| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.427 | 0.332 | 4.278 | 6.403 |
| Arsenic | As (ppm) | 8.383 | 0.952 | 4.696 | 11.897 |
| Calcium | Ca (wt%) | 1.780 | 0.438 | 0.871 | 3.627 |
| Copper | Cu (ppm) | 24.903 | 7.857 | 10.796 | 60.845 |
| Iron | Fe (wt%) | 2.224 | 0.147 | 1.651 | 2.885 |
| Mercury | Hg (ppm) | 0.027 | 0.007 | 0.011 | 0.066 |
| Magnesium | Mg (wt%) | 0.892 | 0.159 | 0.551 | 1.528 |
| Manganese | Mn (ppm) | 460.749 | 168.287 | 238.822 | 1387.330 |
| Sodium | Na (wt%) | 0.879 | 0.085 | 0.584 | 1.155 |
| Phosphorus | P (wt%) | 0.064 | 0.010 | 0.045 | 0.104 |
| Lead | Pb (ppm) | 14.749 | 2.593 | 9.116 | 32.377 |
| Selenium | Se (ppm) | 0.790 | 0.942 | 0.207 | 8.357 |
| Titanium | Ti (wt%) | 0.245 | 0.019 | 0.171 | 0.312 |
| Zinc | Zn (ppm) | 71.508 | 6.328 | 50.870 | 92.579 |