| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.999 | 0.443 | 4.151 | 6.500 |
| Arsenic | As (ppm) | 10.475 | 1.572 | 7.176 | 17.466 |
| Calcium | Ca (wt%) | 0.478 | 0.094 | 0.313 | 0.842 |
| Copper | Cu (ppm) | 12.064 | 1.765 | 8.337 | 17.542 |
| Iron | Fe (wt%) | 1.873 | 0.279 | 1.221 | 2.805 |
| Mercury | Hg (ppm) | 0.028 | 0.008 | 0.012 | 0.063 |
| Magnesium | Mg (wt%) | 0.426 | 0.072 | 0.276 | 0.654 |
| Manganese | Mn (ppm) | 417.872 | 90.279 | 220.583 | 837.201 |
| Sodium | Na (wt%) | 0.703 | 0.046 | 0.533 | 0.844 |
| Phosphorus | P (wt%) | 0.053 | 0.006 | 0.038 | 0.082 |
| Lead | Pb (ppm) | 18.823 | 2.804 | 13.789 | 32.257 |
| Selenium | Se (ppm) | 0.406 | 0.074 | 0.214 | 0.675 |
| Titanium | Ti (wt%) | 0.301 | 0.013 | 0.263 | 0.339 |
| Zinc | Zn (ppm) | 59.925 | 10.994 | 34.779 | 111.461 |