| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.478 | 0.259 | 0.786 | 2.175 |
| Arsenic | As (ppm) | 2.551 | 0.977 | 1.326 | 6.019 |
| Calcium | Ca (wt%) | 0.072 | 0.014 | 0.035 | 0.127 |
| Copper | Cu (ppm) | 6.520 | 1.872 | 2.742 | 17.066 |
| Iron | Fe (wt%) | 0.839 | 0.153 | 0.511 | 1.406 |
| Mercury | Hg (ppm) | 0.042 | 0.011 | 0.019 | 0.069 |
| Magnesium | Mg (wt%) | 0.062 | 0.011 | 0.035 | 0.083 |
| Manganese | Mn (ppm) | 303.465 | 49.442 | 182.021 | 444.321 |
| Sodium | Na (wt%) | 0.133 | 0.034 | 0.067 | 0.205 |
| Phosphorus | P (wt%) | 0.020 | 0.003 | 0.010 | 0.028 |
| Lead | Pb (ppm) | 11.681 | 3.355 | 6.329 | 26.206 |
| Selenium | Se (ppm) | 0.162 | 0.038 | 0.104 | 0.295 |
| Titanium | Ti (wt%) | 0.320 | 0.046 | 0.229 | 0.508 |
| Zinc | Zn (ppm) | 33.532 | 18.699 | 12.328 | 149.761 |