| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.262 | 0.533 | 2.882 | 5.539 |
| Arsenic | As (ppm) | 8.245 | 2.141 | 3.237 | 15.421 |
| Calcium | Ca (wt%) | 0.196 | 0.051 | 0.101 | 0.442 |
| Copper | Cu (ppm) | 10.120 | 2.983 | 4.471 | 24.235 |
| Iron | Fe (wt%) | 2.358 | 0.408 | 1.473 | 3.595 |
| Mercury | Hg (ppm) | 0.041 | 0.011 | 0.014 | 0.099 |
| Magnesium | Mg (wt%) | 0.386 | 0.056 | 0.251 | 0.539 |
| Manganese | Mn (ppm) | 969.551 | 167.197 | 277.879 | 1405.960 |
| Sodium | Na (wt%) | 0.676 | 0.079 | 0.475 | 0.828 |
| Phosphorus | P (wt%) | 0.057 | 0.008 | 0.037 | 0.100 |
| Lead | Pb (ppm) | 33.772 | 20.188 | 12.001 | 160.723 |
| Selenium | Se (ppm) | 0.219 | 0.058 | 0.100 | 0.497 |
| Titanium | Ti (wt%) | 0.276 | 0.032 | 0.200 | 0.378 |
| Zinc | Zn (ppm) | 73.274 | 8.600 | 42.170 | 115.804 |