| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.728 | 0.440 | 2.161 | 4.731 |
| Arsenic | As (ppm) | 5.472 | 1.088 | 2.653 | 7.997 |
| Calcium | Ca (wt%) | 7.052 | 2.155 | 2.446 | 11.773 |
| Copper | Cu (ppm) | 12.238 | 1.454 | 8.222 | 16.290 |
| Iron | Fe (wt%) | 1.549 | 0.194 | 0.955 | 2.066 |
| Mercury | Hg (ppm) | 0.012 | 0.003 | 0.010 | 0.028 |
| Magnesium | Mg (wt%) | 0.577 | 0.074 | 0.314 | 0.764 |
| Manganese | Mn (ppm) | 287.379 | 42.086 | 187.898 | 449.890 |
| Sodium | Na (wt%) | 0.513 | 0.048 | 0.317 | 0.615 |
| Phosphorus | P (wt%) | 0.045 | 0.008 | 0.026 | 0.099 |
| Lead | Pb (ppm) | 14.553 | 2.978 | 10.247 | 35.961 |
| Selenium | Se (ppm) | 0.210 | 0.186 | 0.100 | 1.264 |
| Titanium | Ti (wt%) | 0.222 | 0.021 | 0.145 | 0.279 |
| Zinc | Zn (ppm) | 49.771 | 6.763 | 27.850 | 68.698 |