| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.485 | 0.682 | 0.527 | 4.221 |
| Arsenic | As (ppm) | 3.205 | 1.608 | 1.260 | 10.915 |
| Calcium | Ca (wt%) | 0.056 | 0.058 | 0.010 | 0.408 |
| Copper | Cu (ppm) | 5.424 | 1.448 | 2.010 | 12.278 |
| Iron | Fe (wt%) | 2.127 | 1.022 | 0.796 | 8.553 |
| Mercury | Hg (ppm) | 0.049 | 0.038 | 0.012 | 0.240 |
| Magnesium | Mg (wt%) | 0.057 | 0.024 | 0.017 | 0.137 |
| Manganese | Mn (ppm) | 545.837 | 299.046 | 120.295 | 2384.060 |
| Sodium | Na (wt%) | 0.031 | 0.017 | 0.003 | 0.095 |
| Phosphorus | P (wt%) | 0.013 | 0.006 | 0.005 | 0.035 |
| Lead | Pb (ppm) | 26.313 | 8.132 | 13.703 | 83.291 |
| Selenium | Se (ppm) | 0.152 | 0.047 | 0.100 | 0.323 |
| Titanium | Ti (wt%) | 0.695 | 0.180 | 0.371 | 1.442 |
| Zinc | Zn (ppm) | 34.188 | 15.180 | 13.898 | 130.873 |