| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 1.871 | 0.570 | 0.805 | 3.439 |
| Arsenic | As (ppm) | 4.267 | 1.268 | 0.875 | 7.921 |
| Calcium | Ca (wt%) | 2.607 | 1.904 | 0.074 | 8.493 |
| Copper | Cu (ppm) | 5.622 | 1.665 | 2.051 | 9.555 |
| Iron | Fe (wt%) | 1.264 | 0.395 | 0.222 | 2.148 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.011 |
| Magnesium | Mg (wt%) | 0.164 | 0.041 | 0.031 | 0.252 |
| Manganese | Mn (ppm) | 464.475 | 201.449 | 69.664 | 1125.380 |
| Sodium | Na (wt%) | 0.138 | 0.045 | 0.065 | 0.281 |
| Phosphorus | P (wt%) | 0.021 | 0.009 | 0.005 | 0.049 |
| Lead | Pb (ppm) | 11.161 | 3.530 | 2.538 | 25.983 |
| Selenium | Se (ppm) | 0.136 | 0.030 | 0.101 | 0.243 |
| Titanium | Ti (wt%) | 0.183 | 0.060 | 0.062 | 0.306 |
| Zinc | Zn (ppm) | 28.202 | 11.328 | 4.462 | 55.499 |