| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.641 | 0.724 | 2.340 | 5.477 |
| Arsenic | As (ppm) | 5.223 | 1.625 | 3.237 | 14.513 |
| Calcium | Ca (wt%) | 2.147 | 0.837 | 0.360 | 4.249 |
| Copper | Cu (ppm) | 7.104 | 1.707 | 2.540 | 10.661 |
| Iron | Fe (wt%) | 1.255 | 0.194 | 0.578 | 1.652 |
| Mercury | Hg (ppm) | 0.013 | 0.004 | 0.010 | 0.029 |
| Magnesium | Mg (wt%) | 0.368 | 0.120 | 0.132 | 0.693 |
| Manganese | Mn (ppm) | 249.931 | 65.394 | 89.066 | 399.412 |
| Sodium | Na (wt%) | 0.443 | 0.162 | 0.237 | 0.901 |
| Phosphorus | P (wt%) | 0.022 | 0.004 | 0.010 | 0.033 |
| Lead | Pb (ppm) | 12.873 | 3.463 | 7.168 | 21.627 |
| Selenium | Se (ppm) | 0.282 | 0.055 | 0.203 | 0.440 |
| Titanium | Ti (wt%) | 0.260 | 0.036 | 0.177 | 0.397 |
| Zinc | Zn (ppm) | 33.126 | 6.593 | 19.099 | 49.270 |