| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.388 | 0.531 | 3.563 | 6.868 |
| Arsenic | As (ppm) | 7.560 | 1.928 | 2.000 | 11.434 |
| Calcium | Ca (wt%) | 3.250 | 1.814 | 1.152 | 13.022 |
| Copper | Cu (ppm) | 12.081 | 3.474 | 1.145 | 18.894 |
| Iron | Fe (wt%) | 2.444 | 0.382 | 1.012 | 3.303 |
| Mercury | Hg (ppm) | 0.026 | 0.007 | 0.010 | 0.049 |
| Magnesium | Mg (wt%) | 1.212 | 0.250 | 0.397 | 1.957 |
| Manganese | Mn (ppm) | 303.313 | 49.290 | 167.891 | 453.211 |
| Sodium | Na (wt%) | 0.998 | 0.297 | 0.149 | 1.754 |
| Phosphorus | P (wt%) | 0.062 | 0.007 | 0.046 | 0.078 |
| Lead | Pb (ppm) | 18.538 | 2.841 | 6.189 | 24.856 |
| Selenium | Se (ppm) | 0.648 | 0.365 | 0.109 | 2.513 |
| Titanium | Ti (wt%) | 0.201 | 0.033 | 0.082 | 0.286 |
| Zinc | Zn (ppm) | 63.944 | 14.765 | 28.540 | 127.932 |