| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.281 | 0.861 | 1.280 | 5.161 |
| Arsenic | As (ppm) | 6.635 | 1.916 | 1.974 | 11.707 |
| Calcium | Ca (wt%) | 1.686 | 1.049 | 0.130 | 4.626 |
| Copper | Cu (ppm) | 9.581 | 3.795 | 3.061 | 24.435 |
| Iron | Fe (wt%) | 1.484 | 0.434 | 0.585 | 2.614 |
| Mercury | Hg (ppm) | 0.026 | 0.016 | 0.010 | 0.078 |
| Magnesium | Mg (wt%) | 0.342 | 0.152 | 0.066 | 0.800 |
| Manganese | Mn (ppm) | 406.662 | 216.468 | 119.683 | 1609.950 |
| Sodium | Na (wt%) | 0.270 | 0.063 | 0.106 | 0.401 |
| Phosphorus | P (wt%) | 0.029 | 0.015 | 0.007 | 0.086 |
| Lead | Pb (ppm) | 14.440 | 5.168 | 5.264 | 42.386 |
| Selenium | Se (ppm) | 0.206 | 0.105 | 0.100 | 0.781 |
| Titanium | Ti (wt%) | 0.245 | 0.032 | 0.142 | 0.312 |
| Zinc | Zn (ppm) | 32.774 | 12.121 | 9.180 | 82.060 |