| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.193 | 0.568 | 3.594 | 7.200 |
| Arsenic | As (ppm) | 5.350 | 0.817 | 3.571 | 7.694 |
| Calcium | Ca (wt%) | 2.722 | 1.019 | 1.099 | 6.275 |
| Copper | Cu (ppm) | 13.455 | 3.743 | 5.454 | 20.856 |
| Iron | Fe (wt%) | 2.393 | 0.317 | 1.651 | 3.485 |
| Mercury | Hg (ppm) | 0.013 | 0.005 | 0.010 | 0.038 |
| Magnesium | Mg (wt%) | 1.517 | 0.359 | 0.731 | 2.552 |
| Manganese | Mn (ppm) | 412.261 | 86.218 | 274.565 | 875.379 |
| Sodium | Na (wt%) | 0.593 | 0.094 | 0.482 | 0.966 |
| Phosphorus | P (wt%) | 0.043 | 0.006 | 0.024 | 0.060 |
| Lead | Pb (ppm) | 19.110 | 3.428 | 13.150 | 27.918 |
| Selenium | Se (ppm) | 0.147 | 0.046 | 0.101 | 0.330 |
| Titanium | Ti (wt%) | 0.259 | 0.028 | 0.163 | 0.340 |
| Zinc | Zn (ppm) | 45.330 | 4.887 | 31.404 | 70.080 |