| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.048 | 0.377 | 0.350 | 2.737 |
| Arsenic | As (ppm) | 2.735 | 1.051 | 0.925 | 9.127 |
| Calcium | Ca (wt%) | 0.032 | 0.013 | 0.012 | 0.110 |
| Copper | Cu (ppm) | 3.276 | 0.873 | 1.028 | 6.730 |
| Iron | Fe (wt%) | 0.847 | 0.275 | 0.312 | 2.081 |
| Mercury | Hg (ppm) | 0.022 | 0.032 | 0.010 | 0.331 |
| Magnesium | Mg (wt%) | 0.027 | 0.009 | 0.012 | 0.076 |
| Manganese | Mn (ppm) | 194.428 | 105.307 | 44.676 | 1304.790 |
| Sodium | Na (wt%) | 0.026 | 0.023 | 0.004 | 0.144 |
| Phosphorus | P (wt%) | 0.020 | 0.005 | 0.006 | 0.036 |
| Lead | Pb (ppm) | 12.959 | 3.057 | 2.493 | 24.210 |
| Selenium | Se (ppm) | 0.211 | 0.115 | 0.100 | 0.927 |
| Titanium | Ti (wt%) | 0.470 | 0.102 | 0.165 | 0.872 |
| Zinc | Zn (ppm) | 12.430 | 2.964 | 4.321 | 24.594 |