| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.969 | 0.637 | 4.395 | 7.788 |
| Arsenic | As (ppm) | 5.147 | 1.599 | 1.699 | 9.473 |
| Calcium | Ca (wt%) | 0.926 | 0.301 | 0.374 | 2.119 |
| Copper | Cu (ppm) | 10.986 | 3.284 | 2.051 | 19.919 |
| Iron | Fe (wt%) | 3.580 | 0.653 | 1.280 | 6.254 |
| Mercury | Hg (ppm) | 0.046 | 0.015 | 0.014 | 0.090 |
| Magnesium | Mg (wt%) | 0.778 | 0.140 | 0.179 | 1.153 |
| Manganese | Mn (ppm) | 1037.670 | 283.132 | 535.787 | 2291.820 |
| Sodium | Na (wt%) | 0.962 | 0.102 | 0.759 | 1.301 |
| Phosphorus | P (wt%) | 0.076 | 0.012 | 0.042 | 0.100 |
| Lead | Pb (ppm) | 35.037 | 11.943 | 20.535 | 101.078 |
| Selenium | Se (ppm) | 0.406 | 0.198 | 0.102 | 1.192 |
| Titanium | Ti (wt%) | 0.396 | 0.134 | 0.176 | 0.809 |
| Zinc | Zn (ppm) | 80.308 | 14.272 | 14.328 | 117.810 |