| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.533 | 0.397 | 0.114 | 2.095 |
| Arsenic | As (ppm) | 1.382 | 0.629 | 0.326 | 4.015 |
| Calcium | Ca (wt%) | 0.035 | 0.027 | 0.007 | 0.325 |
| Copper | Cu (ppm) | 2.673 | 4.113 | 1.000 | 38.969 |
| Iron | Fe (wt%) | 0.397 | 0.194 | 0.124 | 1.102 |
| Mercury | Hg (ppm) | 0.015 | 0.006 | 0.010 | 0.054 |
| Magnesium | Mg (wt%) | 0.024 | 0.018 | 0.006 | 0.158 |
| Manganese | Mn (ppm) | 79.956 | 29.641 | 24.880 | 253.528 |
| Sodium | Na (wt%) | 0.014 | 0.012 | 0.003 | 0.108 |
| Phosphorus | P (wt%) | 0.010 | 0.005 | 0.003 | 0.059 |
| Lead | Pb (ppm) | 13.631 | 5.438 | 3.476 | 42.991 |
| Selenium | Se (ppm) | 0.152 | 0.064 | 0.100 | 0.459 |
| Titanium | Ti (wt%) | 0.383 | 0.089 | 0.105 | 0.647 |
| Zinc | Zn (ppm) | 8.265 | 4.078 | 1.128 | 22.930 |