| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.152 | 1.230 | 0.868 | 8.354 |
| Arsenic | As (ppm) | 5.152 | 1.577 | 1.568 | 10.693 |
| Calcium | Ca (wt%) | 0.070 | 0.053 | 0.008 | 0.394 |
| Copper | Cu (ppm) | 8.630 | 2.593 | 3.659 | 17.613 |
| Iron | Fe (wt%) | 1.683 | 0.605 | 0.509 | 3.669 |
| Mercury | Hg (ppm) | 0.056 | 0.065 | 0.012 | 0.516 |
| Magnesium | Mg (wt%) | 0.038 | 0.012 | 0.009 | 0.096 |
| Manganese | Mn (ppm) | 218.791 | 75.558 | 91.031 | 618.283 |
| Sodium | Na (wt%) | 0.006 | 0.001 | 0.003 | 0.010 |
| Phosphorus | P (wt%) | 0.030 | 0.013 | 0.007 | 0.090 |
| Lead | Pb (ppm) | 19.570 | 5.691 | 5.265 | 40.163 |
| Selenium | Se (ppm) | 0.330 | 0.111 | 0.134 | 0.664 |
| Titanium | Ti (wt%) | 0.339 | 0.065 | 0.130 | 0.611 |
| Zinc | Zn (ppm) | 21.835 | 6.910 | 9.484 | 49.812 |