| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.700 | 0.612 | 1.771 | 4.280 |
| Arsenic | As (ppm) | 5.308 | 0.448 | 3.926 | 6.526 |
| Calcium | Ca (wt%) | 2.557 | 1.864 | 0.311 | 8.379 |
| Copper | Cu (ppm) | 8.990 | 1.738 | 4.177 | 13.716 |
| Iron | Fe (wt%) | 1.412 | 0.266 | 0.962 | 2.003 |
| Mercury | Hg (ppm) | 0.021 | 0.007 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.264 | 0.138 | 0.111 | 0.788 |
| Manganese | Mn (ppm) | 806.982 | 491.372 | 235.923 | 2561.930 |
| Sodium | Na (wt%) | 0.173 | 0.116 | 0.076 | 0.641 |
| Phosphorus | P (wt%) | 0.032 | 0.015 | 0.010 | 0.092 |
| Lead | Pb (ppm) | 14.540 | 1.653 | 10.039 | 18.692 |
| Selenium | Se (ppm) | 0.241 | 0.078 | 0.101 | 0.474 |
| Titanium | Ti (wt%) | 0.277 | 0.071 | 0.208 | 0.525 |
| Zinc | Zn (ppm) | 29.232 | 7.957 | 15.765 | 54.742 |