| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.518 | 0.162 | 0.091 | 1.316 |
| Arsenic | As (ppm) | 1.391 | 0.404 | 0.778 | 3.790 |
| Calcium | Ca (wt%) | 0.017 | 0.006 | 0.004 | 0.035 |
| Copper | Cu (ppm) | 2.050 | 0.526 | 1.067 | 3.663 |
| Iron | Fe (wt%) | 0.266 | 0.073 | 0.053 | 0.606 |
| Mercury | Hg (ppm) | 0.012 | 0.004 | 0.010 | 0.042 |
| Magnesium | Mg (wt%) | 0.024 | 0.007 | 0.004 | 0.054 |
| Manganese | Mn (ppm) | 84.914 | 43.343 | 20.050 | 347.850 |
| Sodium | Na (wt%) | 0.028 | 0.012 | 0.004 | 0.084 |
| Phosphorus | P (wt%) | 0.005 | 0.001 | 0.003 | 0.009 |
| Lead | Pb (ppm) | 9.071 | 2.268 | 2.389 | 13.873 |
| Selenium | Se (ppm) | 0.114 | 0.021 | 0.100 | 0.259 |
| Titanium | Ti (wt%) | 0.236 | 0.053 | 0.066 | 0.382 |
| Zinc | Zn (ppm) | 6.802 | 1.456 | 1.317 | 11.520 |