| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.202 | 0.595 | 3.569 | 7.900 |
| Arsenic | As (ppm) | 4.290 | 0.949 | 1.208 | 8.576 |
| Calcium | Ca (wt%) | 2.515 | 0.754 | 0.725 | 9.431 |
| Copper | Cu (ppm) | 11.892 | 4.628 | 1.402 | 42.968 |
| Iron | Fe (wt%) | 3.209 | 0.560 | 1.798 | 6.030 |
| Mercury | Hg (ppm) | 0.030 | 0.017 | 0.010 | 0.183 |
| Magnesium | Mg (wt%) | 0.739 | 0.227 | 0.355 | 1.632 |
| Manganese | Mn (ppm) | 552.957 | 97.516 | 287.759 | 1510.160 |
| Sodium | Na (wt%) | 1.096 | 0.183 | 0.559 | 1.973 |
| Phosphorus | P (wt%) | 0.055 | 0.013 | 0.030 | 0.198 |
| Lead | Pb (ppm) | 22.446 | 6.818 | 10.060 | 84.316 |
| Selenium | Se (ppm) | 0.150 | 0.072 | 0.100 | 1.029 |
| Titanium | Ti (wt%) | 0.406 | 0.079 | 0.209 | 0.817 |
| Zinc | Zn (ppm) | 57.739 | 10.659 | 25.184 | 108.991 |