| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.238 | 0.367 | 2.479 | 4.567 |
| Arsenic | As (ppm) | 5.977 | 1.741 | 2.321 | 14.106 |
| Calcium | Ca (wt%) | 0.100 | 0.033 | 0.007 | 0.187 |
| Copper | Cu (ppm) | 3.806 | 1.442 | 1.028 | 8.846 |
| Iron | Fe (wt%) | 1.713 | 0.323 | 0.782 | 3.192 |
| Mercury | Hg (ppm) | 0.048 | 0.010 | 0.031 | 0.100 |
| Magnesium | Mg (wt%) | 0.299 | 0.049 | 0.169 | 0.406 |
| Manganese | Mn (ppm) | 1347.330 | 1241.410 | 380.800 | 8692.700 |
| Sodium | Na (wt%) | 0.423 | 0.129 | 0.160 | 0.692 |
| Phosphorus | P (wt%) | 0.039 | 0.008 | 0.025 | 0.075 |
| Lead | Pb (ppm) | 23.517 | 8.193 | 12.689 | 71.536 |
| Selenium | Se (ppm) | 0.241 | 0.093 | 0.102 | 0.794 |
| Titanium | Ti (wt%) | 0.231 | 0.029 | 0.153 | 0.312 |
| Zinc | Zn (ppm) | 77.337 | 29.432 | 45.439 | 251.313 |