| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.295 | 0.781 | 0.619 | 3.680 |
| Arsenic | As (ppm) | 4.777 | 0.954 | 1.917 | 7.828 |
| Calcium | Ca (wt%) | 0.105 | 0.050 | 0.025 | 0.220 |
| Copper | Cu (ppm) | 5.800 | 1.201 | 3.108 | 9.301 |
| Iron | Fe (wt%) | 1.122 | 0.356 | 0.338 | 2.242 |
| Mercury | Hg (ppm) | 0.016 | 0.003 | 0.010 | 0.032 |
| Magnesium | Mg (wt%) | 0.168 | 0.081 | 0.028 | 0.428 |
| Manganese | Mn (ppm) | 226.624 | 54.451 | 76.514 | 336.084 |
| Sodium | Na (wt%) | 0.275 | 0.163 | 0.040 | 0.735 |
| Phosphorus | P (wt%) | 0.018 | 0.008 | 0.007 | 0.055 |
| Lead | Pb (ppm) | 12.246 | 3.676 | 6.460 | 20.626 |
| Selenium | Se (ppm) | 0.213 | 0.085 | 0.102 | 0.399 |
| Titanium | Ti (wt%) | 0.205 | 0.023 | 0.118 | 0.258 |
| Zinc | Zn (ppm) | 25.691 | 7.585 | 9.220 | 52.912 |