| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.284 | 0.279 | 0.027 | 1.468 |
| Arsenic | As (ppm) | 0.696 | 0.350 | 0.301 | 3.176 |
| Calcium | Ca (wt%) | 0.045 | 0.079 | 0.003 | 0.580 |
| Copper | Cu (ppm) | 1.298 | 0.483 | 1.000 | 3.568 |
| Iron | Fe (wt%) | 0.137 | 0.130 | 0.003 | 0.695 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.008 | 0.007 | 0.003 | 0.043 |
| Manganese | Mn (ppm) | 26.130 | 18.043 | 2.050 | 75.387 |
| Sodium | Na (wt%) | 0.006 | 0.006 | 0.003 | 0.060 |
| Phosphorus | P (wt%) | 0.006 | 0.003 | 0.003 | 0.020 |
| Lead | Pb (ppm) | 5.829 | 3.029 | 2.007 | 15.788 |
| Selenium | Se (ppm) | 0.120 | 0.030 | 0.100 | 0.293 |
| Titanium | Ti (wt%) | 0.173 | 0.096 | 0.018 | 0.417 |
| Zinc | Zn (ppm) | 5.811 | 2.445 | 1.026 | 15.169 |