| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.978 | 0.733 | 1.263 | 5.057 |
| Arsenic | As (ppm) | 4.712 | 1.058 | 2.661 | 9.528 |
| Calcium | Ca (wt%) | 0.446 | 0.165 | 0.199 | 1.231 |
| Copper | Cu (ppm) | 10.687 | 1.720 | 5.096 | 15.607 |
| Iron | Fe (wt%) | 1.556 | 0.230 | 0.905 | 2.500 |
| Mercury | Hg (ppm) | 0.044 | 0.009 | 0.010 | 0.082 |
| Magnesium | Mg (wt%) | 0.292 | 0.078 | 0.152 | 0.633 |
| Manganese | Mn (ppm) | 620.765 | 142.446 | 207.720 | 1164.820 |
| Sodium | Na (wt%) | 0.490 | 0.248 | 0.047 | 0.917 |
| Phosphorus | P (wt%) | 0.031 | 0.009 | 0.011 | 0.055 |
| Lead | Pb (ppm) | 20.259 | 4.850 | 5.126 | 31.617 |
| Selenium | Se (ppm) | 0.356 | 0.134 | 0.102 | 0.957 |
| Titanium | Ti (wt%) | 0.293 | 0.057 | 0.062 | 0.405 |
| Zinc | Zn (ppm) | 55.961 | 16.616 | 20.358 | 169.223 |