| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.447 | 0.742 | 0.580 | 4.293 |
| Arsenic | As (ppm) | 6.915 | 4.401 | 2.046 | 28.895 |
| Calcium | Ca (wt%) | 0.415 | 0.228 | 0.038 | 1.351 |
| Copper | Cu (ppm) | 9.308 | 3.399 | 3.191 | 23.613 |
| Iron | Fe (wt%) | 1.465 | 0.491 | 0.485 | 3.590 |
| Mercury | Hg (ppm) | 0.029 | 0.011 | 0.010 | 0.059 |
| Magnesium | Mg (wt%) | 0.135 | 0.031 | 0.033 | 0.225 |
| Manganese | Mn (ppm) | 784.645 | 584.797 | 238.562 | 3124.520 |
| Sodium | Na (wt%) | 0.221 | 0.218 | 0.025 | 0.825 |
| Phosphorus | P (wt%) | 0.076 | 0.085 | 0.011 | 0.539 |
| Lead | Pb (ppm) | 14.213 | 4.646 | 4.243 | 30.590 |
| Selenium | Se (ppm) | 0.174 | 0.052 | 0.102 | 0.297 |
| Titanium | Ti (wt%) | 0.183 | 0.052 | 0.046 | 0.314 |
| Zinc | Zn (ppm) | 48.481 | 24.616 | 12.807 | 174.424 |