| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.009 | 0.742 | 2.020 | 5.462 |
| Arsenic | As (ppm) | 4.728 | 1.811 | 1.632 | 10.466 |
| Calcium | Ca (wt%) | 2.460 | 0.836 | 0.598 | 4.449 |
| Copper | Cu (ppm) | 9.230 | 2.782 | 3.045 | 13.559 |
| Iron | Fe (wt%) | 1.788 | 0.280 | 1.021 | 2.319 |
| Mercury | Hg (ppm) | 0.015 | 0.006 | 0.010 | 0.037 |
| Magnesium | Mg (wt%) | 0.592 | 0.277 | 0.253 | 2.337 |
| Manganese | Mn (ppm) | 336.834 | 66.501 | 175.190 | 461.983 |
| Sodium | Na (wt%) | 0.557 | 0.109 | 0.100 | 0.798 |
| Phosphorus | P (wt%) | 0.034 | 0.008 | 0.010 | 0.047 |
| Lead | Pb (ppm) | 16.790 | 3.302 | 12.026 | 22.891 |
| Selenium | Se (ppm) | 0.182 | 0.051 | 0.100 | 0.298 |
| Titanium | Ti (wt%) | 0.235 | 0.033 | 0.169 | 0.329 |
| Zinc | Zn (ppm) | 43.873 | 14.440 | 11.298 | 78.854 |