| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.915 | 0.945 | 3.477 | 6.497 |
| Arsenic | As (ppm) | 8.330 | 2.832 | 4.260 | 20.161 |
| Calcium | Ca (wt%) | 0.481 | 0.201 | 0.169 | 1.073 |
| Copper | Cu (ppm) | 14.580 | 5.364 | 6.066 | 29.635 |
| Iron | Fe (wt%) | 1.970 | 0.447 | 1.152 | 3.042 |
| Mercury | Hg (ppm) | 0.037 | 0.008 | 0.025 | 0.079 |
| Magnesium | Mg (wt%) | 0.390 | 0.161 | 0.146 | 0.700 |
| Manganese | Mn (ppm) | 501.002 | 120.368 | 250.613 | 866.090 |
| Sodium | Na (wt%) | 0.774 | 0.145 | 0.489 | 1.356 |
| Phosphorus | P (wt%) | 0.057 | 0.020 | 0.025 | 0.098 |
| Lead | Pb (ppm) | 17.688 | 1.994 | 13.977 | 28.623 |
| Selenium | Se (ppm) | 0.350 | 0.209 | 0.101 | 1.273 |
| Titanium | Ti (wt%) | 0.310 | 0.024 | 0.269 | 0.387 |
| Zinc | Zn (ppm) | 60.267 | 14.667 | 34.061 | 104.817 |