| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.662 | 0.733 | 2.964 | 8.678 |
| Arsenic | As (ppm) | 1.830 | 0.844 | 0.300 | 4.264 |
| Calcium | Ca (wt%) | 0.338 | 0.160 | 0.066 | 0.790 |
| Copper | Cu (ppm) | 7.097 | 2.210 | 3.661 | 17.720 |
| Iron | Fe (wt%) | 2.485 | 0.953 | 1.311 | 5.667 |
| Mercury | Hg (ppm) | 0.210 | 0.167 | 0.021 | 1.247 |
| Magnesium | Mg (wt%) | 0.233 | 0.063 | 0.097 | 0.456 |
| Manganese | Mn (ppm) | 594.909 | 313.185 | 243.215 | 1674.530 |
| Sodium | Na (wt%) | 0.276 | 0.124 | 0.094 | 0.679 |
| Phosphorus | P (wt%) | 0.037 | 0.015 | 0.013 | 0.096 |
| Lead | Pb (ppm) | 26.851 | 7.706 | 13.347 | 48.312 |
| Selenium | Se (ppm) | 0.155 | 0.049 | 0.100 | 0.451 |
| Titanium | Ti (wt%) | 0.634 | 0.199 | 0.316 | 1.346 |
| Zinc | Zn (ppm) | 39.242 | 7.163 | 26.275 | 64.752 |