| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.844 | 0.727 | 4.280 | 8.855 |
| Arsenic | As (ppm) | 10.034 | 2.167 | 4.749 | 17.241 |
| Calcium | Ca (wt%) | 0.760 | 0.135 | 0.429 | 1.245 |
| Copper | Cu (ppm) | 22.249 | 6.341 | 10.531 | 51.720 |
| Iron | Fe (wt%) | 2.288 | 0.413 | 1.402 | 3.876 |
| Mercury | Hg (ppm) | 0.042 | 0.011 | 0.017 | 0.086 |
| Magnesium | Mg (wt%) | 0.561 | 0.112 | 0.272 | 0.913 |
| Manganese | Mn (ppm) | 531.527 | 76.352 | 320.315 | 790.204 |
| Sodium | Na (wt%) | 0.930 | 0.116 | 0.623 | 1.210 |
| Phosphorus | P (wt%) | 0.080 | 0.022 | 0.042 | 0.183 |
| Lead | Pb (ppm) | 22.738 | 8.787 | 15.236 | 75.277 |
| Selenium | Se (ppm) | 0.582 | 0.159 | 0.226 | 1.139 |
| Titanium | Ti (wt%) | 0.292 | 0.032 | 0.204 | 0.387 |
| Zinc | Zn (ppm) | 77.462 | 14.065 | 42.753 | 134.524 |