| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.272 | 1.520 | 0.632 | 13.793 |
| Arsenic | As (ppm) | 5.536 | 3.305 | 1.748 | 19.756 |
| Calcium | Ca (wt%) | 0.077 | 0.079 | 0.004 | 0.441 |
| Copper | Cu (ppm) | 3.526 | 1.151 | 1.030 | 7.430 |
| Iron | Fe (wt%) | 1.362 | 0.751 | 0.580 | 5.267 |
| Mercury | Hg (ppm) | 0.020 | 0.010 | 0.010 | 0.073 |
| Magnesium | Mg (wt%) | 0.089 | 0.052 | 0.021 | 0.325 |
| Manganese | Mn (ppm) | 489.747 | 260.047 | 23.341 | 1834.420 |
| Sodium | Na (wt%) | 0.098 | 0.036 | 0.004 | 0.254 |
| Phosphorus | P (wt%) | 0.022 | 0.011 | 0.010 | 0.062 |
| Lead | Pb (ppm) | 20.748 | 6.487 | 11.103 | 45.964 |
| Selenium | Se (ppm) | 0.408 | 0.406 | 0.103 | 4.035 |
| Titanium | Ti (wt%) | 0.496 | 0.125 | 0.181 | 1.187 |
| Zinc | Zn (ppm) | 25.064 | 9.730 | 7.367 | 63.482 |