| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.438 | 1.265 | 0.470 | 5.976 |
| Arsenic | As (ppm) | 4.368 | 2.046 | 0.848 | 9.851 |
| Calcium | Ca (wt%) | 1.320 | 2.495 | 0.012 | 17.040 |
| Copper | Cu (ppm) | 8.067 | 2.750 | 3.069 | 14.795 |
| Iron | Fe (wt%) | 1.669 | 0.544 | 0.375 | 2.963 |
| Mercury | Hg (ppm) | 0.046 | 0.022 | 0.010 | 0.135 |
| Magnesium | Mg (wt%) | 0.119 | 0.073 | 0.017 | 0.284 |
| Manganese | Mn (ppm) | 426.416 | 104.762 | 111.345 | 819.707 |
| Sodium | Na (wt%) | 0.061 | 0.033 | 0.011 | 0.195 |
| Phosphorus | P (wt%) | 0.028 | 0.014 | 0.005 | 0.066 |
| Lead | Pb (ppm) | 18.863 | 4.923 | 6.358 | 35.074 |
| Selenium | Se (ppm) | 0.314 | 0.190 | 0.100 | 0.799 |
| Titanium | Ti (wt%) | 0.599 | 0.112 | 0.329 | 1.021 |
| Zinc | Zn (ppm) | 35.830 | 16.250 | 11.357 | 78.419 |