| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.906 | 0.588 | 0.726 | 2.645 |
| Arsenic | As (ppm) | 5.438 | 2.164 | 1.500 | 11.206 |
| Calcium | Ca (wt%) | 0.332 | 0.180 | 0.020 | 0.635 |
| Copper | Cu (ppm) | 6.856 | 1.582 | 3.000 | 9.846 |
| Iron | Fe (wt%) | 1.788 | 0.320 | 1.080 | 2.420 |
| Mercury | Hg (ppm) | 0.077 | 0.035 | 0.011 | 0.130 |
| Magnesium | Mg (wt%) | 0.237 | 0.097 | 0.037 | 0.367 |
| Manganese | Mn (ppm) | 375.784 | 82.758 | 265.000 | 590.314 |
| Sodium | Na (wt%) | 0.444 | 0.237 | 0.023 | 0.757 |
| Phosphorus | P (wt%) | 0.020 | 0.005 | 0.009 | 0.029 |
| Lead | Pb (ppm) | 28.333 | 13.943 | 8.184 | 62.222 |
| Selenium | Se (ppm) | 0.284 | 0.070 | 0.105 | 0.391 |
| Titanium | Ti (wt%) | 1.369 | 0.148 | 1.133 | 1.740 |
| Zinc | Zn (ppm) | 39.710 | 7.755 | 20.000 | 53.366 |