| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.975 | 0.786 | 3.138 | 6.724 |
| Arsenic | As (ppm) | 5.197 | 1.086 | 2.751 | 9.842 |
| Calcium | Ca (wt%) | 2.308 | 0.923 | 0.503 | 9.655 |
| Copper | Cu (ppm) | 12.290 | 3.081 | 3.754 | 22.892 |
| Iron | Fe (wt%) | 2.236 | 0.477 | 1.248 | 4.646 |
| Mercury | Hg (ppm) | 0.017 | 0.006 | 0.010 | 0.059 |
| Magnesium | Mg (wt%) | 0.555 | 0.124 | 0.285 | 0.921 |
| Manganese | Mn (ppm) | 389.537 | 88.865 | 186.687 | 674.437 |
| Sodium | Na (wt%) | 0.656 | 0.116 | 0.293 | 1.029 |
| Phosphorus | P (wt%) | 0.053 | 0.016 | 0.020 | 0.104 |
| Lead | Pb (ppm) | 21.547 | 4.250 | 13.187 | 42.660 |
| Selenium | Se (ppm) | 0.299 | 0.132 | 0.100 | 0.889 |
| Titanium | Ti (wt%) | 0.282 | 0.049 | 0.165 | 0.565 |
| Zinc | Zn (ppm) | 53.758 | 14.549 | 23.314 | 166.391 |