| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.910 | 0.372 | 5.936 | 8.048 |
| Arsenic | As (ppm) | 5.666 | 1.707 | 2.523 | 12.227 |
| Calcium | Ca (wt%) | 1.797 | 0.273 | 1.162 | 3.110 |
| Copper | Cu (ppm) | 13.129 | 4.697 | 2.036 | 26.486 |
| Iron | Fe (wt%) | 3.454 | 0.655 | 2.162 | 5.961 |
| Mercury | Hg (ppm) | 0.023 | 0.011 | 0.010 | 0.058 |
| Magnesium | Mg (wt%) | 0.742 | 0.078 | 0.568 | 0.967 |
| Manganese | Mn (ppm) | 733.881 | 204.631 | 391.647 | 1744.290 |
| Sodium | Na (wt%) | 1.549 | 0.151 | 1.234 | 2.232 |
| Phosphorus | P (wt%) | 0.090 | 0.018 | 0.050 | 0.163 |
| Lead | Pb (ppm) | 28.803 | 11.215 | 18.052 | 90.292 |
| Selenium | Se (ppm) | 0.122 | 0.026 | 0.100 | 0.298 |
| Titanium | Ti (wt%) | 0.542 | 0.132 | 0.310 | 0.983 |
| Zinc | Zn (ppm) | 73.699 | 15.445 | 41.252 | 132.296 |