| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.343 | 1.026 | 2.049 | 6.007 |
| Arsenic | As (ppm) | 4.262 | 1.214 | 2.165 | 8.829 |
| Calcium | Ca (wt%) | 2.448 | 0.834 | 0.948 | 6.244 |
| Copper | Cu (ppm) | 10.005 | 1.779 | 5.805 | 13.945 |
| Iron | Fe (wt%) | 1.622 | 0.342 | 0.906 | 2.389 |
| Mercury | Hg (ppm) | 0.020 | 0.009 | 0.010 | 0.059 |
| Magnesium | Mg (wt%) | 0.500 | 0.120 | 0.228 | 0.773 |
| Manganese | Mn (ppm) | 307.981 | 57.810 | 181.522 | 437.712 |
| Sodium | Na (wt%) | 0.579 | 0.148 | 0.219 | 0.793 |
| Phosphorus | P (wt%) | 0.035 | 0.012 | 0.012 | 0.070 |
| Lead | Pb (ppm) | 20.733 | 6.959 | 6.772 | 41.669 |
| Selenium | Se (ppm) | 0.231 | 0.048 | 0.102 | 0.397 |
| Titanium | Ti (wt%) | 0.289 | 0.043 | 0.200 | 0.374 |
| Zinc | Zn (ppm) | 43.722 | 9.447 | 22.526 | 63.726 |