| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.740 | 0.857 | 3.313 | 9.336 |
| Arsenic | As (ppm) | 6.441 | 1.531 | 2.707 | 9.822 |
| Calcium | Ca (wt%) | 3.246 | 2.282 | 0.686 | 11.791 |
| Copper | Cu (ppm) | 30.444 | 24.519 | 14.246 | 151.778 |
| Iron | Fe (wt%) | 3.438 | 0.837 | 2.006 | 7.631 |
| Mercury | Hg (ppm) | 0.028 | 0.009 | 0.011 | 0.050 |
| Magnesium | Mg (wt%) | 1.171 | 0.245 | 0.732 | 2.038 |
| Manganese | Mn (ppm) | 871.457 | 231.891 | 407.597 | 1469.040 |
| Sodium | Na (wt%) | 1.079 | 0.249 | 0.594 | 2.172 |
| Phosphorus | P (wt%) | 0.062 | 0.012 | 0.039 | 0.113 |
| Lead | Pb (ppm) | 10.012 | 1.680 | 6.268 | 13.299 |
| Selenium | Se (ppm) | 0.289 | 0.095 | 0.100 | 0.563 |
| Titanium | Ti (wt%) | 0.377 | 0.098 | 0.168 | 0.777 |
| Zinc | Zn (ppm) | 85.097 | 15.713 | 45.044 | 124.908 |