| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.978 | 0.839 | 6.285 | 10.819 |
| Arsenic | As (ppm) | 7.965 | 4.345 | 0.321 | 26.507 |
| Calcium | Ca (wt%) | 2.346 | 1.040 | 0.641 | 5.055 |
| Copper | Cu (ppm) | 40.085 | 10.994 | 10.152 | 90.774 |
| Iron | Fe (wt%) | 6.244 | 1.032 | 2.902 | 10.864 |
| Mercury | Hg (ppm) | 0.046 | 0.016 | 0.010 | 0.123 |
| Magnesium | Mg (wt%) | 1.322 | 0.694 | 0.491 | 3.284 |
| Manganese | Mn (ppm) | 1333.140 | 345.647 | 548.785 | 2535.390 |
| Sodium | Na (wt%) | 1.637 | 0.540 | 0.708 | 2.851 |
| Phosphorus | P (wt%) | 0.094 | 0.029 | 0.036 | 0.184 |
| Lead | Pb (ppm) | 11.784 | 3.523 | 4.050 | 24.993 |
| Selenium | Se (ppm) | 0.158 | 0.064 | 0.100 | 0.500 |
| Titanium | Ti (wt%) | 0.882 | 0.178 | 0.345 | 1.738 |
| Zinc | Zn (ppm) | 110.981 | 18.627 | 63.055 | 170.967 |