| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.841 | 0.358 | 0.090 | 3.227 |
| Arsenic | As (ppm) | 1.511 | 0.963 | 0.422 | 11.841 |
| Calcium | Ca (wt%) | 0.581 | 1.059 | 0.021 | 13.091 |
| Copper | Cu (ppm) | 9.463 | 20.319 | 1.020 | 229.646 |
| Iron | Fe (wt%) | 0.401 | 0.144 | 0.033 | 1.321 |
| Mercury | Hg (ppm) | 0.019 | 0.011 | 0.010 | 0.112 |
| Magnesium | Mg (wt%) | 0.038 | 0.019 | 0.005 | 0.134 |
| Manganese | Mn (ppm) | 106.359 | 60.669 | 13.638 | 650.089 |
| Sodium | Na (wt%) | 0.006 | 0.002 | 0.003 | 0.019 |
| Phosphorus | P (wt%) | 0.075 | 0.059 | 0.005 | 0.571 |
| Lead | Pb (ppm) | 16.629 | 7.412 | 2.976 | 62.322 |
| Selenium | Se (ppm) | 0.135 | 0.034 | 0.100 | 0.390 |
| Titanium | Ti (wt%) | 0.386 | 0.143 | 0.111 | 1.536 |
| Zinc | Zn (ppm) | 14.119 | 9.878 | 3.055 | 104.874 |