| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.866 | 0.676 | 2.401 | 6.681 |
| Arsenic | As (ppm) | 1.410 | 0.575 | 0.374 | 3.199 |
| Calcium | Ca (wt%) | 0.482 | 0.112 | 0.170 | 0.769 |
| Copper | Cu (ppm) | 7.562 | 2.041 | 3.008 | 15.455 |
| Iron | Fe (wt%) | 2.360 | 0.647 | 1.301 | 4.238 |
| Mercury | Hg (ppm) | 0.147 | 0.093 | 0.024 | 0.570 |
| Magnesium | Mg (wt%) | 0.198 | 0.038 | 0.139 | 0.359 |
| Manganese | Mn (ppm) | 501.266 | 166.785 | 143.293 | 1027.100 |
| Sodium | Na (wt%) | 0.351 | 0.120 | 0.120 | 0.938 |
| Phosphorus | P (wt%) | 0.023 | 0.006 | 0.014 | 0.048 |
| Lead | Pb (ppm) | 19.831 | 4.956 | 13.025 | 33.390 |
| Selenium | Se (ppm) | 0.120 | 0.038 | 0.100 | 0.361 |
| Titanium | Ti (wt%) | 0.588 | 0.231 | 0.310 | 1.630 |
| Zinc | Zn (ppm) | 33.983 | 5.875 | 22.009 | 64.586 |