| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.148 | 1.264 | 0.958 | 6.147 |
| Arsenic | As (ppm) | 4.808 | 1.256 | 2.418 | 7.499 |
| Calcium | Ca (wt%) | 0.405 | 0.256 | 0.078 | 1.153 |
| Copper | Cu (ppm) | 7.630 | 3.961 | 1.000 | 13.958 |
| Iron | Fe (wt%) | 1.464 | 0.631 | 0.401 | 3.037 |
| Mercury | Hg (ppm) | 0.014 | 0.003 | 0.010 | 0.024 |
| Magnesium | Mg (wt%) | 0.201 | 0.098 | 0.047 | 0.467 |
| Manganese | Mn (ppm) | 491.499 | 318.660 | 74.690 | 1363.790 |
| Sodium | Na (wt%) | 0.137 | 0.049 | 0.056 | 0.207 |
| Phosphorus | P (wt%) | 0.020 | 0.007 | 0.007 | 0.035 |
| Lead | Pb (ppm) | 16.110 | 4.194 | 8.686 | 27.622 |
| Selenium | Se (ppm) | 0.249 | 0.063 | 0.143 | 0.395 |
| Titanium | Ti (wt%) | 0.287 | 0.045 | 0.207 | 0.375 |
| Zinc | Zn (ppm) | 29.072 | 12.618 | 6.586 | 57.273 |