| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.481 | 0.467 | 0.141 | 4.067 |
| Arsenic | As (ppm) | 3.045 | 0.922 | 0.541 | 8.254 |
| Calcium | Ca (wt%) | 0.031 | 0.013 | 0.004 | 0.097 |
| Copper | Cu (ppm) | 4.587 | 1.389 | 1.428 | 13.022 |
| Iron | Fe (wt%) | 0.857 | 0.271 | 0.128 | 2.615 |
| Mercury | Hg (ppm) | 0.027 | 0.010 | 0.011 | 0.119 |
| Magnesium | Mg (wt%) | 0.039 | 0.011 | 0.004 | 0.127 |
| Manganese | Mn (ppm) | 164.227 | 70.883 | 37.951 | 620.774 |
| Sodium | Na (wt%) | 0.017 | 0.017 | 0.003 | 0.283 |
| Phosphorus | P (wt%) | 0.017 | 0.009 | 0.004 | 0.093 |
| Lead | Pb (ppm) | 19.198 | 4.248 | 6.152 | 44.342 |
| Selenium | Se (ppm) | 0.324 | 0.119 | 0.106 | 1.297 |
| Titanium | Ti (wt%) | 0.412 | 0.055 | 0.185 | 0.610 |
| Zinc | Zn (ppm) | 16.744 | 5.407 | 4.687 | 55.309 |