| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.292 | 0.076 | 0.126 | 0.571 |
| Arsenic | As (ppm) | 1.179 | 0.377 | 0.845 | 3.416 |
| Calcium | Ca (wt%) | 0.162 | 0.105 | 0.049 | 0.831 |
| Copper | Cu (ppm) | 5.158 | 5.122 | 1.446 | 25.360 |
| Iron | Fe (wt%) | 0.196 | 0.034 | 0.110 | 0.296 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.026 |
| Magnesium | Mg (wt%) | 0.012 | 0.003 | 0.005 | 0.023 |
| Manganese | Mn (ppm) | 66.632 | 11.932 | 36.512 | 101.124 |
| Sodium | Na (wt%) | 0.012 | 0.010 | 0.003 | 0.057 |
| Phosphorus | P (wt%) | 0.023 | 0.006 | 0.012 | 0.044 |
| Lead | Pb (ppm) | 16.826 | 4.228 | 11.020 | 38.380 |
| Selenium | Se (ppm) | 0.122 | 0.028 | 0.100 | 0.287 |
| Titanium | Ti (wt%) | 0.407 | 0.044 | 0.296 | 0.548 |
| Zinc | Zn (ppm) | 10.204 | 5.213 | 3.814 | 28.441 |