| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.551 | 0.734 | 1.268 | 5.578 |
| Arsenic | As (ppm) | 4.856 | 0.951 | 1.810 | 7.247 |
| Calcium | Ca (wt%) | 0.142 | 0.017 | 0.051 | 0.204 |
| Copper | Cu (ppm) | 4.866 | 0.731 | 1.141 | 6.517 |
| Iron | Fe (wt%) | 2.193 | 0.489 | 0.904 | 3.617 |
| Mercury | Hg (ppm) | 0.032 | 0.009 | 0.010 | 0.049 |
| Magnesium | Mg (wt%) | 0.223 | 0.048 | 0.076 | 0.359 |
| Manganese | Mn (ppm) | 730.184 | 337.020 | 131.328 | 1980.320 |
| Sodium | Na (wt%) | 0.294 | 0.041 | 0.103 | 0.395 |
| Phosphorus | P (wt%) | 0.031 | 0.006 | 0.012 | 0.044 |
| Lead | Pb (ppm) | 21.033 | 4.355 | 10.409 | 35.214 |
| Selenium | Se (ppm) | 0.291 | 0.078 | 0.108 | 0.468 |
| Titanium | Ti (wt%) | 0.221 | 0.036 | 0.095 | 0.315 |
| Zinc | Zn (ppm) | 44.320 | 11.611 | 17.250 | 75.862 |