| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.806 | 0.454 | 3.751 | 5.764 |
| Arsenic | As (ppm) | 6.704 | 3.847 | 3.173 | 23.078 |
| Calcium | Ca (wt%) | 2.284 | 0.597 | 1.236 | 5.981 |
| Copper | Cu (ppm) | 11.972 | 1.988 | 6.193 | 16.818 |
| Iron | Fe (wt%) | 2.133 | 0.381 | 1.464 | 3.494 |
| Mercury | Hg (ppm) | 0.013 | 0.007 | 0.010 | 0.055 |
| Magnesium | Mg (wt%) | 0.927 | 0.084 | 0.724 | 1.462 |
| Manganese | Mn (ppm) | 426.268 | 47.303 | 314.717 | 531.489 |
| Sodium | Na (wt%) | 0.885 | 0.060 | 0.716 | 1.060 |
| Phosphorus | P (wt%) | 0.091 | 0.016 | 0.075 | 0.188 |
| Lead | Pb (ppm) | 22.652 | 5.597 | 12.328 | 47.936 |
| Selenium | Se (ppm) | 0.179 | 0.093 | 0.100 | 0.660 |
| Titanium | Ti (wt%) | 0.262 | 0.042 | 0.174 | 0.381 |
| Zinc | Zn (ppm) | 67.417 | 10.140 | 45.924 | 115.399 |