| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.291 | 0.781 | 2.861 | 7.011 |
| Arsenic | As (ppm) | 7.766 | 2.176 | 3.500 | 19.963 |
| Calcium | Ca (wt%) | 3.471 | 1.050 | 0.879 | 6.985 |
| Copper | Cu (ppm) | 15.500 | 3.627 | 7.059 | 31.745 |
| Iron | Fe (wt%) | 2.348 | 0.363 | 1.357 | 3.979 |
| Mercury | Hg (ppm) | 0.029 | 0.011 | 0.010 | 0.050 |
| Magnesium | Mg (wt%) | 1.463 | 0.344 | 0.793 | 2.386 |
| Manganese | Mn (ppm) | 324.655 | 56.221 | 180.482 | 579.331 |
| Sodium | Na (wt%) | 0.701 | 0.217 | 0.278 | 1.468 |
| Phosphorus | P (wt%) | 0.058 | 0.008 | 0.035 | 0.085 |
| Lead | Pb (ppm) | 21.110 | 4.715 | 10.468 | 43.597 |
| Selenium | Se (ppm) | 0.463 | 0.241 | 0.101 | 1.568 |
| Titanium | Ti (wt%) | 0.210 | 0.041 | 0.110 | 0.348 |
| Zinc | Zn (ppm) | 57.737 | 12.479 | 29.147 | 115.961 |