| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.729 | 1.330 | 0.426 | 6.927 |
| Arsenic | As (ppm) | 7.669 | 5.591 | 0.915 | 28.536 |
| Calcium | Ca (wt%) | 1.693 | 2.919 | 0.012 | 17.856 |
| Copper | Cu (ppm) | 8.547 | 4.328 | 1.271 | 23.110 |
| Iron | Fe (wt%) | 2.219 | 1.151 | 0.426 | 5.790 |
| Mercury | Hg (ppm) | 0.148 | 0.231 | 0.011 | 3.152 |
| Magnesium | Mg (wt%) | 0.223 | 0.128 | 0.032 | 0.621 |
| Manganese | Mn (ppm) | 553.100 | 347.657 | 89.213 | 1636.770 |
| Sodium | Na (wt%) | 0.136 | 0.048 | 0.028 | 0.311 |
| Phosphorus | P (wt%) | 0.039 | 0.021 | 0.004 | 0.115 |
| Lead | Pb (ppm) | 23.617 | 9.260 | 8.051 | 60.403 |
| Selenium | Se (ppm) | 0.417 | 0.243 | 0.102 | 1.275 |
| Titanium | Ti (wt%) | 0.503 | 0.100 | 0.245 | 0.861 |
| Zinc | Zn (ppm) | 40.929 | 20.504 | 6.793 | 101.868 |