| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.847 | 0.527 | 4.014 | 8.114 |
| Arsenic | As (ppm) | 6.295 | 9.346 | 1.402 | 85.805 |
| Calcium | Ca (wt%) | 1.494 | 0.859 | 0.353 | 5.592 |
| Copper | Cu (ppm) | 12.328 | 3.484 | 6.075 | 31.430 |
| Iron | Fe (wt%) | 3.288 | 0.661 | 1.910 | 6.662 |
| Mercury | Hg (ppm) | 0.038 | 0.012 | 0.010 | 0.090 |
| Magnesium | Mg (wt%) | 0.731 | 0.333 | 0.239 | 1.680 |
| Manganese | Mn (ppm) | 786.175 | 278.582 | 331.305 | 1936.150 |
| Sodium | Na (wt%) | 1.194 | 0.199 | 0.816 | 2.030 |
| Phosphorus | P (wt%) | 0.082 | 0.016 | 0.052 | 0.151 |
| Lead | Pb (ppm) | 32.482 | 8.932 | 12.282 | 91.799 |
| Selenium | Se (ppm) | 0.143 | 0.064 | 0.100 | 0.456 |
| Titanium | Ti (wt%) | 0.723 | 0.144 | 0.335 | 1.382 |
| Zinc | Zn (ppm) | 54.326 | 15.454 | 28.637 | 131.450 |