| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.048 | 0.506 | 5.149 | 7.537 |
| Arsenic | As (ppm) | 9.567 | 3.848 | 3.155 | 23.299 |
| Calcium | Ca (wt%) | 1.122 | 0.210 | 0.749 | 1.768 |
| Copper | Cu (ppm) | 14.140 | 3.398 | 8.893 | 29.167 |
| Iron | Fe (wt%) | 2.578 | 0.312 | 1.747 | 3.725 |
| Mercury | Hg (ppm) | 0.050 | 0.014 | 0.014 | 0.127 |
| Magnesium | Mg (wt%) | 0.739 | 0.103 | 0.532 | 1.281 |
| Manganese | Mn (ppm) | 777.806 | 162.298 | 521.962 | 1546.040 |
| Sodium | Na (wt%) | 1.329 | 0.096 | 1.101 | 1.589 |
| Phosphorus | P (wt%) | 0.064 | 0.011 | 0.028 | 0.103 |
| Lead | Pb (ppm) | 43.690 | 9.392 | 29.595 | 81.842 |
| Selenium | Se (ppm) | 0.376 | 0.173 | 0.115 | 1.109 |
| Titanium | Ti (wt%) | 0.427 | 0.040 | 0.346 | 0.634 |
| Zinc | Zn (ppm) | 63.365 | 18.296 | 34.657 | 150.037 |