| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.417 | 0.750 | 2.205 | 6.121 |
| Arsenic | As (ppm) | 4.887 | 1.381 | 1.443 | 11.879 |
| Calcium | Ca (wt%) | 1.784 | 1.348 | 0.356 | 7.396 |
| Copper | Cu (ppm) | 10.690 | 1.574 | 6.104 | 15.801 |
| Iron | Fe (wt%) | 1.958 | 0.367 | 0.769 | 2.785 |
| Mercury | Hg (ppm) | 0.034 | 0.011 | 0.010 | 0.068 |
| Magnesium | Mg (wt%) | 0.531 | 0.154 | 0.221 | 1.115 |
| Manganese | Mn (ppm) | 307.617 | 75.465 | 131.673 | 472.202 |
| Sodium | Na (wt%) | 0.463 | 0.072 | 0.338 | 0.728 |
| Phosphorus | P (wt%) | 0.043 | 0.008 | 0.023 | 0.069 |
| Lead | Pb (ppm) | 20.239 | 3.746 | 10.152 | 29.930 |
| Selenium | Se (ppm) | 0.281 | 0.130 | 0.103 | 0.887 |
| Titanium | Ti (wt%) | 0.225 | 0.034 | 0.106 | 0.297 |
| Zinc | Zn (ppm) | 51.319 | 11.627 | 20.442 | 77.814 |