| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.249 | 1.358 | 4.024 | 9.881 |
| Arsenic | As (ppm) | 131.369 | 428.740 | 1.375 | 4297.280 |
| Calcium | Ca (wt%) | 1.578 | 0.605 | 0.701 | 3.895 |
| Copper | Cu (ppm) | 15.079 | 13.716 | 1.449 | 117.985 |
| Iron | Fe (wt%) | 2.554 | 0.627 | 0.623 | 5.542 |
| Mercury | Hg (ppm) | 0.058 | 0.110 | 0.010 | 1.073 |
| Magnesium | Mg (wt%) | 0.633 | 0.267 | 0.112 | 1.439 |
| Manganese | Mn (ppm) | 611.161 | 132.411 | 232.036 | 1081.730 |
| Sodium | Na (wt%) | 1.798 | 0.616 | 0.774 | 3.430 |
| Phosphorus | P (wt%) | 0.076 | 0.026 | 0.017 | 0.240 |
| Lead | Pb (ppm) | 196.867 | 536.405 | 13.382 | 5427.040 |
| Selenium | Se (ppm) | 0.137 | 0.051 | 0.100 | 0.299 |
| Titanium | Ti (wt%) | 0.339 | 0.121 | 0.052 | 0.993 |
| Zinc | Zn (ppm) | 121.647 | 131.749 | 24.041 | 1446.330 |