| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.719 | 0.300 | 4.077 | 5.405 |
| Arsenic | As (ppm) | 3.618 | 1.067 | 1.709 | 6.078 |
| Calcium | Ca (wt%) | 1.869 | 0.688 | 0.999 | 3.649 |
| Copper | Cu (ppm) | 12.224 | 5.387 | 4.479 | 27.969 |
| Iron | Fe (wt%) | 2.765 | 0.380 | 1.772 | 3.504 |
| Mercury | Hg (ppm) | 0.027 | 0.009 | 0.010 | 0.050 |
| Magnesium | Mg (wt%) | 0.885 | 0.188 | 0.644 | 1.455 |
| Manganese | Mn (ppm) | 720.569 | 104.803 | 358.645 | 875.258 |
| Sodium | Na (wt%) | 1.345 | 0.054 | 1.230 | 1.481 |
| Phosphorus | P (wt%) | 0.076 | 0.008 | 0.062 | 0.100 |
| Lead | Pb (ppm) | 17.616 | 3.579 | 11.509 | 28.570 |
| Selenium | Se (ppm) | 0.206 | 0.072 | 0.107 | 0.400 |
| Titanium | Ti (wt%) | 0.484 | 0.114 | 0.286 | 0.807 |
| Zinc | Zn (ppm) | 85.382 | 8.861 | 65.650 | 107.942 |