| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.613 | 0.500 | 0.040 | 3.279 |
| Arsenic | As (ppm) | 2.781 | 1.728 | 0.367 | 8.391 |
| Calcium | Ca (wt%) | 1.605 | 2.257 | 0.038 | 16.707 |
| Copper | Cu (ppm) | 7.173 | 15.842 | 1.023 | 187.899 |
| Iron | Fe (wt%) | 0.361 | 0.260 | 0.008 | 1.683 |
| Mercury | Hg (ppm) | 0.019 | 0.012 | 0.010 | 0.090 |
| Magnesium | Mg (wt%) | 0.040 | 0.038 | 0.003 | 0.228 |
| Manganese | Mn (ppm) | 54.128 | 26.791 | 2.888 | 200.815 |
| Sodium | Na (wt%) | 0.020 | 0.012 | 0.003 | 0.097 |
| Phosphorus | P (wt%) | 0.016 | 0.010 | 0.003 | 0.059 |
| Lead | Pb (ppm) | 10.665 | 6.914 | 2.056 | 82.957 |
| Selenium | Se (ppm) | 0.197 | 0.130 | 0.100 | 0.993 |
| Titanium | Ti (wt%) | 0.207 | 0.069 | 0.026 | 0.738 |
| Zinc | Zn (ppm) | 7.834 | 9.269 | 1.076 | 103.868 |