| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.319 | 0.611 | 4.871 | 8.633 |
| Arsenic | As (ppm) | 6.853 | 1.326 | 3.174 | 9.527 |
| Calcium | Ca (wt%) | 1.331 | 0.487 | 0.716 | 3.191 |
| Copper | Cu (ppm) | 25.776 | 9.450 | 7.346 | 57.651 |
| Iron | Fe (wt%) | 6.276 | 2.491 | 2.710 | 20.155 |
| Mercury | Hg (ppm) | 0.048 | 0.014 | 0.013 | 0.096 |
| Magnesium | Mg (wt%) | 0.993 | 0.331 | 0.508 | 2.364 |
| Manganese | Mn (ppm) | 713.792 | 221.520 | 350.889 | 1799.830 |
| Sodium | Na (wt%) | 1.051 | 0.237 | 0.478 | 1.880 |
| Phosphorus | P (wt%) | 0.084 | 0.012 | 0.055 | 0.110 |
| Lead | Pb (ppm) | 15.113 | 2.235 | 11.469 | 23.453 |
| Selenium | Se (ppm) | 0.489 | 0.231 | 0.104 | 1.156 |
| Titanium | Ti (wt%) | 0.786 | 0.158 | 0.324 | 1.301 |
| Zinc | Zn (ppm) | 110.921 | 24.007 | 68.357 | 228.135 |