| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.412 | 0.796 | 3.731 | 11.873 |
| Arsenic | As (ppm) | 8.060 | 3.862 | 0.736 | 28.536 |
| Calcium | Ca (wt%) | 0.814 | 0.421 | 0.206 | 2.881 |
| Copper | Cu (ppm) | 10.620 | 5.309 | 4.026 | 53.607 |
| Iron | Fe (wt%) | 2.895 | 0.461 | 1.115 | 5.826 |
| Mercury | Hg (ppm) | 0.045 | 0.066 | 0.010 | 1.266 |
| Magnesium | Mg (wt%) | 0.819 | 0.219 | 0.302 | 2.918 |
| Manganese | Mn (ppm) | 1027.250 | 429.055 | 287.393 | 3433.720 |
| Sodium | Na (wt%) | 1.259 | 0.172 | 0.652 | 1.932 |
| Phosphorus | P (wt%) | 0.050 | 0.009 | 0.013 | 0.083 |
| Lead | Pb (ppm) | 18.156 | 8.227 | 7.563 | 92.464 |
| Selenium | Se (ppm) | 0.136 | 0.044 | 0.100 | 0.298 |
| Titanium | Ti (wt%) | 0.442 | 0.184 | 0.212 | 1.418 |
| Zinc | Zn (ppm) | 67.940 | 16.467 | 15.769 | 124.622 |