| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.586 | 0.459 | 2.403 | 4.811 |
| Arsenic | As (ppm) | 4.049 | 0.815 | 2.228 | 7.410 |
| Calcium | Ca (wt%) | 2.574 | 0.977 | 0.748 | 5.088 |
| Copper | Cu (ppm) | 8.363 | 1.915 | 2.379 | 14.074 |
| Iron | Fe (wt%) | 1.512 | 0.163 | 1.116 | 2.104 |
| Mercury | Hg (ppm) | 0.019 | 0.015 | 0.010 | 0.099 |
| Magnesium | Mg (wt%) | 0.822 | 0.405 | 0.237 | 2.156 |
| Manganese | Mn (ppm) | 323.314 | 51.941 | 205.853 | 460.968 |
| Sodium | Na (wt%) | 0.580 | 0.102 | 0.351 | 0.935 |
| Phosphorus | P (wt%) | 0.028 | 0.006 | 0.014 | 0.049 |
| Lead | Pb (ppm) | 17.183 | 2.084 | 10.861 | 22.601 |
| Selenium | Se (ppm) | 0.147 | 0.036 | 0.100 | 0.311 |
| Titanium | Ti (wt%) | 0.241 | 0.028 | 0.159 | 0.328 |
| Zinc | Zn (ppm) | 27.930 | 5.160 | 16.025 | 48.913 |