| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.629 | 0.295 | 0.128 | 2.390 |
| Arsenic | As (ppm) | 1.660 | 0.457 | 0.777 | 3.974 |
| Calcium | Ca (wt%) | 0.018 | 0.012 | 0.003 | 0.128 |
| Copper | Cu (ppm) | 2.283 | 0.865 | 1.012 | 7.507 |
| Iron | Fe (wt%) | 0.336 | 0.141 | 0.080 | 1.095 |
| Mercury | Hg (ppm) | 0.015 | 0.005 | 0.010 | 0.046 |
| Magnesium | Mg (wt%) | 0.024 | 0.011 | 0.004 | 0.094 |
| Manganese | Mn (ppm) | 92.287 | 78.545 | 32.170 | 745.287 |
| Sodium | Na (wt%) | 0.019 | 0.009 | 0.003 | 0.073 |
| Phosphorus | P (wt%) | 0.006 | 0.003 | 0.003 | 0.021 |
| Lead | Pb (ppm) | 10.729 | 4.913 | 2.710 | 45.732 |
| Selenium | Se (ppm) | 0.151 | 0.055 | 0.101 | 0.468 |
| Titanium | Ti (wt%) | 0.259 | 0.049 | 0.083 | 0.456 |
| Zinc | Zn (ppm) | 9.419 | 4.045 | 1.590 | 29.617 |