| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.168 | 0.715 | 0.746 | 3.950 |
| Arsenic | As (ppm) | 4.541 | 1.792 | 1.651 | 12.303 |
| Calcium | Ca (wt%) | 0.884 | 0.832 | 0.045 | 3.486 |
| Copper | Cu (ppm) | 4.996 | 0.889 | 2.539 | 8.304 |
| Iron | Fe (wt%) | 1.424 | 0.535 | 0.425 | 2.885 |
| Mercury | Hg (ppm) | 0.015 | 0.005 | 0.010 | 0.032 |
| Magnesium | Mg (wt%) | 0.149 | 0.062 | 0.036 | 0.324 |
| Manganese | Mn (ppm) | 772.919 | 553.518 | 78.239 | 2270.170 |
| Sodium | Na (wt%) | 0.152 | 0.043 | 0.029 | 0.310 |
| Phosphorus | P (wt%) | 0.017 | 0.006 | 0.005 | 0.031 |
| Lead | Pb (ppm) | 15.978 | 4.693 | 6.340 | 30.027 |
| Selenium | Se (ppm) | 0.194 | 0.054 | 0.103 | 0.423 |
| Titanium | Ti (wt%) | 0.193 | 0.033 | 0.100 | 0.285 |
| Zinc | Zn (ppm) | 20.892 | 6.161 | 7.949 | 35.686 |