| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.616 | 0.648 | 3.591 | 7.933 |
| Arsenic | As (ppm) | 8.372 | 2.236 | 5.367 | 23.795 |
| Calcium | Ca (wt%) | 3.628 | 2.115 | 1.183 | 9.866 |
| Copper | Cu (ppm) | 17.741 | 3.586 | 10.939 | 30.831 |
| Iron | Fe (wt%) | 3.094 | 0.725 | 1.990 | 6.814 |
| Mercury | Hg (ppm) | 0.023 | 0.014 | 0.010 | 0.114 |
| Magnesium | Mg (wt%) | 1.313 | 0.663 | 0.652 | 4.595 |
| Manganese | Mn (ppm) | 597.373 | 152.423 | 346.255 | 1283.280 |
| Sodium | Na (wt%) | 0.882 | 0.156 | 0.506 | 1.578 |
| Phosphorus | P (wt%) | 0.122 | 0.034 | 0.055 | 0.305 |
| Lead | Pb (ppm) | 44.425 | 41.699 | 18.513 | 327.961 |
| Selenium | Se (ppm) | 0.449 | 0.232 | 0.102 | 1.468 |
| Titanium | Ti (wt%) | 0.361 | 0.109 | 0.190 | 0.857 |
| Zinc | Zn (ppm) | 106.702 | 24.946 | 59.632 | 269.933 |