| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.737 | 0.747 | 0.540 | 5.253 |
| Arsenic | As (ppm) | 5.224 | 2.905 | 2.019 | 21.616 |
| Calcium | Ca (wt%) | 0.068 | 0.077 | 0.009 | 0.749 |
| Copper | Cu (ppm) | 10.024 | 3.480 | 3.692 | 26.352 |
| Iron | Fe (wt%) | 0.985 | 0.527 | 0.352 | 3.388 |
| Mercury | Hg (ppm) | 0.044 | 0.009 | 0.013 | 0.086 |
| Magnesium | Mg (wt%) | 0.067 | 0.056 | 0.015 | 0.346 |
| Manganese | Mn (ppm) | 181.029 | 154.452 | 40.839 | 1484.110 |
| Sodium | Na (wt%) | 0.069 | 0.089 | 0.006 | 0.546 |
| Phosphorus | P (wt%) | 0.042 | 0.010 | 0.017 | 0.085 |
| Lead | Pb (ppm) | 21.149 | 3.758 | 9.239 | 41.382 |
| Selenium | Se (ppm) | 0.261 | 0.107 | 0.105 | 0.986 |
| Titanium | Ti (wt%) | 0.638 | 0.093 | 0.385 | 1.128 |
| Zinc | Zn (ppm) | 19.938 | 6.131 | 6.998 | 45.030 |