| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.022 | 0.553 | 1.055 | 4.263 |
| Arsenic | As (ppm) | 5.727 | 1.824 | 1.947 | 11.276 |
| Calcium | Ca (wt%) | 0.259 | 0.230 | 0.036 | 1.944 |
| Copper | Cu (ppm) | 8.781 | 2.983 | 1.357 | 15.930 |
| Iron | Fe (wt%) | 1.899 | 0.359 | 0.485 | 2.915 |
| Mercury | Hg (ppm) | 0.032 | 0.008 | 0.011 | 0.059 |
| Magnesium | Mg (wt%) | 0.249 | 0.071 | 0.052 | 0.450 |
| Manganese | Mn (ppm) | 577.299 | 240.412 | 135.896 | 1597.530 |
| Sodium | Na (wt%) | 0.143 | 0.078 | 0.021 | 0.498 |
| Phosphorus | P (wt%) | 0.028 | 0.007 | 0.007 | 0.058 |
| Lead | Pb (ppm) | 17.825 | 3.179 | 8.481 | 29.502 |
| Selenium | Se (ppm) | 0.232 | 0.115 | 0.101 | 0.864 |
| Titanium | Ti (wt%) | 0.252 | 0.040 | 0.064 | 0.328 |
| Zinc | Zn (ppm) | 59.399 | 16.565 | 25.085 | 128.143 |