| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.936 | 0.237 | 6.247 | 7.458 |
| Arsenic | As (ppm) | 4.990 | 0.879 | 2.834 | 8.335 |
| Calcium | Ca (wt%) | 2.414 | 0.218 | 1.931 | 2.967 |
| Copper | Cu (ppm) | 19.519 | 2.386 | 11.183 | 28.082 |
| Iron | Fe (wt%) | 4.500 | 0.365 | 3.712 | 5.890 |
| Mercury | Hg (ppm) | 0.011 | 0.002 | 0.010 | 0.022 |
| Magnesium | Mg (wt%) | 1.182 | 0.079 | 1.023 | 1.498 |
| Manganese | Mn (ppm) | 774.279 | 55.434 | 636.161 | 956.188 |
| Sodium | Na (wt%) | 1.858 | 0.117 | 1.470 | 2.317 |
| Phosphorus | P (wt%) | 0.096 | 0.007 | 0.079 | 0.120 |
| Lead | Pb (ppm) | 13.392 | 1.213 | 10.055 | 16.766 |
| Selenium | Se (ppm) | 0.105 | 0.014 | 0.100 | 0.191 |
| Titanium | Ti (wt%) | 0.649 | 0.076 | 0.494 | 0.974 |
| Zinc | Zn (ppm) | 76.069 | 5.177 | 64.765 | 110.204 |