| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.563 | 0.567 | 2.215 | 4.514 |
| Arsenic | As (ppm) | 5.024 | 0.783 | 3.247 | 7.328 |
| Calcium | Ca (wt%) | 4.052 | 1.433 | 1.795 | 6.724 |
| Copper | Cu (ppm) | 13.450 | 2.321 | 7.491 | 18.148 |
| Iron | Fe (wt%) | 1.531 | 0.098 | 1.256 | 1.842 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 0.799 | 0.460 | 0.308 | 2.361 |
| Manganese | Mn (ppm) | 423.894 | 163.500 | 189.410 | 968.148 |
| Sodium | Na (wt%) | 0.619 | 0.125 | 0.358 | 0.951 |
| Phosphorus | P (wt%) | 0.028 | 0.009 | 0.010 | 0.050 |
| Lead | Pb (ppm) | 20.408 | 3.446 | 11.748 | 29.367 |
| Selenium | Se (ppm) | 0.150 | 0.046 | 0.100 | 0.340 |
| Titanium | Ti (wt%) | 0.237 | 0.020 | 0.204 | 0.286 |
| Zinc | Zn (ppm) | 28.925 | 3.923 | 19.293 | 39.604 |