| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.732 | 0.577 | 1.358 | 4.629 |
| Arsenic | As (ppm) | 4.464 | 1.291 | 1.928 | 7.700 |
| Calcium | Ca (wt%) | 0.161 | 0.048 | 0.071 | 0.365 |
| Copper | Cu (ppm) | 5.033 | 0.994 | 2.398 | 7.689 |
| Iron | Fe (wt%) | 1.666 | 0.504 | 0.712 | 2.855 |
| Mercury | Hg (ppm) | 0.021 | 0.009 | 0.010 | 0.053 |
| Magnesium | Mg (wt%) | 0.170 | 0.039 | 0.080 | 0.334 |
| Manganese | Mn (ppm) | 364.876 | 114.838 | 179.340 | 969.780 |
| Sodium | Na (wt%) | 0.295 | 0.101 | 0.165 | 0.561 |
| Phosphorus | P (wt%) | 0.019 | 0.003 | 0.010 | 0.027 |
| Lead | Pb (ppm) | 17.166 | 2.549 | 7.228 | 27.985 |
| Selenium | Se (ppm) | 0.300 | 0.124 | 0.102 | 0.600 |
| Titanium | Ti (wt%) | 0.174 | 0.022 | 0.113 | 0.222 |
| Zinc | Zn (ppm) | 35.004 | 9.967 | 15.418 | 89.760 |