| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.866 | 0.845 | 0.525 | 4.206 |
| Arsenic | As (ppm) | 3.624 | 1.575 | 0.952 | 9.063 |
| Calcium | Ca (wt%) | 0.126 | 0.098 | 0.017 | 0.623 |
| Copper | Cu (ppm) | 6.345 | 2.375 | 2.288 | 23.700 |
| Iron | Fe (wt%) | 0.745 | 0.300 | 0.282 | 1.814 |
| Mercury | Hg (ppm) | 0.017 | 0.007 | 0.010 | 0.047 |
| Magnesium | Mg (wt%) | 0.159 | 0.137 | 0.025 | 0.775 |
| Manganese | Mn (ppm) | 222.309 | 104.895 | 71.936 | 733.116 |
| Sodium | Na (wt%) | 0.268 | 0.190 | 0.025 | 0.884 |
| Phosphorus | P (wt%) | 0.016 | 0.011 | 0.005 | 0.049 |
| Lead | Pb (ppm) | 12.514 | 5.204 | 2.826 | 54.285 |
| Selenium | Se (ppm) | 0.155 | 0.042 | 0.100 | 0.373 |
| Titanium | Ti (wt%) | 0.235 | 0.031 | 0.127 | 0.370 |
| Zinc | Zn (ppm) | 22.365 | 14.746 | 6.524 | 87.152 |