (wt%) | 0.044 | 0.015 | 0.015 | 0.108 |
| Manganese | Mn (ppm) | 262.441 | 64.845 | 96.191 | 466.561 |
| Sodium | Na (wt%) | 0.074 | 0.067 | 0.011 | 0.411 |
| Phosphorus | P (wt%) | 0.049 | 0.022 | 0.020 | 0.167 |
| Lead | Pb (ppm) | 32.291 | 12.002 | 11.497 | 83.466 |
| Selenium | Se (ppm) | 0.330 | 0.131 | 0.105 | 0.957 |
| Titanium | Ti (wt%) | 0.763 | 0.125 | 0.601 | 1.415 |
| Zinc | Zn (ppm) | 27.913 | 4.246 | 17.655 | 40.467 |