| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.846 | 0.632 | 4.279 | 7.270 |
| Arsenic | As (ppm) | 12.524 | 2.346 | 7.359 | 28.530 |
| Calcium | Ca (wt%) | 0.532 | 0.176 | 0.222 | 0.944 |
| Copper | Cu (ppm) | 24.702 | 9.842 | 10.562 | 74.805 |
| Iron | Fe (wt%) | 3.212 | 0.266 | 2.572 | 3.967 |
| Mercury | Hg (ppm) | 0.043 | 0.010 | 0.014 | 0.060 |
| Magnesium | Mg (wt%) | 0.556 | 0.043 | 0.454 | 0.681 |
| Manganese | Mn (ppm) | 660.674 | 210.173 | 264.329 | 1341.700 |
| Sodium | Na (wt%) | 0.833 | 0.110 | 0.567 | 1.148 |
| Phosphorus | P (wt%) | 0.046 | 0.007 | 0.036 | 0.068 |
| Lead | Pb (ppm) | 19.289 | 4.611 | 12.921 | 30.000 |
| Selenium | Se (ppm) | 0.311 | 0.054 | 0.145 | 0.396 |
| Titanium | Ti (wt%) | 0.387 | 0.008 | 0.365 | 0.417 |
| Zinc | Zn (ppm) | 89.229 | 13.313 | 47.112 | 116.835 |