| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.098 | 0.704 | 5.600 | 8.721 |
| Arsenic | As (ppm) | 4.827 | 1.443 | 2.728 | 9.800 |
| Calcium | Ca (wt%) | 1.736 | 0.591 | 0.910 | 3.749 |
| Copper | Cu (ppm) | 30.231 | 23.772 | 1.196 | 90.111 |
| Iron | Fe (wt%) | 5.493 | 2.295 | 2.641 | 11.808 |
| Mercury | Hg (ppm) | 0.031 | 0.013 | 0.010 | 0.069 |
| Magnesium | Mg (wt%) | 1.428 | 0.887 | 0.568 | 4.151 |
| Manganese | Mn (ppm) | 939.138 | 287.225 | 472.493 | 1709.560 |
| Sodium | Na (wt%) | 1.317 | 0.394 | 0.498 | 1.896 |
| Phosphorus | P (wt%) | 0.063 | 0.024 | 0.009 | 0.132 |
| Lead | Pb (ppm) | 12.468 | 2.577 | 5.096 | 16.753 |
| Selenium | Se (ppm) | 0.301 | 0.221 | 0.100 | 1.081 |
| Titanium | Ti (wt%) | 0.861 | 0.252 | 0.274 | 1.562 |
| Zinc | Zn (ppm) | 88.098 | 20.333 | 36.789 | 137.840 |