| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.046 | 0.310 | 5.501 | 6.873 |
| Arsenic | As (ppm) | 6.009 | 1.775 | 2.381 | 10.507 |
| Calcium | Ca (wt%) | 1.322 | 0.241 | 0.962 | 1.935 |
| Copper | Cu (ppm) | 13.259 | 3.299 | 7.489 | 20.544 |
| Iron | Fe (wt%) | 2.362 | 0.211 | 1.869 | 2.783 |
| Mercury | Hg (ppm) | 0.064 | 0.034 | 0.015 | 0.198 |
| Magnesium | Mg (wt%) | 0.630 | 0.055 | 0.484 | 0.784 |
| Manganese | Mn (ppm) | 943.922 | 127.695 | 707.743 | 1350.550 |
| Sodium | Na (wt%) | 1.520 | 0.088 | 1.350 | 1.711 |
| Phosphorus | P (wt%) | 0.058 | 0.009 | 0.043 | 0.083 |
| Lead | Pb (ppm) | 44.652 | 14.168 | 30.345 | 100.931 |
| Selenium | Se (ppm) | 0.261 | 0.110 | 0.123 | 0.583 |
| Titanium | Ti (wt%) | 0.487 | 0.079 | 0.341 | 0.714 |
| Zinc | Zn (ppm) | 51.372 | 10.272 | 35.047 | 73.302 |