| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.380 | 0.801 | 1.799 | 5.020 |
| Arsenic | As (ppm) | 5.373 | 1.159 | 2.750 | 8.393 |
| Calcium | Ca (wt%) | 2.791 | 1.049 | 0.866 | 5.432 |
| Copper | Cu (ppm) | 16.628 | 3.801 | 8.527 | 24.556 |
| Iron | Fe (wt%) | 1.708 | 0.282 | 1.192 | 3.433 |
| Mercury | Hg (ppm) | 0.019 | 0.007 | 0.005 | 0.048 |
| Magnesium | Mg (wt%) | 0.568 | 0.196 | 0.230 | 1.038 |
| Manganese | Mn (ppm) | 416.298 | 106.763 | 214.670 | 820.132 |
| Sodium | Na (wt%) | 0.328 | 0.166 | 0.061 | 0.794 |
| Phosphorus | P (wt%) | 0.089 | 0.007 | 0.064 | 0.112 |
| Lead | Pb (ppm) | 26.848 | 32.742 | 7.075 | 267.201 |
| Selenium | Se (ppm) | 0.250 | 0.063 | 0.106 | 0.482 |
| Titanium | Ti (wt%) | 0.209 | 0.062 | 0.091 | 0.387 |
| Zinc | Zn (ppm) | 52.435 | 9.484 | 25.617 | 81.079 |