| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.303 | 0.747 | 0.392 | 5.380 |
| Arsenic | As (ppm) | 4.843 | 3.557 | 1.385 | 25.688 |
| Calcium | Ca (wt%) | 0.038 | 0.015 | 0.008 | 0.110 |
| Copper | Cu (ppm) | 5.381 | 2.851 | 1.899 | 18.144 |
| Iron | Fe (wt%) | 1.610 | 0.926 | 0.440 | 6.422 |
| Mercury | Hg (ppm) | 0.031 | 0.026 | 0.010 | 0.183 |
| Magnesium | Mg (wt%) | 0.036 | 0.013 | 0.015 | 0.093 |
| Manganese | Mn (ppm) | 290.507 | 113.944 | 62.082 | 828.614 |
| Sodium | Na (wt%) | 0.017 | 0.007 | 0.003 | 0.035 |
| Phosphorus | P (wt%) | 0.039 | 0.017 | 0.011 | 0.102 |
| Lead | Pb (ppm) | 25.978 | 8.197 | 4.629 | 56.743 |
| Selenium | Se (ppm) | 0.185 | 0.076 | 0.102 | 0.585 |
| Titanium | Ti (wt%) | 0.712 | 0.159 | 0.108 | 1.293 |
| Zinc | Zn (ppm) | 20.702 | 8.900 | 7.922 | 52.915 |