| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.245 | 0.523 | 2.622 | 5.329 |
| Arsenic | As (ppm) | 4.718 | 1.256 | 1.859 | 8.073 |
| Calcium | Ca (wt%) | 1.652 | 0.487 | 0.380 | 3.063 |
| Copper | Cu (ppm) | 10.886 | 1.741 | 5.237 | 14.953 |
| Iron | Fe (wt%) | 1.552 | 0.274 | 0.798 | 2.056 |
| Mercury | Hg (ppm) | 0.010 | 0.000 | 0.010 | 0.010 |
| Magnesium | Mg (wt%) | 1.091 | 0.482 | 0.163 | 1.897 |
| Manganese | Mn (ppm) | 685.287 | 392.613 | 194.690 | 2253.740 |
| Sodium | Na (wt%) | 0.791 | 0.095 | 0.414 | 1.087 |
| Phosphorus | P (wt%) | 0.041 | 0.010 | 0.013 | 0.055 |
| Lead | Pb (ppm) | 22.925 | 1.778 | 17.388 | 26.785 |
| Selenium | Se (ppm) | 0.160 | 0.045 | 0.100 | 0.297 |
| Titanium | Ti (wt%) | 0.253 | 0.025 | 0.171 | 0.318 |
| Zinc | Zn (ppm) | 29.440 | 7.755 | 11.320 | 43.493 |