| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.905 | 0.432 | 1.600 | 4.253 |
| Arsenic | As (ppm) | 5.131 | 1.640 | 2.779 | 11.940 |
| Calcium | Ca (wt%) | 0.374 | 0.105 | 0.181 | 0.810 |
| Copper | Cu (ppm) | 7.988 | 1.291 | 4.000 | 10.957 |
| Iron | Fe (wt%) | 1.670 | 0.422 | 0.916 | 3.027 |
| Mercury | Hg (ppm) | 0.055 | 0.057 | 0.010 | 0.418 |
| Magnesium | Mg (wt%) | 0.163 | 0.029 | 0.083 | 0.256 |
| Manganese | Mn (ppm) | 1074.180 | 555.416 | 431.014 | 4304.710 |
| Sodium | Na (wt%) | 0.178 | 0.039 | 0.039 | 0.271 |
| Phosphorus | P (wt%) | 0.044 | 0.011 | 0.020 | 0.093 |
| Lead | Pb (ppm) | 25.814 | 4.941 | 11.896 | 42.831 |
| Selenium | Se (ppm) | 0.423 | 0.150 | 0.112 | 1.055 |
| Titanium | Ti (wt%) | 0.217 | 0.027 | 0.080 | 0.294 |
| Zinc | Zn (ppm) | 59.400 | 15.934 | 28.297 | 105.854 |