| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.164 | 0.299 | 4.535 | 5.928 |
| Arsenic | As (ppm) | 1.148 | 0.257 | 0.396 | 1.817 |
| Calcium | Ca (wt%) | 1.132 | 0.158 | 0.923 | 1.577 |
| Copper | Cu (ppm) | 6.872 | 1.058 | 4.837 | 10.354 |
| Iron | Fe (wt%) | 1.854 | 0.234 | 1.337 | 2.495 |
| Mercury | Hg (ppm) | 0.067 | 0.011 | 0.048 | 0.104 |
| Magnesium | Mg (wt%) | 0.207 | 0.037 | 0.120 | 0.310 |
| Manganese | Mn (ppm) | 554.085 | 45.752 | 360.886 | 655.013 |
| Sodium | Na (wt%) | 1.778 | 0.155 | 1.463 | 2.213 |
| Phosphorus | P (wt%) | 0.050 | 0.011 | 0.034 | 0.097 |
| Lead | Pb (ppm) | 43.580 | 10.133 | 24.782 | 83.247 |
| Selenium | Se (ppm) | 0.497 | 0.173 | 0.257 | 0.941 |
| Titanium | Ti (wt%) | 0.435 | 0.063 | 0.332 | 0.615 |
| Zinc | Zn (ppm) | 55.499 | 9.825 | 42.028 | 86.541 |