| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.236 | 0.535 | 3.509 | 8.267 |
| Arsenic | As (ppm) | 6.375 | 2.138 | 2.809 | 14.975 |
| Calcium | Ca (wt%) | 3.060 | 0.584 | 1.126 | 6.699 |
| Copper | Cu (ppm) | 23.354 | 4.184 | 9.296 | 58.266 |
| Iron | Fe (wt%) | 3.854 | 0.961 | 1.760 | 14.158 |
| Mercury | Hg (ppm) | 0.022 | 0.010 | 0.010 | 0.099 |
| Magnesium | Mg (wt%) | 1.424 | 0.290 | 0.667 | 3.574 |
| Manganese | Mn (ppm) | 809.555 | 241.222 | 331.820 | 2953.040 |
| Sodium | Na (wt%) | 1.279 | 0.246 | 0.518 | 2.320 |
| Phosphorus | P (wt%) | 0.106 | 0.017 | 0.065 | 0.208 |
| Lead | Pb (ppm) | 16.679 | 2.498 | 9.142 | 29.585 |
| Selenium | Se (ppm) | 0.240 | 0.090 | 0.100 | 0.575 |
| Titanium | Ti (wt%) | 0.402 | 0.095 | 0.206 | 1.431 |
| Zinc | Zn (ppm) | 80.810 | 11.809 | 38.370 | 218.783 |