| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.318 | 0.729 | 2.295 | 6.283 |
| Arsenic | As (ppm) | 4.380 | 0.972 | 1.799 | 7.859 |
| Calcium | Ca (wt%) | 2.015 | 0.818 | 0.834 | 7.298 |
| Copper | Cu (ppm) | 8.020 | 2.292 | 4.484 | 20.711 |
| Iron | Fe (wt%) | 2.146 | 0.385 | 0.984 | 3.114 |
| Mercury | Hg (ppm) | 0.010 | 0.001 | 0.010 | 0.017 |
| Magnesium | Mg (wt%) | 1.094 | 0.481 | 0.448 | 2.541 |
| Manganese | Mn (ppm) | 510.621 | 183.990 | 277.287 | 1352.650 |
| Sodium | Na (wt%) | 0.648 | 0.095 | 0.447 | 0.924 |
| Phosphorus | P (wt%) | 0.033 | 0.008 | 0.013 | 0.078 |
| Lead | Pb (ppm) | 16.985 | 2.208 | 9.749 | 29.579 |
| Selenium | Se (ppm) | 0.116 | 0.030 | 0.100 | 0.283 |
| Titanium | Ti (wt%) | 0.241 | 0.032 | 0.140 | 0.334 |
| Zinc | Zn (ppm) | 36.601 | 6.374 | 15.275 | 52.420 |