| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.391 | 0.670 | 4.929 | 9.389 |
| Arsenic | As (ppm) | 9.833 | 5.834 | 2.146 | 34.971 |
| Calcium | Ca (wt%) | 1.174 | 0.927 | 0.194 | 7.771 |
| Copper | Cu (ppm) | 27.716 | 14.024 | 12.286 | 198.397 |
| Iron | Fe (wt%) | 2.655 | 0.479 | 1.670 | 7.421 |
| Mercury | Hg (ppm) | 0.080 | 0.120 | 0.020 | 1.575 |
| Magnesium | Mg (wt%) | 0.966 | 0.486 | 0.398 | 5.152 |
| Manganese | Mn (ppm) | 676.677 | 309.046 | 276.200 | 3172.940 |
| Sodium | Na (wt%) | 0.959 | 0.202 | 0.326 | 2.393 |
| Phosphorus | P (wt%) | 0.064 | 0.020 | 0.031 | 0.164 |
| Lead | Pb (ppm) | 90.176 | 325.144 | 15.036 | 4427.760 |
| Selenium | Se (ppm) | 0.322 | 0.166 | 0.100 | 1.214 |
| Titanium | Ti (wt%) | 0.320 | 0.060 | 0.190 | 0.564 |
| Zinc | Zn (ppm) | 108.876 | 118.035 | 37.070 | 1505.880 |