| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.682 | 0.708 | 1.692 | 7.011 |
| Arsenic | As (ppm) | 7.320 | 2.248 | 2.500 | 15.232 |
| Calcium | Ca (wt%) | 7.076 | 4.009 | 0.427 | 16.938 |
| Copper | Cu (ppm) | 11.426 | 3.077 | 3.862 | 23.605 |
| Iron | Fe (wt%) | 2.197 | 0.529 | 0.675 | 4.076 |
| Mercury | Hg (ppm) | 0.011 | 0.001 | 0.010 | 0.014 |
| Magnesium | Mg (wt%) | 0.390 | 0.116 | 0.099 | 1.033 |
| Manganese | Mn (ppm) | 1124.720 | 736.898 | 304.062 | 4173.160 |
| Sodium | Na (wt%) | 0.298 | 0.164 | 0.129 | 1.153 |
| Phosphorus | P (wt%) | 0.052 | 0.014 | 0.013 | 0.098 |
| Lead | Pb (ppm) | 18.270 | 6.681 | 6.764 | 39.945 |
| Selenium | Se (ppm) | 0.359 | 0.128 | 0.106 | 0.682 |
| Titanium | Ti (wt%) | 0.322 | 0.068 | 0.140 | 0.581 |
| Zinc | Zn (ppm) | 50.430 | 12.950 | 13.053 | 93.472 |