| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 8.193 | 0.569 | 6.616 | 10.224 |
| Arsenic | As (ppm) | 5.993 | 1.455 | 2.153 | 9.900 |
| Calcium | Ca (wt%) | 0.844 | 0.566 | 0.216 | 4.816 |
| Copper | Cu (ppm) | 67.038 | 28.552 | 19.415 | 149.217 |
| Iron | Fe (wt%) | 5.417 | 1.234 | 2.902 | 8.484 |
| Mercury | Hg (ppm) | 0.117 | 0.049 | 0.012 | 0.268 |
| Magnesium | Mg (wt%) | 0.832 | 0.331 | 0.471 | 3.045 |
| Manganese | Mn (ppm) | 722.812 | 334.141 | 276.732 | 1805.630 |
| Sodium | Na (wt%) | 1.051 | 0.383 | 0.331 | 1.947 |
| Phosphorus | P (wt%) | 0.088 | 0.026 | 0.026 | 0.198 |
| Lead | Pb (ppm) | 7.690 | 2.176 | 2.049 | 14.770 |
| Selenium | Se (ppm) | 1.306 | 0.763 | 0.125 | 3.164 |
| Titanium | Ti (wt%) | 0.813 | 0.242 | 0.349 | 1.516 |
| Zinc | Zn (ppm) | 77.487 | 10.659 | 57.165 | 111.598 |