| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.466 | 0.649 | 2.570 | 7.623 |
| Arsenic | As (ppm) | 6.614 | 2.473 | 3.677 | 37.993 |
| Calcium | Ca (wt%) | 4.548 | 2.748 | 0.745 | 22.375 |
| Copper | Cu (ppm) | 11.944 | 5.201 | 1.019 | 35.743 |
| Iron | Fe (wt%) | 3.850 | 1.182 | 1.431 | 10.272 |
| Mercury | Hg (ppm) | 0.026 | 0.027 | 0.010 | 0.383 |
| Magnesium | Mg (wt%) | 0.655 | 0.142 | 0.301 | 1.307 |
| Manganese | Mn (ppm) | 846.702 | 226.818 | 333.840 | 2197.110 |
| Sodium | Na (wt%) | 1.486 | 0.277 | 0.400 | 2.393 |
| Phosphorus | P (wt%) | 0.092 | 0.037 | 0.007 | 0.263 |
| Lead | Pb (ppm) | 27.968 | 8.539 | 13.563 | 85.980 |
| Selenium | Se (ppm) | 0.244 | 0.176 | 0.100 | 1.505 |
| Titanium | Ti (wt%) | 0.675 | 0.232 | 0.207 | 1.811 |
| Zinc | Zn (ppm) | 108.942 | 27.302 | 44.853 | 307.690 |