| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.938 | 0.754 | 3.866 | 7.085 |
| Arsenic | As (ppm) | 2.417 | 1.656 | 0.518 | 6.269 |
| Calcium | Ca (wt%) | 0.957 | 0.255 | 0.388 | 1.545 |
| Copper | Cu (ppm) | 13.947 | 5.217 | 2.050 | 29.788 |
| Iron | Fe (wt%) | 3.208 | 1.112 | 0.591 | 6.560 |
| Mercury | Hg (ppm) | 0.245 | 0.212 | 0.030 | 1.081 |
| Magnesium | Mg (wt%) | 0.331 | 0.109 | 0.101 | 0.614 |
| Manganese | Mn (ppm) | 1082.360 | 434.227 | 173.846 | 2537.830 |
| Sodium | Na (wt%) | 0.801 | 0.114 | 0.385 | 1.098 |
| Phosphorus | P (wt%) | 0.028 | 0.010 | 0.010 | 0.065 |
| Lead | Pb (ppm) | 23.624 | 11.251 | 8.030 | 53.578 |
| Selenium | Se (ppm) | 0.154 | 0.039 | 0.100 | 0.245 |
| Titanium | Ti (wt%) | 0.658 | 0.187 | 0.163 | 1.324 |
| Zinc | Zn (ppm) | 47.357 | 17.940 | 14.281 | 113.221 |