| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.303 | 0.220 | 0.014 | 1.338 |
| Arsenic | As (ppm) | 1.110 | 0.331 | 0.375 | 2.612 |
| Calcium | Ca (wt%) | 0.140 | 0.095 | 0.010 | 0.637 |
| Copper | Cu (ppm) | 1.680 | 0.765 | 1.011 | 5.574 |
| Iron | Fe (wt%) | 0.351 | 0.239 | 0.051 | 1.830 |
| Mercury | Hg (ppm) | 0.016 | 0.009 | 0.010 | 0.050 |
| Magnesium | Mg (wt%) | 0.011 | 0.007 | 0.003 | 0.042 |
| Manganese | Mn (ppm) | 100.605 | 66.285 | 18.564 | 512.972 |
| Sodium | Na (wt%) | 0.010 | 0.015 | 0.003 | 0.128 |
| Phosphorus | P (wt%) | 0.008 | 0.006 | 0.003 | 0.035 |
| Lead | Pb (ppm) | 16.253 | 5.330 | 9.110 | 40.883 |
| Selenium | Se (ppm) | 0.163 | 0.066 | 0.101 | 0.551 |
| Titanium | Ti (wt%) | 0.411 | 0.083 | 0.266 | 0.773 |
| Zinc | Zn (ppm) | 7.065 | 3.118 | 1.088 | 18.922 |