| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.373 | 0.514 | 3.048 | 5.399 |
| Arsenic | As (ppm) | 4.808 | 1.609 | 2.245 | 16.298 |
| Calcium | Ca (wt%) | 2.311 | 1.112 | 0.580 | 6.142 |
| Copper | Cu (ppm) | 10.021 | 2.376 | 3.035 | 15.743 |
| Iron | Fe (wt%) | 1.783 | 0.274 | 1.147 | 2.403 |
| Mercury | Hg (ppm) | 0.020 | 0.009 | 0.010 | 0.067 |
| Magnesium | Mg (wt%) | 0.479 | 0.094 | 0.276 | 0.692 |
| Manganese | Mn (ppm) | 300.236 | 60.778 | 148.191 | 469.795 |
| Sodium | Na (wt%) | 0.609 | 0.073 | 0.367 | 0.768 |
| Phosphorus | P (wt%) | 0.036 | 0.007 | 0.020 | 0.069 |
| Lead | Pb (ppm) | 19.748 | 2.407 | 12.306 | 25.636 |
| Selenium | Se (ppm) | 0.291 | 0.109 | 0.101 | 0.872 |
| Titanium | Ti (wt%) | 0.220 | 0.025 | 0.168 | 0.282 |
| Zinc | Zn (ppm) | 44.809 | 10.690 | 21.764 | 82.353 |