| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.475 | 0.619 | 3.503 | 7.327 |
| Arsenic | As (ppm) | 1.747 | 0.298 | 1.145 | 2.715 |
| Calcium | Ca (wt%) | 0.437 | 0.173 | 0.097 | 0.752 |
| Copper | Cu (ppm) | 10.316 | 3.204 | 5.064 | 21.215 |
| Iron | Fe (wt%) | 4.592 | 2.106 | 2.585 | 11.728 |
| Mercury | Hg (ppm) | 0.041 | 0.010 | 0.027 | 0.076 |
| Magnesium | Mg (wt%) | 0.242 | 0.034 | 0.164 | 0.356 |
| Manganese | Mn (ppm) | 1191.400 | 523.818 | 597.823 | 2891.650 |
| Sodium | Na (wt%) | 0.247 | 0.074 | 0.111 | 0.409 |
| Phosphorus | P (wt%) | 0.025 | 0.014 | 0.003 | 0.059 |
| Lead | Pb (ppm) | 29.804 | 5.591 | 9.519 | 45.635 |
| Selenium | Se (ppm) | 0.230 | 0.056 | 0.145 | 0.420 |
| Titanium | Ti (wt%) | 0.724 | 0.123 | 0.461 | 1.067 |
| Zinc | Zn (ppm) | 50.219 | 12.270 | 29.788 | 89.297 |