| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.702 | 0.496 | 0.123 | 4.293 |
| Arsenic | As (ppm) | 2.646 | 0.708 | 1.091 | 6.869 |
| Calcium | Ca (wt%) | 0.153 | 0.097 | 0.008 | 0.612 |
| Copper | Cu (ppm) | 4.681 | 1.098 | 1.202 | 11.271 |
| Iron | Fe (wt%) | 0.777 | 0.195 | 0.048 | 1.649 |
| Mercury | Hg (ppm) | 0.040 | 0.012 | 0.012 | 0.108 |
| Magnesium | Mg (wt%) | 0.045 | 0.017 | 0.004 | 0.113 |
| Manganese | Mn (ppm) | 209.034 | 81.193 | 12.623 | 656.997 |
| Sodium | Na (wt%) | 0.080 | 0.056 | 0.006 | 0.366 |
| Phosphorus | P (wt%) | 0.029 | 0.015 | 0.004 | 0.140 |
| Lead | Pb (ppm) | 19.191 | 6.443 | 2.868 | 56.099 |
| Selenium | Se (ppm) | 0.379 | 0.122 | 0.103 | 1.012 |
| Titanium | Ti (wt%) | 0.621 | 0.133 | 0.042 | 1.374 |
| Zinc | Zn (ppm) | 25.980 | 16.258 | 2.201 | 123.700 |