| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.713 | 0.274 | 1.751 | 3.877 |
| Arsenic | As (ppm) | 5.925 | 0.849 | 4.033 | 9.671 |
| Calcium | Ca (wt%) | 0.705 | 0.413 | 0.190 | 3.018 |
| Copper | Cu (ppm) | 11.184 | 1.502 | 7.010 | 18.013 |
| Iron | Fe (wt%) | 1.589 | 0.205 | 1.013 | 2.126 |
| Mercury | Hg (ppm) | 0.083 | 0.046 | 0.017 | 0.343 |
| Magnesium | Mg (wt%) | 0.202 | 0.122 | 0.101 | 1.062 |
| Manganese | Mn (ppm) | 783.636 | 147.991 | 340.804 | 1400.570 |
| Sodium | Na (wt%) | 0.118 | 0.018 | 0.060 | 0.183 |
| Phosphorus | P (wt%) | 0.041 | 0.009 | 0.021 | 0.079 |
| Lead | Pb (ppm) | 26.070 | 5.287 | 13.827 | 41.789 |
| Selenium | Se (ppm) | 0.337 | 0.061 | 0.171 | 0.545 |
| Titanium | Ti (wt%) | 0.221 | 0.039 | 0.104 | 0.349 |
| Zinc | Zn (ppm) | 54.871 | 8.325 | 32.709 | 92.677 |