| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.326 | 0.665 | 4.356 | 7.007 |
| Arsenic | As (ppm) | 7.007 | 1.109 | 5.316 | 9.548 |
| Calcium | Ca (wt%) | 3.370 | 1.575 | 1.080 | 7.919 |
| Copper | Cu (ppm) | 13.595 | 3.088 | 8.311 | 21.987 |
| Iron | Fe (wt%) | 2.894 | 0.464 | 2.133 | 4.517 |
| Mercury | Hg (ppm) | 0.013 | 0.005 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 1.210 | 0.253 | 0.601 | 1.712 |
| Manganese | Mn (ppm) | 521.360 | 60.426 | 373.504 | 659.790 |
| Sodium | Na (wt%) | 0.962 | 0.157 | 0.620 | 1.315 |
| Phosphorus | P (wt%) | 0.104 | 0.014 | 0.075 | 0.139 |
| Lead | Pb (ppm) | 25.421 | 5.879 | 18.017 | 42.509 |
| Selenium | Se (ppm) | 0.280 | 0.093 | 0.100 | 0.679 |
| Titanium | Ti (wt%) | 0.336 | 0.051 | 0.232 | 0.475 |
| Zinc | Zn (ppm) | 92.547 | 31.905 | 60.069 | 300.101 |