| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.898 | 1.411 | 0.615 | 5.880 |
| Arsenic | As (ppm) | 8.753 | 3.317 | 1.807 | 22.108 |
| Calcium | Ca (wt%) | 0.289 | 0.171 | 0.046 | 0.806 |
| Copper | Cu (ppm) | 8.614 | 3.606 | 3.011 | 17.748 |
| Iron | Fe (wt%) | 1.717 | 0.436 | 0.435 | 2.706 |
| Mercury | Hg (ppm) | 0.018 | 0.007 | 0.010 | 0.042 |
| Magnesium | Mg (wt%) | 0.225 | 0.153 | 0.033 | 0.650 |
| Manganese | Mn (ppm) | 816.987 | 313.213 | 268.378 | 2007.060 |
| Sodium | Na (wt%) | 0.445 | 0.214 | 0.073 | 0.853 |
| Phosphorus | P (wt%) | 0.046 | 0.015 | 0.012 | 0.084 |
| Lead | Pb (ppm) | 16.776 | 4.327 | 6.975 | 25.810 |
| Selenium | Se (ppm) | 0.243 | 0.061 | 0.121 | 0.465 |
| Titanium | Ti (wt%) | 0.276 | 0.082 | 0.101 | 0.702 |
| Zinc | Zn (ppm) | 34.820 | 15.036 | 9.995 | 75.934 |