| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.462 | 0.679 | 2.209 | 6.448 |
| Arsenic | As (ppm) | 7.315 | 1.073 | 3.629 | 12.480 |
| Calcium | Ca (wt%) | 8.233 | 1.883 | 3.145 | 13.214 |
| Copper | Cu (ppm) | 14.628 | 2.368 | 7.038 | 20.614 |
| Iron | Fe (wt%) | 1.941 | 0.320 | 0.827 | 2.861 |
| Mercury | Hg (ppm) | 0.017 | 0.006 | 0.010 | 0.037 |
| Magnesium | Mg (wt%) | 0.653 | 0.097 | 0.332 | 0.892 |
| Manganese | Mn (ppm) | 397.999 | 86.328 | 114.450 | 598.096 |
| Sodium | Na (wt%) | 0.439 | 0.069 | 0.300 | 0.606 |
| Phosphorus | P (wt%) | 0.054 | 0.009 | 0.025 | 0.096 |
| Lead | Pb (ppm) | 16.312 | 3.593 | 10.173 | 35.761 |
| Selenium | Se (ppm) | 0.283 | 0.065 | 0.102 | 0.481 |
| Titanium | Ti (wt%) | 0.274 | 0.036 | 0.167 | 0.365 |
| Zinc | Zn (ppm) | 69.441 | 15.439 | 39.050 | 155.259 |