| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.421 | 0.832 | 1.136 | 4.951 |
| Arsenic | As (ppm) | 2.302 | 1.308 | 0.560 | 7.637 |
| Calcium | Ca (wt%) | 0.507 | 0.212 | 0.135 | 1.174 |
| Copper | Cu (ppm) | 7.925 | 1.931 | 3.850 | 14.934 |
| Iron | Fe (wt%) | 2.067 | 0.784 | 0.644 | 5.062 |
| Mercury | Hg (ppm) | 0.023 | 0.007 | 0.012 | 0.065 |
| Magnesium | Mg (wt%) | 0.141 | 0.063 | 0.035 | 0.282 |
| Manganese | Mn (ppm) | 480.691 | 242.865 | 169.822 | 1515.270 |
| Sodium | Na (wt%) | 0.651 | 0.285 | 0.147 | 1.562 |
| Phosphorus | P (wt%) | 0.038 | 0.008 | 0.023 | 0.074 |
| Lead | Pb (ppm) | 23.244 | 4.749 | 15.071 | 41.516 |
| Selenium | Se (ppm) | 0.164 | 0.043 | 0.105 | 0.311 |
| Titanium | Ti (wt%) | 0.595 | 0.114 | 0.301 | 0.968 |
| Zinc | Zn (ppm) | 25.955 | 9.586 | 9.299 | 52.083 |