| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.572 | 0.439 | 3.928 | 7.426 |
| Arsenic | As (ppm) | 12.452 | 20.386 | 0.923 | 189.845 |
| Calcium | Ca (wt%) | 1.132 | 0.733 | 0.370 | 5.627 |
| Copper | Cu (ppm) | 16.930 | 5.084 | 4.094 | 44.944 |
| Iron | Fe (wt%) | 2.693 | 0.336 | 1.793 | 3.826 |
| Mercury | Hg (ppm) | 0.044 | 0.023 | 0.010 | 0.187 |
| Magnesium | Mg (wt%) | 0.885 | 0.256 | 0.447 | 2.026 |
| Manganese | Mn (ppm) | 574.803 | 164.086 | 179.223 | 1738.590 |
| Sodium | Na (wt%) | 0.900 | 0.179 | 0.331 | 1.815 |
| Phosphorus | P (wt%) | 0.049 | 0.017 | 0.021 | 0.147 |
| Lead | Pb (ppm) | 28.520 | 15.023 | 15.275 | 150.898 |
| Selenium | Se (ppm) | 0.308 | 0.173 | 0.100 | 1.215 |
| Titanium | Ti (wt%) | 0.385 | 0.127 | 0.155 | 0.841 |
| Zinc | Zn (ppm) | 69.829 | 19.749 | 31.228 | 179.911 |