| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.325 | 0.361 | 4.327 | 6.391 |
| Arsenic | As (ppm) | 10.187 | 3.186 | 3.177 | 34.015 |
| Calcium | Ca (wt%) | 0.744 | 0.202 | 0.302 | 1.136 |
| Copper | Cu (ppm) | 15.011 | 3.710 | 8.488 | 38.699 |
| Iron | Fe (wt%) | 2.594 | 0.282 | 1.773 | 3.432 |
| Mercury | Hg (ppm) | 0.049 | 0.026 | 0.011 | 0.222 |
| Magnesium | Mg (wt%) | 0.653 | 0.073 | 0.509 | 0.975 |
| Manganese | Mn (ppm) | 641.596 | 157.119 | 395.871 | 1351.270 |
| Sodium | Na (wt%) | 1.197 | 0.067 | 0.902 | 1.400 |
| Phosphorus | P (wt%) | 0.056 | 0.012 | 0.031 | 0.113 |
| Lead | Pb (ppm) | 34.528 | 5.491 | 22.835 | 62.542 |
| Selenium | Se (ppm) | 0.374 | 0.197 | 0.116 | 1.307 |
| Titanium | Ti (wt%) | 0.427 | 0.038 | 0.318 | 0.556 |
| Zinc | Zn (ppm) | 57.975 | 11.357 | 35.025 | 101.550 |