| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.089 | 0.663 | 0.243 | 3.100 |
| Arsenic | As (ppm) | 3.220 | 1.937 | 0.810 | 7.600 |
| Calcium | Ca (wt%) | 0.077 | 0.042 | 0.022 | 0.199 |
| Copper | Cu (ppm) | 11.616 | 7.328 | 2.295 | 31.634 |
| Iron | Fe (wt%) | 0.738 | 0.371 | 0.228 | 1.480 |
| Mercury | Hg (ppm) | 0.009 | 0.003 | 0.005 | 0.019 |
| Magnesium | Mg (wt%) | 0.065 | 0.041 | 0.017 | 0.184 |
| Manganese | Mn (ppm) | 418.954 | 192.874 | 126.915 | 806.082 |
| Sodium | Na (wt%) | 0.140 | 0.114 | 0.011 | 0.508 |
| Phosphorus | P (wt%) | 0.018 | 0.011 | 0.003 | 0.040 |
| Lead | Pb (ppm) | 8.465 | 3.231 | 2.156 | 15.320 |
| Selenium | Se (ppm) | 0.118 | 0.019 | 0.100 | 0.194 |
| Titanium | Ti (wt%) | 0.211 | 0.072 | 0.085 | 0.482 |
| Zinc | Zn (ppm) | 15.713 | 6.401 | 4.841 | 29.858 |