| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.177 | 0.121 | 0.014 | 0.681 |
| Arsenic | As (ppm) | 0.867 | 0.207 | 0.314 | 1.630 |
| Calcium | Ca (wt%) | 0.176 | 0.154 | 0.012 | 1.152 |
| Copper | Cu (ppm) | 4.275 | 4.998 | 1.014 | 45.509 |
| Iron | Fe (wt%) | 0.078 | 0.071 | 0.006 | 0.506 |
| Mercury | Hg (ppm) | 0.015 | 0.008 | 0.010 | 0.080 |
| Magnesium | Mg (wt%) | 0.010 | 0.005 | 0.003 | 0.033 |
| Manganese | Mn (ppm) | 23.910 | 20.569 | 2.268 | 171.549 |
| Sodium | Na (wt%) | 0.005 | 0.004 | 0.003 | 0.031 |
| Phosphorus | P (wt%) | 0.011 | 0.006 | 0.003 | 0.037 |
| Lead | Pb (ppm) | 11.438 | 6.021 | 2.161 | 48.374 |
| Selenium | Se (ppm) | 0.154 | 0.072 | 0.100 | 0.544 |
| Titanium | Ti (wt%) | 0.295 | 0.122 | 0.055 | 0.788 |
| Zinc | Zn (ppm) | 6.052 | 3.676 | 1.102 | 34.709 |