| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.982 | 0.492 | 1.688 | 4.215 |
| Arsenic | As (ppm) | 3.993 | 0.592 | 2.822 | 6.519 |
| Calcium | Ca (wt%) | 0.314 | 0.209 | 0.106 | 1.185 |
| Copper | Cu (ppm) | 7.304 | 1.940 | 2.758 | 15.488 |
| Iron | Fe (wt%) | 1.603 | 0.264 | 0.862 | 2.189 |
| Mercury | Hg (ppm) | 0.025 | 0.007 | 0.010 | 0.048 |
| Magnesium | Mg (wt%) | 0.219 | 0.043 | 0.112 | 0.343 |
| Manganese | Mn (ppm) | 488.422 | 178.036 | 142.286 | 957.179 |
| Sodium | Na (wt%) | 0.398 | 0.087 | 0.177 | 0.605 |
| Phosphorus | P (wt%) | 0.024 | 0.005 | 0.015 | 0.037 |
| Lead | Pb (ppm) | 16.923 | 2.820 | 9.912 | 22.804 |
| Selenium | Se (ppm) | 0.378 | 0.188 | 0.105 | 0.983 |
| Titanium | Ti (wt%) | 0.188 | 0.022 | 0.119 | 0.245 |
| Zinc | Zn (ppm) | 44.024 | 10.772 | 22.354 | 76.109 |