| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.981 | 0.500 | 1.271 | 5.530 |
| Arsenic | As (ppm) | 6.722 | 1.033 | 3.064 | 9.514 |
| Calcium | Ca (wt%) | 7.095 | 1.628 | 1.533 | 15.616 |
| Copper | Cu (ppm) | 13.138 | 1.564 | 6.675 | 16.466 |
| Iron | Fe (wt%) | 1.829 | 0.185 | 0.643 | 2.325 |
| Mercury | Hg (ppm) | 0.019 | 0.007 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.587 | 0.158 | 0.244 | 1.374 |
| Manganese | Mn (ppm) | 413.474 | 53.179 | 206.246 | 561.565 |
| Sodium | Na (wt%) | 0.291 | 0.126 | 0.067 | 1.002 |
| Phosphorus | P (wt%) | 0.045 | 0.009 | 0.025 | 0.068 |
| Lead | Pb (ppm) | 16.163 | 3.574 | 3.137 | 29.802 |
| Selenium | Se (ppm) | 0.283 | 0.086 | 0.103 | 0.586 |
| Titanium | Ti (wt%) | 0.223 | 0.037 | 0.073 | 0.306 |
| Zinc | Zn (ppm) | 49.259 | 7.360 | 16.308 | 66.797 |