| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.306 | 0.440 | 2.822 | 5.346 |
| Arsenic | As (ppm) | 4.887 | 1.598 | 2.437 | 16.595 |
| Calcium | Ca (wt%) | 3.396 | 0.733 | 1.626 | 6.708 |
| Copper | Cu (ppm) | 12.015 | 2.242 | 6.694 | 20.670 |
| Iron | Fe (wt%) | 1.846 | 0.249 | 1.087 | 2.613 |
| Mercury | Hg (ppm) | 0.018 | 0.009 | 0.010 | 0.069 |
| Magnesium | Mg (wt%) | 0.702 | 0.184 | 0.331 | 1.518 |
| Manganese | Mn (ppm) | 392.235 | 105.690 | 181.556 | 983.188 |
| Sodium | Na (wt%) | 0.648 | 0.104 | 0.335 | 0.907 |
| Phosphorus | P (wt%) | 0.035 | 0.005 | 0.020 | 0.059 |
| Lead | Pb (ppm) | 19.231 | 1.722 | 15.056 | 25.784 |
| Selenium | Se (ppm) | 0.508 | 0.875 | 0.100 | 7.547 |
| Titanium | Ti (wt%) | 0.222 | 0.017 | 0.174 | 0.275 |
| Zinc | Zn (ppm) | 39.358 | 7.777 | 25.098 | 68.075 |