| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.455 | 1.393 | 1.446 | 6.091 |
| Arsenic | As (ppm) | 10.518 | 2.175 | 7.398 | 13.951 |
| Calcium | Ca (wt%) | 0.973 | 0.255 | 0.692 | 1.625 |
| Copper | Cu (ppm) | 27.962 | 4.545 | 21.687 | 39.234 |
| Iron | Fe (wt%) | 2.584 | 0.745 | 1.131 | 3.389 |
| Mercury | Hg (ppm) | 0.092 | 0.011 | 0.076 | 0.110 |
| Magnesium | Mg (wt%) | 0.822 | 0.045 | 0.706 | 0.984 |
| Manganese | Mn (ppm) | 441.838 | 201.894 | 184.130 | 689.733 |
| Sodium | Na (wt%) | 1.061 | 0.443 | 0.615 | 1.953 |
| Phosphorus | P (wt%) | 0.094 | 0.029 | 0.055 | 0.130 |
| Lead | Pb (ppm) | 34.169 | 13.063 | 12.510 | 66.214 |
| Selenium | Se (ppm) | 1.116 | 0.143 | 0.833 | 1.385 |
| Titanium | Ti (wt%) | 0.186 | 0.062 | 0.056 | 0.263 |
| Zinc | Zn (ppm) | 72.640 | 17.667 | 36.433 | 97.731 |