| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.642 | 0.564 | 0.849 | 4.643 |
| Arsenic | As (ppm) | 4.983 | 0.945 | 2.090 | 9.300 |
| Calcium | Ca (wt%) | 0.072 | 0.016 | 0.024 | 0.147 |
| Copper | Cu (ppm) | 4.982 | 1.039 | 1.172 | 8.353 |
| Iron | Fe (wt%) | 1.386 | 0.241 | 0.642 | 2.325 |
| Mercury | Hg (ppm) | 0.029 | 0.009 | 0.011 | 0.097 |
| Magnesium | Mg (wt%) | 0.120 | 0.029 | 0.040 | 0.264 |
| Manganese | Mn (ppm) | 279.324 | 99.363 | 109.150 | 1025.130 |
| Sodium | Na (wt%) | 0.165 | 0.036 | 0.045 | 0.266 |
| Phosphorus | P (wt%) | 0.016 | 0.003 | 0.008 | 0.038 |
| Lead | Pb (ppm) | 12.091 | 3.055 | 7.350 | 28.514 |
| Selenium | Se (ppm) | 0.268 | 0.075 | 0.104 | 0.848 |
| Titanium | Ti (wt%) | 0.393 | 0.040 | 0.264 | 0.527 |
| Zinc | Zn (ppm) | 29.555 | 4.841 | 13.761 | 49.668 |