| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.730 | 0.488 | 0.123 | 4.807 |
| Arsenic | As (ppm) | 1.040 | 0.514 | 0.330 | 4.247 |
| Calcium | Ca (wt%) | 0.050 | 0.044 | 0.007 | 0.258 |
| Copper | Cu (ppm) | 1.915 | 0.801 | 1.018 | 6.560 |
| Iron | Fe (wt%) | 0.317 | 0.149 | 0.033 | 1.080 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.033 |
| Magnesium | Mg (wt%) | 0.021 | 0.019 | 0.003 | 0.121 |
| Manganese | Mn (ppm) | 52.365 | 19.149 | 11.320 | 115.654 |
| Sodium | Na (wt%) | 0.005 | 0.005 | 0.003 | 0.034 |
| Phosphorus | P (wt%) | 0.008 | 0.003 | 0.003 | 0.019 |
| Lead | Pb (ppm) | 8.656 | 2.275 | 2.366 | 17.190 |
| Selenium | Se (ppm) | 0.122 | 0.019 | 0.101 | 0.218 |
| Titanium | Ti (wt%) | 0.284 | 0.079 | 0.044 | 0.539 |
| Zinc | Zn (ppm) | 7.983 | 2.663 | 1.350 | 17.642 |