| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.242 | 0.439 | 0.159 | 2.485 |
| Arsenic | As (ppm) | 1.724 | 0.420 | 0.388 | 2.843 |
| Calcium | Ca (wt%) | 0.065 | 0.038 | 0.011 | 0.292 |
| Copper | Cu (ppm) | 3.583 | 1.338 | 1.035 | 6.775 |
| Iron | Fe (wt%) | 0.508 | 0.141 | 0.047 | 0.850 |
| Mercury | Hg (ppm) | 0.019 | 0.005 | 0.010 | 0.048 |
| Magnesium | Mg (wt%) | 0.039 | 0.022 | 0.006 | 0.163 |
| Manganese | Mn (ppm) | 219.809 | 111.461 | 15.519 | 657.847 |
| Sodium | Na (wt%) | 0.012 | 0.006 | 0.003 | 0.044 |
| Phosphorus | P (wt%) | 0.022 | 0.009 | 0.003 | 0.050 |
| Lead | Pb (ppm) | 13.226 | 4.467 | 2.154 | 21.848 |
| Selenium | Se (ppm) | 0.158 | 0.047 | 0.100 | 0.357 |
| Titanium | Ti (wt%) | 0.339 | 0.093 | 0.054 | 0.514 |
| Zinc | Zn (ppm) | 14.460 | 5.482 | 1.582 | 26.398 |