| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.868 | 1.117 | 2.342 | 7.699 |
| Arsenic | As (ppm) | 8.038 | 2.682 | 2.910 | 46.820 |
| Calcium | Ca (wt%) | 10.723 | 5.513 | 0.646 | 24.882 |
| Copper | Cu (ppm) | 18.340 | 8.060 | 1.314 | 65.007 |
| Iron | Fe (wt%) | 2.755 | 0.995 | 1.318 | 9.228 |
| Mercury | Hg (ppm) | 0.027 | 0.021 | 0.010 | 0.313 |
| Magnesium | Mg (wt%) | 0.631 | 0.138 | 0.329 | 1.540 |
| Manganese | Mn (ppm) | 541.449 | 255.771 | 167.312 | 2112.780 |
| Sodium | Na (wt%) | 0.864 | 0.487 | 0.140 | 2.721 |
| Phosphorus | P (wt%) | 0.071 | 0.040 | 0.030 | 0.427 |
| Lead | Pb (ppm) | 19.468 | 4.476 | 3.019 | 48.521 |
| Selenium | Se (ppm) | 0.553 | 0.412 | 0.101 | 2.760 |
| Titanium | Ti (wt%) | 0.470 | 0.240 | 0.156 | 2.022 |
| Zinc | Zn (ppm) | 83.510 | 25.763 | 38.166 | 227.723 |