| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.277 | 0.547 | 2.683 | 5.653 |
| Arsenic | As (ppm) | 8.543 | 3.909 | 3.111 | 29.860 |
| Calcium | Ca (wt%) | 0.407 | 0.137 | 0.127 | 0.969 |
| Copper | Cu (ppm) | 10.776 | 2.057 | 6.128 | 18.551 |
| Iron | Fe (wt%) | 1.657 | 0.320 | 1.008 | 2.710 |
| Mercury | Hg (ppm) | 0.047 | 0.013 | 0.021 | 0.088 |
| Magnesium | Mg (wt%) | 0.236 | 0.056 | 0.115 | 0.474 |
| Manganese | Mn (ppm) | 628.647 | 191.253 | 281.609 | 1659.450 |
| Sodium | Na (wt%) | 0.680 | 0.126 | 0.263 | 1.021 |
| Phosphorus | P (wt%) | 0.049 | 0.021 | 0.015 | 0.147 |
| Lead | Pb (ppm) | 24.402 | 7.135 | 11.549 | 52.930 |
| Selenium | Se (ppm) | 0.369 | 0.113 | 0.115 | 0.705 |
| Titanium | Ti (wt%) | 0.339 | 0.033 | 0.222 | 0.416 |
| Zinc | Zn (ppm) | 53.334 | 12.192 | 20.759 | 87.492 |