| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.894 | 0.583 | 2.318 | 5.582 |
| Arsenic | As (ppm) | 4.103 | 0.595 | 2.598 | 5.896 |
| Calcium | Ca (wt%) | 0.688 | 0.236 | 0.328 | 1.743 |
| Copper | Cu (ppm) | 9.767 | 1.780 | 3.239 | 15.228 |
| Iron | Fe (wt%) | 1.876 | 0.329 | 1.167 | 2.801 |
| Mercury | Hg (ppm) | 0.012 | 0.002 | 0.010 | 0.020 |
| Magnesium | Mg (wt%) | 0.500 | 0.154 | 0.287 | 1.286 |
| Manganese | Mn (ppm) | 411.623 | 71.479 | 186.776 | 600.616 |
| Sodium | Na (wt%) | 0.567 | 0.056 | 0.369 | 0.678 |
| Phosphorus | P (wt%) | 0.029 | 0.005 | 0.020 | 0.045 |
| Lead | Pb (ppm) | 16.817 | 2.081 | 8.329 | 26.637 |
| Selenium | Se (ppm) | 0.118 | 0.022 | 0.100 | 0.195 |
| Titanium | Ti (wt%) | 0.239 | 0.023 | 0.181 | 0.299 |
| Zinc | Zn (ppm) | 36.096 | 7.493 | 20.365 | 66.022 |