| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.785 | 1.176 | 1.687 | 9.885 |
| Arsenic | As (ppm) | 5.672 | 4.185 | 2.082 | 34.143 |
| Calcium | Ca (wt%) | 2.078 | 0.386 | 0.841 | 3.410 |
| Copper | Cu (ppm) | 27.140 | 6.032 | 12.000 | 69.696 |
| Iron | Fe (wt%) | 5.074 | 0.591 | 2.818 | 7.559 |
| Mercury | Hg (ppm) | 0.038 | 0.031 | 0.010 | 0.274 |
| Magnesium | Mg (wt%) | 2.410 | 3.029 | 0.693 | 19.087 |
| Manganese | Mn (ppm) | 822.869 | 130.334 | 541.099 | 1341.850 |
| Sodium | Na (wt%) | 1.880 | 0.247 | 0.487 | 2.465 |
| Phosphorus | P (wt%) | 0.074 | 0.020 | 0.010 | 0.124 |
| Lead | Pb (ppm) | 6.646 | 4.040 | 2.021 | 37.767 |
| Selenium | Se (ppm) | 0.120 | 0.040 | 0.100 | 0.299 |
| Titanium | Ti (wt%) | 0.619 | 0.136 | 0.137 | 0.965 |
| Zinc | Zn (ppm) | 87.585 | 10.850 | 47.076 | 115.263 |