| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.891 | 0.700 | 3.396 | 7.761 |
| Arsenic | As (ppm) | 12.700 | 2.557 | 4.509 | 16.947 |
| Calcium | Ca (wt%) | 0.543 | 0.239 | 0.352 | 1.906 |
| Copper | Cu (ppm) | 18.949 | 11.410 | 6.150 | 89.427 |
| Iron | Fe (wt%) | 3.115 | 0.380 | 2.172 | 4.511 |
| Mercury | Hg (ppm) | 0.031 | 0.020 | 0.010 | 0.118 |
| Magnesium | Mg (wt%) | 0.553 | 0.147 | 0.328 | 1.105 |
| Manganese | Mn (ppm) | 757.105 | 151.102 | 300.472 | 1040.510 |
| Sodium | Na (wt%) | 0.717 | 0.079 | 0.439 | 0.908 |
| Phosphorus | P (wt%) | 0.052 | 0.005 | 0.037 | 0.064 |
| Lead | Pb (ppm) | 19.198 | 2.241 | 12.137 | 23.853 |
| Selenium | Se (ppm) | 0.161 | 0.078 | 0.100 | 0.411 |
| Titanium | Ti (wt%) | 0.434 | 0.061 | 0.286 | 0.861 |
| Zinc | Zn (ppm) | 92.537 | 11.213 | 57.996 | 130.527 |