| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.223 | 0.928 | 2.341 | 6.092 |
| Arsenic | As (ppm) | 6.022 | 1.441 | 2.111 | 12.146 |
| Calcium | Ca (wt%) | 2.782 | 2.153 | 0.317 | 10.474 |
| Copper | Cu (ppm) | 10.856 | 2.591 | 5.282 | 17.809 |
| Iron | Fe (wt%) | 1.877 | 0.314 | 1.052 | 2.894 |
| Mercury | Hg (ppm) | 0.026 | 0.019 | 0.010 | 0.118 |
| Magnesium | Mg (wt%) | 0.466 | 0.138 | 0.204 | 0.808 |
| Manganese | Mn (ppm) | 274.104 | 71.903 | 122.748 | 495.417 |
| Sodium | Na (wt%) | 0.491 | 0.286 | 0.031 | 1.179 |
| Phosphorus | P (wt%) | 0.044 | 0.010 | 0.021 | 0.071 |
| Lead | Pb (ppm) | 16.512 | 3.097 | 8.177 | 26.693 |
| Selenium | Se (ppm) | 0.192 | 0.050 | 0.100 | 0.389 |
| Titanium | Ti (wt%) | 0.243 | 0.049 | 0.050 | 0.360 |
| Zinc | Zn (ppm) | 49.798 | 9.426 | 30.039 | 78.698 |