| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.515 | 0.349 | 0.155 | 2.688 |
| Arsenic | As (ppm) | 1.138 | 0.452 | 0.328 | 3.120 |
| Calcium | Ca (wt%) | 2.410 | 2.103 | 0.192 | 11.926 |
| Copper | Cu (ppm) | 6.087 | 3.020 | 1.132 | 26.651 |
| Iron | Fe (wt%) | 0.213 | 0.121 | 0.056 | 0.902 |
| Mercury | Hg (ppm) | 0.018 | 0.006 | 0.010 | 0.037 |
| Magnesium | Mg (wt%) | 0.053 | 0.029 | 0.008 | 0.194 |
| Manganese | Mn (ppm) | 33.472 | 13.928 | 10.509 | 89.292 |
| Sodium | Na (wt%) | 0.038 | 0.024 | 0.005 | 0.146 |
| Phosphorus | P (wt%) | 0.021 | 0.010 | 0.004 | 0.060 |
| Lead | Pb (ppm) | 15.120 | 16.111 | 2.000 | 141.656 |
| Selenium | Se (ppm) | 0.259 | 0.170 | 0.103 | 1.086 |
| Titanium | Ti (wt%) | 0.186 | 0.054 | 0.053 | 0.291 |
| Zinc | Zn (ppm) | 17.197 | 13.664 | 1.188 | 88.538 |