| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.063 | 0.846 | 2.720 | 7.777 |
| Arsenic | As (ppm) | 9.324 | 1.666 | 4.565 | 15.897 |
| Calcium | Ca (wt%) | 0.451 | 0.070 | 0.255 | 0.806 |
| Copper | Cu (ppm) | 11.860 | 2.772 | 5.073 | 21.458 |
| Iron | Fe (wt%) | 1.996 | 0.501 | 1.094 | 3.785 |
| Mercury | Hg (ppm) | 0.032 | 0.010 | 0.010 | 0.072 |
| Magnesium | Mg (wt%) | 0.442 | 0.130 | 0.165 | 0.881 |
| Manganese | Mn (ppm) | 494.444 | 111.573 | 261.015 | 960.085 |
| Sodium | Na (wt%) | 0.652 | 0.110 | 0.317 | 0.919 |
| Phosphorus | P (wt%) | 0.055 | 0.010 | 0.030 | 0.087 |
| Lead | Pb (ppm) | 19.359 | 3.122 | 8.298 | 30.365 |
| Selenium | Se (ppm) | 0.525 | 0.234 | 0.201 | 1.267 |
| Titanium | Ti (wt%) | 0.312 | 0.025 | 0.226 | 0.392 |
| Zinc | Zn (ppm) | 63.399 | 13.458 | 33.231 | 102.708 |