| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.554 | 0.945 | 0.467 | 7.610 |
| Arsenic | As (ppm) | 4.872 | 1.871 | 1.425 | 26.811 |
| Calcium | Ca (wt%) | 3.670 | 2.830 | 0.936 | 23.410 |
| Copper | Cu (ppm) | 18.490 | 5.168 | 4.770 | 69.618 |
| Iron | Fe (wt%) | 3.377 | 1.316 | 0.298 | 27.024 |
| Mercury | Hg (ppm) | 0.018 | 0.008 | 0.010 | 0.071 |
| Magnesium | Mg (wt%) | 0.849 | 0.317 | 0.336 | 3.320 |
| Manganese | Mn (ppm) | 554.640 | 164.672 | 63.857 | 1725.790 |
| Sodium | Na (wt%) | 1.310 | 0.214 | 0.645 | 2.327 |
| Phosphorus | P (wt%) | 0.054 | 0.026 | 0.005 | 0.262 |
| Lead | Pb (ppm) | 21.198 | 7.714 | 2.709 | 108.483 |
| Selenium | Se (ppm) | 0.140 | 0.057 | 0.100 | 0.497 |
| Titanium | Ti (wt%) | 0.447 | 0.126 | 0.040 | 1.654 |
| Zinc | Zn (ppm) | 67.817 | 16.051 | 7.602 | 254.006 |