| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.947 | 0.378 | 0.115 | 2.952 |
| Arsenic | As (ppm) | 2.426 | 1.546 | 1.075 | 10.486 |
| Calcium | Ca (wt%) | 0.027 | 0.013 | 0.004 | 0.083 |
| Copper | Cu (ppm) | 2.267 | 1.082 | 1.016 | 9.105 |
| Iron | Fe (wt%) | 0.293 | 0.097 | 0.051 | 0.556 |
| Mercury | Hg (ppm) | 0.063 | 0.160 | 0.010 | 0.935 |
| Magnesium | Mg (wt%) | 0.022 | 0.008 | 0.004 | 0.058 |
| Manganese | Mn (ppm) | 60.316 | 31.625 | 10.976 | 191.748 |
| Sodium | Na (wt%) | 0.016 | 0.009 | 0.004 | 0.058 |
| Phosphorus | P (wt%) | 0.011 | 0.003 | 0.003 | 0.020 |
| Lead | Pb (ppm) | 17.585 | 3.974 | 7.343 | 28.395 |
| Selenium | Se (ppm) | 0.200 | 0.060 | 0.103 | 0.524 |
| Titanium | Ti (wt%) | 0.407 | 0.054 | 0.234 | 0.572 |
| Zinc | Zn (ppm) | 9.870 | 6.070 | 1.257 | 42.715 |