| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.269 | 0.564 | 3.748 | 7.815 |
| Arsenic | As (ppm) | 8.034 | 1.261 | 6.053 | 12.790 |
| Calcium | Ca (wt%) | 0.358 | 0.147 | 0.170 | 1.150 |
| Copper | Cu (ppm) | 14.210 | 4.119 | 2.568 | 32.056 |
| Iron | Fe (wt%) | 2.852 | 0.268 | 2.299 | 3.653 |
| Mercury | Hg (ppm) | 0.029 | 0.005 | 0.017 | 0.055 |
| Magnesium | Mg (wt%) | 0.400 | 0.078 | 0.214 | 0.613 |
| Manganese | Mn (ppm) | 752.983 | 137.125 | 412.745 | 1462.610 |
| Sodium | Na (wt%) | 0.540 | 0.040 | 0.434 | 0.657 |
| Phosphorus | P (wt%) | 0.041 | 0.004 | 0.027 | 0.055 |
| Lead | Pb (ppm) | 21.135 | 3.061 | 15.615 | 37.765 |
| Selenium | Se (ppm) | 0.361 | 0.057 | 0.131 | 0.549 |
| Titanium | Ti (wt%) | 0.332 | 0.027 | 0.218 | 0.411 |
| Zinc | Zn (ppm) | 81.270 | 20.965 | 56.430 | 185.135 |