| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.882 | 1.134 | 0.429 | 6.593 |
| Arsenic | As (ppm) | 3.243 | 1.353 | 0.706 | 10.922 |
| Calcium | Ca (wt%) | 0.048 | 0.016 | 0.009 | 0.142 |
| Copper | Cu (ppm) | 7.206 | 3.696 | 1.329 | 32.758 |
| Iron | Fe (wt%) | 1.158 | 0.533 | 0.229 | 3.510 |
| Mercury | Hg (ppm) | 0.035 | 0.026 | 0.011 | 0.223 |
| Magnesium | Mg (wt%) | 0.037 | 0.012 | 0.007 | 0.079 |
| Manganese | Mn (ppm) | 288.555 | 117.894 | 68.055 | 610.481 |
| Sodium | Na (wt%) | 0.005 | 0.001 | 0.003 | 0.010 |
| Phosphorus | P (wt%) | 0.024 | 0.008 | 0.007 | 0.057 |
| Lead | Pb (ppm) | 15.755 | 3.575 | 6.380 | 30.040 |
| Selenium | Se (ppm) | 0.317 | 0.090 | 0.109 | 0.567 |
| Titanium | Ti (wt%) | 0.362 | 0.070 | 0.203 | 0.559 |
| Zinc | Zn (ppm) | 23.850 | 7.144 | 9.498 | 59.916 |