| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.137 | 0.380 | 0.489 | 3.062 |
| Arsenic | As (ppm) | 2.759 | 0.906 | 0.903 | 6.173 |
| Calcium | Ca (wt%) | 0.086 | 0.093 | 0.014 | 0.781 |
| Copper | Cu (ppm) | 4.245 | 1.192 | 1.307 | 9.548 |
| Iron | Fe (wt%) | 0.773 | 0.242 | 0.318 | 1.524 |
| Mercury | Hg (ppm) | 0.024 | 0.007 | 0.010 | 0.057 |
| Magnesium | Mg (wt%) | 0.064 | 0.027 | 0.022 | 0.181 |
| Manganese | Mn (ppm) | 200.308 | 121.634 | 55.668 | 985.637 |
| Sodium | Na (wt%) | 0.085 | 0.069 | 0.013 | 0.680 |
| Phosphorus | P (wt%) | 0.012 | 0.004 | 0.005 | 0.031 |
| Lead | Pb (ppm) | 9.273 | 4.344 | 2.595 | 33.401 |
| Selenium | Se (ppm) | 0.165 | 0.041 | 0.100 | 0.300 |
| Titanium | Ti (wt%) | 0.275 | 0.069 | 0.130 | 0.513 |
| Zinc | Zn (ppm) | 15.422 | 4.625 | 7.482 | 37.225 |