| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.438 | 0.851 | 0.369 | 4.373 |
| Arsenic | As (ppm) | 3.769 | 2.395 | 1.548 | 16.052 |
| Calcium | Ca (wt%) | 0.328 | 0.375 | 0.032 | 1.722 |
| Copper | Cu (ppm) | 4.960 | 2.249 | 1.672 | 15.274 |
| Iron | Fe (wt%) | 0.816 | 0.297 | 0.253 | 1.663 |
| Mercury | Hg (ppm) | 0.013 | 0.005 | 0.010 | 0.034 |
| Magnesium | Mg (wt%) | 0.168 | 0.175 | 0.023 | 0.889 |
| Manganese | Mn (ppm) | 315.022 | 129.763 | 92.401 | 751.434 |
| Sodium | Na (wt%) | 0.228 | 0.192 | 0.015 | 0.873 |
| Phosphorus | P (wt%) | 0.018 | 0.011 | 0.007 | 0.053 |
| Lead | Pb (ppm) | 10.659 | 2.791 | 4.285 | 17.225 |
| Selenium | Se (ppm) | 0.142 | 0.046 | 0.100 | 0.420 |
| Titanium | Ti (wt%) | 0.282 | 0.111 | 0.099 | 0.670 |
| Zinc | Zn (ppm) | 18.293 | 8.325 | 7.425 | 50.040 |