| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.951 | 0.422 | 3.834 | 6.676 |
| Arsenic | As (ppm) | 7.660 | 1.157 | 4.910 | 11.266 |
| Calcium | Ca (wt%) | 0.784 | 0.779 | 0.198 | 3.362 |
| Copper | Cu (ppm) | 14.676 | 9.375 | 2.563 | 55.427 |
| Iron | Fe (wt%) | 3.275 | 0.357 | 2.446 | 4.112 |
| Mercury | Hg (ppm) | 0.079 | 0.010 | 0.069 | 0.106 |
| Magnesium | Mg (wt%) | 0.621 | 0.141 | 0.437 | 1.032 |
| Manganese | Mn (ppm) | 661.815 | 27.827 | 554.831 | 711.898 |
| Sodium | Na (wt%) | 0.497 | 0.036 | 0.440 | 0.614 |
| Phosphorus | P (wt%) | 0.053 | 0.004 | 0.042 | 0.071 |
| Lead | Pb (ppm) | 75.297 | 55.309 | 22.308 | 314.460 |
| Selenium | Se (ppm) | 0.264 | 0.101 | 0.104 | 0.487 |
| Titanium | Ti (wt%) | 0.278 | 0.035 | 0.177 | 0.337 |
| Zinc | Zn (ppm) | 365.070 | 323.388 | 81.698 | 1769.910 |