| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.727 | 1.304 | 0.609 | 8.346 |
| Arsenic | As (ppm) | 1.980 | 0.573 | 0.727 | 3.572 |
| Calcium | Ca (wt%) | 0.043 | 0.011 | 0.014 | 0.074 |
| Copper | Cu (ppm) | 7.783 | 2.126 | 2.347 | 13.454 |
| Iron | Fe (wt%) | 1.270 | 0.372 | 0.400 | 2.849 |
| Mercury | Hg (ppm) | 0.052 | 0.034 | 0.011 | 0.212 |
| Magnesium | Mg (wt%) | 0.058 | 0.022 | 0.008 | 0.125 |
| Manganese | Mn (ppm) | 165.973 | 47.460 | 74.890 | 329.864 |
| Sodium | Na (wt%) | 0.036 | 0.011 | 0.007 | 0.064 |
| Phosphorus | P (wt%) | 0.028 | 0.007 | 0.011 | 0.049 |
| Lead | Pb (ppm) | 32.052 | 6.583 | 16.682 | 49.847 |
| Selenium | Se (ppm) | 0.355 | 0.119 | 0.105 | 0.697 |
| Titanium | Ti (wt%) | 0.485 | 0.049 | 0.302 | 0.596 |
| Zinc | Zn (ppm) | 26.226 | 5.913 | 11.941 | 46.864 |