| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.168 | 0.604 | 3.833 | 5.957 |
| Arsenic | As (ppm) | 5.583 | 0.692 | 3.635 | 6.650 |
| Calcium | Ca (wt%) | 2.518 | 2.153 | 0.706 | 9.653 |
| Copper | Cu (ppm) | 12.521 | 1.517 | 9.652 | 14.974 |
| Iron | Fe (wt%) | 2.177 | 0.315 | 1.411 | 2.548 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.026 |
| Magnesium | Mg (wt%) | 0.600 | 0.100 | 0.442 | 0.785 |
| Manganese | Mn (ppm) | 389.942 | 57.752 | 205.135 | 454.237 |
| Sodium | Na (wt%) | 0.696 | 0.028 | 0.631 | 0.751 |
| Phosphorus | P (wt%) | 0.046 | 0.007 | 0.030 | 0.055 |
| Lead | Pb (ppm) | 20.817 | 2.484 | 16.069 | 23.991 |
| Selenium | Se (ppm) | 0.236 | 0.035 | 0.187 | 0.299 |
| Titanium | Ti (wt%) | 0.260 | 0.029 | 0.182 | 0.288 |
| Zinc | Zn (ppm) | 61.008 | 11.527 | 41.313 | 77.916 |