| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.082 | 0.565 | 3.546 | 6.465 |
| Arsenic | As (ppm) | 2.817 | 1.905 | 0.587 | 16.587 |
| Calcium | Ca (wt%) | 1.803 | 0.491 | 0.623 | 3.085 |
| Copper | Cu (ppm) | 15.328 | 2.577 | 8.673 | 28.779 |
| Iron | Fe (wt%) | 3.447 | 0.347 | 2.333 | 4.955 |
| Mercury | Hg (ppm) | 0.031 | 0.007 | 0.011 | 0.060 |
| Magnesium | Mg (wt%) | 0.643 | 0.109 | 0.398 | 0.945 |
| Manganese | Mn (ppm) | 1111.710 | 242.332 | 422.531 | 2401.730 |
| Sodium | Na (wt%) | 1.463 | 0.297 | 0.718 | 2.177 |
| Phosphorus | P (wt%) | 0.094 | 0.015 | 0.044 | 0.161 |
| Lead | Pb (ppm) | 29.502 | 4.224 | 20.300 | 42.994 |
| Selenium | Se (ppm) | 0.146 | 0.045 | 0.100 | 0.594 |
| Titanium | Ti (wt%) | 0.824 | 0.158 | 0.212 | 1.333 |
| Zinc | Zn (ppm) | 48.703 | 7.734 | 32.453 | 112.347 |