| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.783 | 0.408 | 0.132 | 2.252 |
| Arsenic | As (ppm) | 4.807 | 2.421 | 1.284 | 16.882 |
| Calcium | Ca (wt%) | 15.590 | 11.207 | 0.304 | 34.736 |
| Copper | Cu (ppm) | 68.787 | 146.259 | 1.134 | 913.811 |
| Iron | Fe (wt%) | 0.615 | 0.320 | 0.072 | 1.431 |
| Mercury | Hg (ppm) | 0.054 | 0.036 | 0.010 | 0.197 |
| Magnesium | Mg (wt%) | 0.294 | 0.297 | 0.021 | 1.121 |
| Manganese | Mn (ppm) | 86.847 | 55.680 | 16.535 | 393.256 |
| Sodium | Na (wt%) | 0.197 | 0.246 | 0.007 | 0.905 |
| Phosphorus | P (wt%) | 0.038 | 0.028 | 0.006 | 0.208 |
| Lead | Pb (ppm) | 38.781 | 67.084 | 2.980 | 411.497 |
| Selenium | Se (ppm) | 0.382 | 0.247 | 0.100 | 1.411 |
| Titanium | Ti (wt%) | 0.095 | 0.072 | 0.010 | 0.320 |
| Zinc | Zn (ppm) | 53.900 | 80.121 | 2.642 | 413.514 |