| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.706 | 1.272 | 2.245 | 7.194 |
| Arsenic | As (ppm) | 5.432 | 1.623 | 1.868 | 11.466 |
| Calcium | Ca (wt%) | 0.850 | 0.584 | 0.163 | 4.379 |
| Copper | Cu (ppm) | 13.300 | 4.435 | 1.019 | 33.250 |
| Iron | Fe (wt%) | 2.966 | 0.834 | 1.228 | 6.596 |
| Mercury | Hg (ppm) | 0.053 | 0.015 | 0.011 | 0.108 |
| Magnesium | Mg (wt%) | 0.591 | 0.229 | 0.215 | 1.717 |
| Manganese | Mn (ppm) | 767.430 | 254.584 | 397.876 | 1728.890 |
| Sodium | Na (wt%) | 1.051 | 0.408 | 0.217 | 1.821 |
| Phosphorus | P (wt%) | 0.047 | 0.013 | 0.015 | 0.108 |
| Lead | Pb (ppm) | 40.526 | 20.086 | 16.549 | 172.030 |
| Selenium | Se (ppm) | 0.417 | 0.121 | 0.105 | 0.694 |
| Titanium | Ti (wt%) | 0.464 | 0.165 | 0.200 | 0.910 |
| Zinc | Zn (ppm) | 87.067 | 23.588 | 38.666 | 169.106 |