| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.358 | 1.271 | 0.200 | 7.926 |
| Arsenic | As (ppm) | 1.799 | 0.821 | 0.446 | 5.235 |
| Calcium | Ca (wt%) | 0.036 | 0.014 | 0.007 | 0.105 |
| Copper | Cu (ppm) | 4.621 | 1.759 | 1.178 | 11.001 |
| Iron | Fe (wt%) | 0.970 | 0.418 | 0.098 | 2.305 |
| Mercury | Hg (ppm) | 0.020 | 0.011 | 0.011 | 0.091 |
| Magnesium | Mg (wt%) | 0.037 | 0.017 | 0.005 | 0.109 |
| Manganese | Mn (ppm) | 116.387 | 29.143 | 34.718 | 237.094 |
| Sodium | Na (wt%) | 0.037 | 0.019 | 0.005 | 0.082 |
| Phosphorus | P (wt%) | 0.019 | 0.006 | 0.006 | 0.055 |
| Lead | Pb (ppm) | 19.125 | 5.258 | 4.073 | 36.505 |
| Selenium | Se (ppm) | 0.232 | 0.077 | 0.107 | 0.434 |
| Titanium | Ti (wt%) | 0.435 | 0.075 | 0.144 | 0.705 |
| Zinc | Zn (ppm) | 15.978 | 6.071 | 2.368 | 41.365 |