| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.255 | 1.183 | 1.908 | 6.594 |
| Arsenic | As (ppm) | 5.451 | 1.600 | 2.017 | 8.664 |
| Calcium | Ca (wt%) | 3.737 | 1.470 | 0.803 | 6.296 |
| Copper | Cu (ppm) | 15.377 | 2.993 | 10.067 | 20.804 |
| Iron | Fe (wt%) | 1.839 | 0.535 | 0.776 | 2.900 |
| Mercury | Hg (ppm) | 0.013 | 0.004 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.996 | 0.673 | 0.265 | 2.522 |
| Manganese | Mn (ppm) | 405.083 | 86.443 | 267.024 | 570.708 |
| Sodium | Na (wt%) | 0.311 | 0.119 | 0.134 | 0.550 |
| Phosphorus | P (wt%) | 0.033 | 0.009 | 0.015 | 0.050 |
| Lead | Pb (ppm) | 15.766 | 2.665 | 11.022 | 20.621 |
| Selenium | Se (ppm) | 0.167 | 0.069 | 0.100 | 0.395 |
| Titanium | Ti (wt%) | 0.232 | 0.049 | 0.128 | 0.315 |
| Zinc | Zn (ppm) | 43.314 | 12.997 | 18.114 | 73.479 |