| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.029 | 1.476 | 0.664 | 7.149 |
| Arsenic | As (ppm) | 9.167 | 5.118 | 0.968 | 29.657 |
| Calcium | Ca (wt%) | 4.031 | 1.556 | 1.018 | 7.644 |
| Copper | Cu (ppm) | 16.709 | 11.127 | 3.061 | 89.281 |
| Iron | Fe (wt%) | 2.085 | 0.944 | 0.297 | 5.025 |
| Mercury | Hg (ppm) | 0.024 | 0.013 | 0.005 | 0.086 |
| Magnesium | Mg (wt%) | 0.798 | 0.344 | 0.080 | 2.850 |
| Manganese | Mn (ppm) | 444.127 | 186.835 | 68.864 | 951.755 |
| Sodium | Na (wt%) | 0.573 | 0.317 | 0.030 | 1.477 |
| Phosphorus | P (wt%) | 0.079 | 0.023 | 0.032 | 0.136 |
| Lead | Pb (ppm) | 41.715 | 69.885 | 2.303 | 933.200 |
| Selenium | Se (ppm) | 0.327 | 0.223 | 0.100 | 1.475 |
| Titanium | Ti (wt%) | 0.237 | 0.105 | 0.036 | 0.579 |
| Zinc | Zn (ppm) | 63.009 | 26.259 | 12.213 | 250.384 |