| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.951 | 0.323 | 3.948 | 5.810 |
| Arsenic | As (ppm) | 7.954 | 1.977 | 4.279 | 15.731 |
| Calcium | Ca (wt%) | 2.002 | 0.907 | 0.440 | 5.520 |
| Copper | Cu (ppm) | 14.759 | 3.120 | 7.143 | 20.806 |
| Iron | Fe (wt%) | 2.023 | 0.276 | 1.390 | 2.593 |
| Mercury | Hg (ppm) | 0.019 | 0.009 | 0.010 | 0.058 |
| Magnesium | Mg (wt%) | 1.580 | 0.652 | 0.589 | 4.037 |
| Manganese | Mn (ppm) | 352.304 | 48.293 | 278.770 | 537.800 |
| Sodium | Na (wt%) | 0.677 | 0.087 | 0.553 | 0.941 |
| Phosphorus | P (wt%) | 0.043 | 0.007 | 0.025 | 0.068 |
| Lead | Pb (ppm) | 21.766 | 3.473 | 16.101 | 34.737 |
| Selenium | Se (ppm) | 0.202 | 0.047 | 0.102 | 0.296 |
| Titanium | Ti (wt%) | 0.261 | 0.023 | 0.217 | 0.332 |
| Zinc | Zn (ppm) | 37.706 | 5.581 | 24.692 | 50.285 |