| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.303 | 0.723 | 3.857 | 8.043 |
| Arsenic | As (ppm) | 9.767 | 3.063 | 2.388 | 21.670 |
| Calcium | Ca (wt%) | 3.433 | 1.236 | 0.935 | 10.426 |
| Copper | Cu (ppm) | 23.683 | 6.413 | 12.362 | 64.179 |
| Iron | Fe (wt%) | 2.535 | 0.427 | 1.698 | 4.893 |
| Mercury | Hg (ppm) | 0.035 | 0.014 | 0.010 | 0.101 |
| Magnesium | Mg (wt%) | 1.218 | 0.579 | 0.466 | 3.664 |
| Manganese | Mn (ppm) | 454.189 | 133.388 | 200.153 | 839.086 |
| Sodium | Na (wt%) | 0.555 | 0.213 | 0.128 | 1.322 |
| Phosphorus | P (wt%) | 0.094 | 0.030 | 0.051 | 0.386 |
| Lead | Pb (ppm) | 23.996 | 9.421 | 11.224 | 90.070 |
| Selenium | Se (ppm) | 0.673 | 0.247 | 0.109 | 1.552 |
| Titanium | Ti (wt%) | 0.242 | 0.032 | 0.169 | 0.364 |
| Zinc | Zn (ppm) | 80.972 | 8.888 | 47.741 | 121.682 |