| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.236 | 0.294 | 5.348 | 7.714 |
| Arsenic | As (ppm) | 14.825 | 4.656 | 8.338 | 35.126 |
| Calcium | Ca (wt%) | 0.902 | 0.379 | 0.441 | 3.125 |
| Copper | Cu (ppm) | 20.080 | 4.487 | 11.423 | 42.153 |
| Iron | Fe (wt%) | 3.775 | 0.281 | 2.799 | 4.733 |
| Mercury | Hg (ppm) | 0.055 | 0.017 | 0.031 | 0.139 |
| Magnesium | Mg (wt%) | 0.626 | 0.078 | 0.463 | 0.816 |
| Manganese | Mn (ppm) | 784.132 | 98.588 | 506.973 | 1051.880 |
| Sodium | Na (wt%) | 0.479 | 0.044 | 0.338 | 0.602 |
| Phosphorus | P (wt%) | 0.059 | 0.011 | 0.040 | 0.097 |
| Lead | Pb (ppm) | 29.773 | 3.502 | 22.807 | 40.108 |
| Selenium | Se (ppm) | 0.776 | 0.290 | 0.390 | 2.652 |
| Titanium | Ti (wt%) | 0.325 | 0.019 | 0.267 | 0.358 |
| Zinc | Zn (ppm) | 81.199 | 8.415 | 67.626 | 122.194 |