| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.433 | 0.771 | 2.513 | 6.734 |
| Arsenic | As (ppm) | 8.016 | 1.605 | 5.046 | 12.113 |
| Calcium | Ca (wt%) | 0.440 | 0.619 | 0.036 | 2.602 |
| Copper | Cu (ppm) | 16.776 | 3.463 | 10.535 | 28.268 |
| Iron | Fe (wt%) | 4.031 | 0.382 | 3.190 | 5.008 |
| Mercury | Hg (ppm) | 0.035 | 0.009 | 0.015 | 0.069 |
| Magnesium | Mg (wt%) | 0.373 | 0.307 | 0.099 | 1.258 |
| Manganese | Mn (ppm) | 1134.490 | 683.128 | 199.852 | 2971.980 |
| Sodium | Na (wt%) | 0.302 | 0.327 | 0.057 | 1.266 |
| Phosphorus | P (wt%) | 0.044 | 0.007 | 0.021 | 0.065 |
| Lead | Pb (ppm) | 17.008 | 4.875 | 7.963 | 28.073 |
| Selenium | Se (ppm) | 0.419 | 0.063 | 0.268 | 0.597 |
| Titanium | Ti (wt%) | 0.268 | 0.058 | 0.125 | 0.430 |
| Zinc | Zn (ppm) | 99.374 | 24.684 | 45.401 | 156.090 |