| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.722 | 0.652 | 6.783 | 10.630 |
| Arsenic | As (ppm) | 3.524 | 1.301 | 1.036 | 12.849 |
| Calcium | Ca (wt%) | 1.530 | 0.426 | 0.712 | 3.886 |
| Copper | Cu (ppm) | 40.014 | 13.570 | 16.234 | 73.484 |
| Iron | Fe (wt%) | 4.639 | 1.261 | 2.913 | 11.330 |
| Mercury | Hg (ppm) | 0.085 | 0.078 | 0.011 | 0.612 |
| Magnesium | Mg (wt%) | 0.851 | 0.163 | 0.496 | 1.553 |
| Manganese | Mn (ppm) | 864.424 | 177.622 | 419.395 | 1327.150 |
| Sodium | Na (wt%) | 1.612 | 0.418 | 0.489 | 3.463 |
| Phosphorus | P (wt%) | 0.090 | 0.037 | 0.030 | 0.210 |
| Lead | Pb (ppm) | 7.220 | 2.685 | 2.116 | 13.558 |
| Selenium | Se (ppm) | 0.422 | 0.202 | 0.103 | 0.887 |
| Titanium | Ti (wt%) | 0.742 | 0.178 | 0.450 | 1.615 |
| Zinc | Zn (ppm) | 81.686 | 15.026 | 48.729 | 148.455 |