| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.255 | 0.498 | 2.789 | 5.278 |
| Arsenic | As (ppm) | 5.220 | 0.747 | 2.991 | 7.086 |
| Calcium | Ca (wt%) | 2.389 | 0.569 | 1.245 | 3.704 |
| Copper | Cu (ppm) | 12.249 | 1.888 | 8.877 | 15.927 |
| Iron | Fe (wt%) | 1.948 | 0.643 | 1.333 | 4.918 |
| Mercury | Hg (ppm) | 0.026 | 0.021 | 0.010 | 0.138 |
| Magnesium | Mg (wt%) | 1.502 | 0.357 | 0.559 | 2.675 |
| Manganese | Mn (ppm) | 384.249 | 129.629 | 254.887 | 978.269 |
| Sodium | Na (wt%) | 0.763 | 0.140 | 0.458 | 1.106 |
| Phosphorus | P (wt%) | 0.040 | 0.004 | 0.030 | 0.050 |
| Lead | Pb (ppm) | 20.470 | 2.327 | 15.272 | 29.514 |
| Selenium | Se (ppm) | 0.141 | 0.040 | 0.100 | 0.295 |
| Titanium | Ti (wt%) | 0.284 | 0.085 | 0.191 | 0.691 |
| Zinc | Zn (ppm) | 31.189 | 3.857 | 21.407 | 41.631 |