| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.807 | 0.407 | 0.742 | 4.426 |
| Arsenic | As (ppm) | 3.713 | 1.445 | 1.004 | 12.311 |
| Calcium | Ca (wt%) | 3.000 | 3.329 | 0.185 | 18.136 |
| Copper | Cu (ppm) | 6.742 | 2.032 | 3.217 | 15.451 |
| Iron | Fe (wt%) | 0.710 | 0.231 | 0.325 | 1.941 |
| Mercury | Hg (ppm) | 0.011 | 0.001 | 0.010 | 0.025 |
| Magnesium | Mg (wt%) | 0.193 | 0.055 | 0.075 | 0.433 |
| Manganese | Mn (ppm) | 279.590 | 114.068 | 89.823 | 1238.990 |
| Sodium | Na (wt%) | 0.149 | 0.032 | 0.071 | 0.362 |
| Phosphorus | P (wt%) | 0.014 | 0.009 | 0.004 | 0.056 |
| Lead | Pb (ppm) | 7.811 | 3.460 | 2.124 | 37.060 |
| Selenium | Se (ppm) | 0.190 | 0.105 | 0.100 | 0.837 |
| Titanium | Ti (wt%) | 0.125 | 0.017 | 0.073 | 0.247 |
| Zinc | Zn (ppm) | 13.817 | 5.540 | 3.660 | 43.834 |