| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.119 | 0.203 | 1.653 | 2.659 |
| Arsenic | As (ppm) | 4.490 | 0.513 | 3.616 | 5.919 |
| Calcium | Ca (wt%) | 1.268 | 0.910 | 0.124 | 3.455 |
| Copper | Cu (ppm) | 8.301 | 1.907 | 5.232 | 12.892 |
| Iron | Fe (wt%) | 1.459 | 0.237 | 1.023 | 1.984 |
| Mercury | Hg (ppm) | 0.036 | 0.004 | 0.030 | 0.047 |
| Magnesium | Mg (wt%) | 0.200 | 0.071 | 0.100 | 0.355 |
| Manganese | Mn (ppm) | 541.071 | 137.591 | 290.533 | 900.957 |
| Sodium | Na (wt%) | 0.077 | 0.038 | 0.032 | 0.168 |
| Phosphorus | P (wt%) | 0.022 | 0.004 | 0.016 | 0.029 |
| Lead | Pb (ppm) | 211.951 | 122.819 | 27.554 | 519.481 |
| Selenium | Se (ppm) | 0.248 | 0.042 | 0.187 | 0.391 |
| Titanium | Ti (wt%) | 0.207 | 0.013 | 0.181 | 0.239 |
| Zinc | Zn (ppm) | 44.367 | 6.380 | 30.325 | 60.946 |