| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.611 | 2.016 | 0.446 | 9.831 |
| Arsenic | As (ppm) | 3.458 | 1.051 | 1.227 | 6.674 |
| Calcium | Ca (wt%) | 0.062 | 0.037 | 0.014 | 0.223 |
| Copper | Cu (ppm) | 7.842 | 3.214 | 2.137 | 20.261 |
| Iron | Fe (wt%) | 1.353 | 0.382 | 0.567 | 2.502 |
| Mercury | Hg (ppm) | 0.048 | 0.015 | 0.011 | 0.094 |
| Magnesium | Mg (wt%) | 0.078 | 0.035 | 0.012 | 0.166 |
| Manganese | Mn (ppm) | 289.061 | 71.961 | 176.982 | 646.367 |
| Sodium | Na (wt%) | 0.035 | 0.045 | 0.005 | 0.239 |
| Phosphorus | P (wt%) | 0.026 | 0.008 | 0.013 | 0.052 |
| Lead | Pb (ppm) | 25.745 | 10.813 | 9.200 | 70.669 |
| Selenium | Se (ppm) | 0.253 | 0.072 | 0.102 | 0.562 |
| Titanium | Ti (wt%) | 0.636 | 0.099 | 0.431 | 0.855 |
| Zinc | Zn (ppm) | 25.842 | 8.395 | 9.778 | 56.033 |