| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.891 | 0.646 | 0.912 | 4.609 |
| Arsenic | As (ppm) | 2.917 | 1.217 | 1.213 | 8.920 |
| Calcium | Ca (wt%) | 0.098 | 0.048 | 0.029 | 0.293 |
| Copper | Cu (ppm) | 4.631 | 1.204 | 2.043 | 10.757 |
| Iron | Fe (wt%) | 0.994 | 0.503 | 0.427 | 3.075 |
| Mercury | Hg (ppm) | 0.015 | 0.005 | 0.010 | 0.039 |
| Magnesium | Mg (wt%) | 0.117 | 0.085 | 0.040 | 0.612 |
| Manganese | Mn (ppm) | 192.339 | 80.536 | 84.956 | 562.803 |
| Sodium | Na (wt%) | 0.228 | 0.104 | 0.063 | 0.618 |
| Phosphorus | P (wt%) | 0.016 | 0.008 | 0.005 | 0.077 |
| Lead | Pb (ppm) | 11.535 | 4.650 | 2.272 | 30.634 |
| Selenium | Se (ppm) | 0.204 | 0.087 | 0.101 | 0.593 |
| Titanium | Ti (wt%) | 0.257 | 0.025 | 0.180 | 0.352 |
| Zinc | Zn (ppm) | 20.282 | 8.286 | 11.095 | 70.483 |