| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.045 | 0.804 | 2.481 | 6.736 |
| Arsenic | As (ppm) | 1.803 | 0.355 | 0.693 | 2.980 |
| Calcium | Ca (wt%) | 0.166 | 0.109 | 0.023 | 0.535 |
| Copper | Cu (ppm) | 8.761 | 1.830 | 2.142 | 10.971 |
| Iron | Fe (wt%) | 2.242 | 0.486 | 0.791 | 2.975 |
| Mercury | Hg (ppm) | 0.033 | 0.008 | 0.011 | 0.056 |
| Magnesium | Mg (wt%) | 0.166 | 0.038 | 0.065 | 0.322 |
| Manganese | Mn (ppm) | 572.988 | 119.901 | 305.844 | 1026.020 |
| Sodium | Na (wt%) | 0.204 | 0.110 | 0.062 | 0.444 |
| Phosphorus | P (wt%) | 0.045 | 0.008 | 0.020 | 0.064 |
| Lead | Pb (ppm) | 28.404 | 11.275 | 13.830 | 67.997 |
| Selenium | Se (ppm) | 0.194 | 0.048 | 0.108 | 0.389 |
| Titanium | Ti (wt%) | 0.657 | 0.125 | 0.348 | 1.103 |
| Zinc | Zn (ppm) | 37.641 | 5.646 | 24.560 | 45.664 |