| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.954 | 0.784 | 2.956 | 6.890 |
| Arsenic | As (ppm) | 5.843 | 1.391 | 2.103 | 9.435 |
| Calcium | Ca (wt%) | 1.419 | 0.344 | 0.444 | 2.365 |
| Copper | Cu (ppm) | 12.325 | 1.992 | 6.519 | 17.684 |
| Iron | Fe (wt%) | 2.132 | 0.437 | 1.079 | 3.385 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.011 |
| Magnesium | Mg (wt%) | 1.035 | 0.372 | 0.220 | 2.076 |
| Manganese | Mn (ppm) | 531.261 | 65.031 | 313.690 | 663.986 |
| Sodium | Na (wt%) | 0.873 | 0.121 | 0.461 | 1.219 |
| Phosphorus | P (wt%) | 0.040 | 0.009 | 0.015 | 0.059 |
| Lead | Pb (ppm) | 23.662 | 4.261 | 12.069 | 40.450 |
| Selenium | Se (ppm) | 0.208 | 0.047 | 0.100 | 0.297 |
| Titanium | Ti (wt%) | 0.320 | 0.029 | 0.241 | 0.378 |
| Zinc | Zn (ppm) | 44.017 | 10.922 | 16.838 | 73.734 |