| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.080 | 0.302 | 4.371 | 5.728 |
| Arsenic | As (ppm) | 2.387 | 0.954 | 0.320 | 5.894 |
| Calcium | Ca (wt%) | 1.241 | 0.206 | 0.831 | 1.824 |
| Copper | Cu (ppm) | 9.993 | 5.303 | 4.034 | 28.747 |
| Iron | Fe (wt%) | 1.822 | 0.333 | 1.264 | 3.279 |
| Mercury | Hg (ppm) | 0.072 | 0.029 | 0.026 | 0.198 |
| Magnesium | Mg (wt%) | 0.305 | 0.087 | 0.140 | 0.662 |
| Manganese | Mn (ppm) | 683.146 | 178.350 | 440.974 | 1499.520 |
| Sodium | Na (wt%) | 1.548 | 0.178 | 0.991 | 1.923 |
| Phosphorus | P (wt%) | 0.069 | 0.033 | 0.032 | 0.217 |
| Lead | Pb (ppm) | 48.227 | 19.095 | 23.779 | 132.565 |
| Selenium | Se (ppm) | 0.367 | 0.120 | 0.103 | 0.819 |
| Titanium | Ti (wt%) | 0.428 | 0.051 | 0.267 | 0.578 |
| Zinc | Zn (ppm) | 62.332 | 24.937 | 18.265 | 158.774 |