| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.325 | 0.979 | 1.409 | 4.823 |
| Arsenic | As (ppm) | 2.433 | 1.124 | 1.378 | 4.544 |
| Calcium | Ca (wt%) | 0.137 | 0.049 | 0.071 | 0.252 |
| Copper | Cu (ppm) | 5.389 | 1.327 | 3.224 | 9.843 |
| Iron | Fe (wt%) | 1.008 | 0.368 | 0.564 | 1.882 |
| Mercury | Hg (ppm) | 0.012 | 0.002 | 0.010 | 0.016 |
| Magnesium | Mg (wt%) | 0.129 | 0.078 | 0.056 | 0.359 |
| Manganese | Mn (ppm) | 200.969 | 32.587 | 137.034 | 278.203 |
| Sodium | Na (wt%) | 0.333 | 0.106 | 0.192 | 0.517 |
| Phosphorus | P (wt%) | 0.015 | 0.003 | 0.008 | 0.020 |
| Lead | Pb (ppm) | 7.999 | 0.828 | 5.107 | 9.334 |
| Selenium | Se (ppm) | 0.162 | 0.069 | 0.100 | 0.328 |
| Titanium | Ti (wt%) | 0.296 | 0.055 | 0.232 | 0.466 |
| Zinc | Zn (ppm) | 22.499 | 7.037 | 15.103 | 41.517 |