| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.353 | 0.411 | 3.219 | 5.322 |
| Arsenic | As (ppm) | 13.007 | 2.208 | 7.871 | 18.790 |
| Calcium | Ca (wt%) | 0.512 | 0.677 | 0.152 | 3.012 |
| Copper | Cu (ppm) | 16.716 | 2.227 | 14.256 | 23.354 |
| Iron | Fe (wt%) | 2.839 | 0.245 | 2.352 | 3.485 |
| Mercury | Hg (ppm) | 0.608 | 0.462 | 0.099 | 2.073 |
| Magnesium | Mg (wt%) | 0.300 | 0.037 | 0.236 | 0.385 |
| Manganese | Mn (ppm) | 668.820 | 106.839 | 536.290 | 1029.140 |
| Sodium | Na (wt%) | 0.142 | 0.017 | 0.091 | 0.178 |
| Phosphorus | P (wt%) | 0.036 | 0.003 | 0.030 | 0.040 |
| Lead | Pb (ppm) | 31.375 | 2.146 | 24.687 | 38.861 |
| Selenium | Se (ppm) | 0.318 | 0.067 | 0.167 | 0.504 |
| Titanium | Ti (wt%) | 0.308 | 0.012 | 0.282 | 0.338 |
| Zinc | Zn (ppm) | 68.126 | 6.911 | 54.955 | 94.701 |