| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.571 | 0.598 | 0.604 | 3.844 |
| Arsenic | As (ppm) | 10.323 | 7.468 | 2.756 | 39.720 |
| Calcium | Ca (wt%) | 0.066 | 0.047 | 0.019 | 0.457 |
| Copper | Cu (ppm) | 3.727 | 1.140 | 1.113 | 7.956 |
| Iron | Fe (wt%) | 1.961 | 0.931 | 0.631 | 5.179 |
| Mercury | Hg (ppm) | 0.020 | 0.010 | 0.010 | 0.060 |
| Magnesium | Mg (wt%) | 0.064 | 0.024 | 0.022 | 0.154 |
| Manganese | Mn (ppm) | 184.141 | 91.064 | 75.269 | 515.840 |
| Sodium | Na (wt%) | 0.058 | 0.022 | 0.022 | 0.139 |
| Phosphorus | P (wt%) | 0.023 | 0.011 | 0.006 | 0.065 |
| Lead | Pb (ppm) | 10.599 | 2.396 | 5.219 | 17.930 |
| Selenium | Se (ppm) | 0.285 | 0.146 | 0.100 | 0.795 |
| Titanium | Ti (wt%) | 0.377 | 0.061 | 0.223 | 0.592 |
| Zinc | Zn (ppm) | 29.845 | 11.818 | 9.026 | 74.533 |