| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.487 | 0.665 | 6.566 | 9.077 |
| Arsenic | As (ppm) | 14.168 | 1.502 | 9.833 | 15.500 |
| Calcium | Ca (wt%) | 0.934 | 0.060 | 0.760 | 0.985 |
| Copper | Cu (ppm) | 46.990 | 4.525 | 33.930 | 51.000 |
| Iron | Fe (wt%) | 3.816 | 0.355 | 2.792 | 4.130 |
| Mercury | Hg (ppm) | 0.108 | 0.002 | 0.103 | 0.110 |
| Magnesium | Mg (wt%) | 1.196 | 0.110 | 0.879 | 1.293 |
| Manganese | Mn (ppm) | 495.604 | 49.928 | 351.548 | 540.000 |
| Sodium | Na (wt%) | 0.341 | 0.033 | 0.311 | 0.435 |
| Phosphorus | P (wt%) | 0.057 | 0.005 | 0.043 | 0.061 |
| Lead | Pb (ppm) | 30.459 | 9.879 | 22.000 | 58.871 |
| Selenium | Se (ppm) | 1.151 | 0.054 | 0.995 | 1.200 |
| Titanium | Ti (wt%) | 0.343 | 0.023 | 0.278 | 0.363 |
| Zinc | Zn (ppm) | 179.670 | 24.078 | 110.188 | 201.000 |