| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.968 | 0.420 | 2.837 | 4.857 |
| Arsenic | As (ppm) | 7.432 | 0.835 | 5.414 | 10.196 |
| Calcium | Ca (wt%) | 0.224 | 0.112 | 0.097 | 0.611 |
| Copper | Cu (ppm) | 15.859 | 5.428 | 6.634 | 34.650 |
| Iron | Fe (wt%) | 2.513 | 0.268 | 1.849 | 3.255 |
| Mercury | Hg (ppm) | 0.059 | 0.015 | 0.033 | 0.137 |
| Magnesium | Mg (wt%) | 0.320 | 0.046 | 0.231 | 0.434 |
| Manganese | Mn (ppm) | 566.212 | 97.002 | 369.750 | 920.557 |
| Sodium | Na (wt%) | 0.210 | 0.029 | 0.144 | 0.299 |
| Phosphorus | P (wt%) | 0.037 | 0.005 | 0.023 | 0.046 |
| Lead | Pb (ppm) | 26.855 | 11.371 | 14.796 | 88.071 |
| Selenium | Se (ppm) | 0.292 | 0.125 | 0.105 | 0.754 |
| Titanium | Ti (wt%) | 0.325 | 0.032 | 0.253 | 0.378 |
| Zinc | Zn (ppm) | 77.210 | 15.744 | 48.336 | 128.829 |