| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.972 | 0.804 | 1.708 | 7.339 |
| Arsenic | As (ppm) | 5.526 | 1.399 | 1.782 | 8.959 |
| Calcium | Ca (wt%) | 0.532 | 0.323 | 0.077 | 1.708 |
| Copper | Cu (ppm) | 13.802 | 2.979 | 2.046 | 22.976 |
| Iron | Fe (wt%) | 3.511 | 1.030 | 1.116 | 8.498 |
| Mercury | Hg (ppm) | 0.057 | 0.021 | 0.025 | 0.164 |
| Magnesium | Mg (wt%) | 0.517 | 0.142 | 0.123 | 0.951 |
| Manganese | Mn (ppm) | 944.655 | 343.432 | 177.680 | 2712.910 |
| Sodium | Na (wt%) | 0.537 | 0.297 | 0.095 | 1.993 |
| Phosphorus | P (wt%) | 0.049 | 0.013 | 0.017 | 0.085 |
| Lead | Pb (ppm) | 30.013 | 7.886 | 11.067 | 112.502 |
| Selenium | Se (ppm) | 0.542 | 0.198 | 0.102 | 1.295 |
| Titanium | Ti (wt%) | 0.491 | 0.145 | 0.242 | 1.052 |
| Zinc | Zn (ppm) | 90.840 | 14.352 | 24.248 | 150.769 |