| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.951 | 0.548 | 0.182 | 3.077 |
| Arsenic | As (ppm) | 1.425 | 0.440 | 0.402 | 3.746 |
| Calcium | Ca (wt%) | 0.053 | 0.034 | 0.011 | 0.167 |
| Copper | Cu (ppm) | 3.764 | 1.794 | 1.061 | 10.687 |
| Iron | Fe (wt%) | 0.444 | 0.170 | 0.127 | 0.940 |
| Mercury | Hg (ppm) | 0.026 | 0.015 | 0.010 | 0.081 |
| Magnesium | Mg (wt%) | 0.037 | 0.017 | 0.007 | 0.104 |
| Manganese | Mn (ppm) | 149.614 | 65.142 | 37.357 | 409.397 |
| Sodium | Na (wt%) | 0.040 | 0.024 | 0.006 | 0.165 |
| Phosphorus | P (wt%) | 0.015 | 0.010 | 0.003 | 0.061 |
| Lead | Pb (ppm) | 9.520 | 2.986 | 3.543 | 19.852 |
| Selenium | Se (ppm) | 0.195 | 0.095 | 0.101 | 0.620 |
| Titanium | Ti (wt%) | 0.203 | 0.039 | 0.069 | 0.314 |
| Zinc | Zn (ppm) | 18.954 | 11.309 | 4.411 | 69.237 |