| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.646 | 0.372 | 0.108 | 2.064 |
| Arsenic | As (ppm) | 2.061 | 0.767 | 0.822 | 9.021 |
| Calcium | Ca (wt%) | 0.052 | 0.038 | 0.003 | 0.364 |
| Copper | Cu (ppm) | 1.873 | 0.610 | 1.012 | 4.567 |
| Iron | Fe (wt%) | 0.581 | 0.195 | 0.176 | 2.066 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.025 |
| Magnesium | Mg (wt%) | 0.041 | 0.027 | 0.005 | 0.147 |
| Manganese | Mn (ppm) | 119.320 | 34.016 | 29.741 | 263.014 |
| Sodium | Na (wt%) | 0.049 | 0.054 | 0.003 | 0.279 |
| Phosphorus | P (wt%) | 0.009 | 0.003 | 0.003 | 0.028 |
| Lead | Pb (ppm) | 12.063 | 3.427 | 3.070 | 26.910 |
| Selenium | Se (ppm) | 0.158 | 0.082 | 0.100 | 0.867 |
| Titanium | Ti (wt%) | 0.358 | 0.092 | 0.124 | 0.821 |
| Zinc | Zn (ppm) | 11.243 | 3.785 | 3.120 | 33.530 |