| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.415 | 0.885 | 2.142 | 6.701 |
| Arsenic | As (ppm) | 2.954 | 0.570 | 1.626 | 4.189 |
| Calcium | Ca (wt%) | 2.641 | 2.714 | 0.362 | 11.087 |
| Copper | Cu (ppm) | 11.558 | 4.326 | 1.179 | 26.807 |
| Iron | Fe (wt%) | 1.979 | 0.731 | 0.664 | 4.424 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.024 |
| Magnesium | Mg (wt%) | 0.509 | 0.158 | 0.177 | 1.005 |
| Manganese | Mn (ppm) | 530.416 | 217.199 | 189.670 | 1288.310 |
| Sodium | Na (wt%) | 0.790 | 0.144 | 0.493 | 1.182 |
| Phosphorus | P (wt%) | 0.037 | 0.014 | 0.020 | 0.093 |
| Lead | Pb (ppm) | 17.113 | 3.610 | 10.087 | 32.022 |
| Selenium | Se (ppm) | 0.209 | 0.129 | 0.100 | 0.802 |
| Titanium | Ti (wt%) | 0.464 | 0.306 | 0.143 | 1.653 |
| Zinc | Zn (ppm) | 40.615 | 16.914 | 11.349 | 120.402 |