| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.574 | 1.341 | 1.890 | 8.488 |
| Arsenic | As (ppm) | 4.221 | 1.606 | 1.328 | 22.149 |
| Calcium | Ca (wt%) | 5.215 | 3.098 | 0.777 | 18.342 |
| Copper | Cu (ppm) | 25.352 | 13.840 | 10.229 | 119.278 |
| Iron | Fe (wt%) | 3.319 | 1.285 | 0.908 | 9.957 |
| Mercury | Hg (ppm) | 0.019 | 0.009 | 0.010 | 0.071 |
| Magnesium | Mg (wt%) | 0.862 | 0.244 | 0.303 | 2.123 |
| Manganese | Mn (ppm) | 566.632 | 231.449 | 78.197 | 1659.970 |
| Sodium | Na (wt%) | 1.228 | 0.391 | 0.567 | 2.335 |
| Phosphorus | P (wt%) | 0.063 | 0.028 | 0.021 | 0.508 |
| Lead | Pb (ppm) | 30.761 | 24.973 | 7.284 | 341.219 |
| Selenium | Se (ppm) | 0.160 | 0.060 | 0.100 | 0.399 |
| Titanium | Ti (wt%) | 0.443 | 0.170 | 0.117 | 1.369 |
| Zinc | Zn (ppm) | 73.337 | 25.823 | 18.701 | 183.906 |