| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.333 | 0.722 | 2.952 | 6.830 |
| Arsenic | As (ppm) | 4.617 | 1.013 | 2.510 | 8.979 |
| Calcium | Ca (wt%) | 0.567 | 0.283 | 0.161 | 1.367 |
| Copper | Cu (ppm) | 12.017 | 2.441 | 7.031 | 23.541 |
| Iron | Fe (wt%) | 1.545 | 0.336 | 0.955 | 2.813 |
| Mercury | Hg (ppm) | 0.044 | 0.012 | 0.020 | 0.078 |
| Magnesium | Mg (wt%) | 0.424 | 0.160 | 0.153 | 0.853 |
| Manganese | Mn (ppm) | 366.424 | 98.528 | 183.793 | 655.785 |
| Sodium | Na (wt%) | 0.734 | 0.097 | 0.422 | 0.938 |
| Phosphorus | P (wt%) | 0.046 | 0.014 | 0.021 | 0.086 |
| Lead | Pb (ppm) | 20.700 | 5.268 | 12.037 | 42.509 |
| Selenium | Se (ppm) | 0.305 | 0.087 | 0.101 | 0.650 |
| Titanium | Ti (wt%) | 0.259 | 0.029 | 0.180 | 0.326 |
| Zinc | Zn (ppm) | 56.687 | 24.283 | 25.529 | 157.885 |