| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.336 | 0.286 | 4.241 | 5.992 |
| Arsenic | As (ppm) | 0.752 | 0.227 | 0.300 | 1.528 |
| Calcium | Ca (wt%) | 1.163 | 0.198 | 0.722 | 1.849 |
| Copper | Cu (ppm) | 6.645 | 1.224 | 3.351 | 10.689 |
| Iron | Fe (wt%) | 1.590 | 0.288 | 0.909 | 3.020 |
| Mercury | Hg (ppm) | 0.064 | 0.019 | 0.042 | 0.151 |
| Magnesium | Mg (wt%) | 0.205 | 0.061 | 0.114 | 0.368 |
| Manganese | Mn (ppm) | 589.131 | 125.085 | 308.909 | 1126.550 |
| Sodium | Na (wt%) | 1.877 | 0.135 | 1.459 | 2.317 |
| Phosphorus | P (wt%) | 0.041 | 0.010 | 0.024 | 0.071 |
| Lead | Pb (ppm) | 31.494 | 5.972 | 17.853 | 53.104 |
| Selenium | Se (ppm) | 0.465 | 0.168 | 0.142 | 1.379 |
| Titanium | Ti (wt%) | 0.449 | 0.069 | 0.290 | 0.693 |
| Zinc | Zn (ppm) | 46.130 | 14.141 | 19.648 | 126.109 |