| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.247 | 0.505 | 3.283 | 4.823 |
| Arsenic | As (ppm) | 7.535 | 1.406 | 5.539 | 9.892 |
| Calcium | Ca (wt%) | 11.229 | 2.838 | 6.915 | 15.851 |
| Copper | Cu (ppm) | 15.204 | 1.484 | 12.178 | 17.612 |
| Iron | Fe (wt%) | 1.852 | 0.223 | 1.428 | 2.105 |
| Mercury | Hg (ppm) | 0.029 | 0.004 | 0.021 | 0.039 |
| Magnesium | Mg (wt%) | 0.610 | 0.080 | 0.456 | 0.702 |
| Manganese | Mn (ppm) | 413.220 | 68.181 | 276.625 | 538.820 |
| Sodium | Na (wt%) | 0.225 | 0.043 | 0.144 | 0.280 |
| Phosphorus | P (wt%) | 0.071 | 0.012 | 0.055 | 0.102 |
| Lead | Pb (ppm) | 14.996 | 2.130 | 12.059 | 18.493 |
| Selenium | Se (ppm) | 0.408 | 0.008 | 0.400 | 0.430 |
| Titanium | Ti (wt%) | 0.252 | 0.038 | 0.177 | 0.292 |
| Zinc | Zn (ppm) | 66.138 | 4.237 | 58.357 | 73.424 |