| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.556 | 0.502 | 4.422 | 6.972 |
| Arsenic | As (ppm) | 6.326 | 2.989 | 1.025 | 15.525 |
| Calcium | Ca (wt%) | 1.404 | 0.328 | 0.673 | 2.744 |
| Copper | Cu (ppm) | 11.443 | 3.151 | 1.565 | 27.067 |
| Iron | Fe (wt%) | 3.209 | 0.592 | 1.476 | 5.105 |
| Mercury | Hg (ppm) | 0.031 | 0.010 | 0.010 | 0.090 |
| Magnesium | Mg (wt%) | 0.795 | 0.244 | 0.197 | 1.753 |
| Manganese | Mn (ppm) | 1198.810 | 295.491 | 504.748 | 2729.400 |
| Sodium | Na (wt%) | 1.431 | 0.157 | 0.687 | 1.867 |
| Phosphorus | P (wt%) | 0.051 | 0.013 | 0.026 | 0.102 |
| Lead | Pb (ppm) | 19.347 | 4.104 | 7.628 | 37.031 |
| Selenium | Se (ppm) | 0.139 | 0.046 | 0.100 | 0.381 |
| Titanium | Ti (wt%) | 0.848 | 0.246 | 0.409 | 1.652 |
| Zinc | Zn (ppm) | 56.757 | 14.070 | 18.299 | 112.538 |