| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.757 | 0.330 | 3.895 | 5.479 |
| Arsenic | As (ppm) | 2.551 | 0.913 | 0.621 | 4.758 |
| Calcium | Ca (wt%) | 1.269 | 0.232 | 0.734 | 1.713 |
| Copper | Cu (ppm) | 14.608 | 4.533 | 7.691 | 29.262 |
| Iron | Fe (wt%) | 2.200 | 0.284 | 1.443 | 2.913 |
| Mercury | Hg (ppm) | 0.078 | 0.018 | 0.041 | 0.147 |
| Magnesium | Mg (wt%) | 0.400 | 0.089 | 0.233 | 0.637 |
| Manganese | Mn (ppm) | 707.805 | 132.915 | 487.073 | 1255.650 |
| Sodium | Na (wt%) | 1.562 | 0.120 | 1.183 | 2.033 |
| Phosphorus | P (wt%) | 0.042 | 0.009 | 0.023 | 0.068 |
| Lead | Pb (ppm) | 105.708 | 57.558 | 34.868 | 321.852 |
| Selenium | Se (ppm) | 0.152 | 0.047 | 0.101 | 0.307 |
| Titanium | Ti (wt%) | 0.628 | 0.090 | 0.382 | 0.910 |
| Zinc | Zn (ppm) | 50.868 | 14.558 | 25.349 | 99.456 |