| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.697 | 0.675 | 3.884 | 6.929 |
| Arsenic | As (ppm) | 4.450 | 0.536 | 2.757 | 5.761 |
| Calcium | Ca (wt%) | 2.139 | 0.776 | 0.860 | 4.639 |
| Copper | Cu (ppm) | 19.420 | 16.391 | 6.763 | 88.089 |
| Iron | Fe (wt%) | 3.383 | 0.985 | 1.922 | 6.422 |
| Mercury | Hg (ppm) | 0.017 | 0.006 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.914 | 0.302 | 0.424 | 1.886 |
| Manganese | Mn (ppm) | 545.950 | 126.373 | 323.274 | 1031.790 |
| Sodium | Na (wt%) | 1.050 | 0.121 | 0.719 | 1.402 |
| Phosphorus | P (wt%) | 0.092 | 0.021 | 0.061 | 0.168 |
| Lead | Pb (ppm) | 23.114 | 3.266 | 15.116 | 28.883 |
| Selenium | Se (ppm) | 0.151 | 0.046 | 0.100 | 0.296 |
| Titanium | Ti (wt%) | 0.565 | 0.202 | 0.269 | 1.185 |
| Zinc | Zn (ppm) | 78.869 | 13.741 | 54.721 | 110.536 |