| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.079 | 0.551 | 2.337 | 5.351 |
| Arsenic | As (ppm) | 8.603 | 3.616 | 2.622 | 22.365 |
| Calcium | Ca (wt%) | 5.862 | 3.151 | 1.383 | 17.512 |
| Copper | Cu (ppm) | 14.764 | 2.135 | 10.187 | 24.319 |
| Iron | Fe (wt%) | 1.792 | 0.256 | 0.975 | 2.431 |
| Mercury | Hg (ppm) | 0.014 | 0.005 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.591 | 0.119 | 0.233 | 1.305 |
| Manganese | Mn (ppm) | 316.130 | 56.170 | 154.680 | 485.390 |
| Sodium | Na (wt%) | 0.295 | 0.062 | 0.143 | 0.535 |
| Phosphorus | P (wt%) | 0.045 | 0.011 | 0.013 | 0.071 |
| Lead | Pb (ppm) | 15.897 | 5.070 | 9.192 | 38.779 |
| Selenium | Se (ppm) | 0.168 | 0.052 | 0.102 | 0.502 |
| Titanium | Ti (wt%) | 0.241 | 0.027 | 0.166 | 0.304 |
| Zinc | Zn (ppm) | 108.537 | 105.362 | 28.603 | 662.215 |