| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.051 | 0.574 | 5.249 | 8.037 |
| Arsenic | As (ppm) | 12.221 | 1.462 | 8.562 | 16.050 |
| Calcium | Ca (wt%) | 0.378 | 0.068 | 0.177 | 0.603 |
| Copper | Cu (ppm) | 20.824 | 3.535 | 14.538 | 30.802 |
| Iron | Fe (wt%) | 3.033 | 0.336 | 2.332 | 4.204 |
| Mercury | Hg (ppm) | 0.053 | 0.014 | 0.031 | 0.097 |
| Magnesium | Mg (wt%) | 0.562 | 0.091 | 0.425 | 0.924 |
| Manganese | Mn (ppm) | 434.550 | 62.461 | 300.762 | 609.442 |
| Sodium | Na (wt%) | 0.722 | 0.064 | 0.593 | 0.833 |
| Phosphorus | P (wt%) | 0.051 | 0.014 | 0.023 | 0.091 |
| Lead | Pb (ppm) | 23.197 | 3.659 | 17.651 | 31.650 |
| Selenium | Se (ppm) | 0.397 | 0.136 | 0.105 | 0.787 |
| Titanium | Ti (wt%) | 0.361 | 0.012 | 0.337 | 0.383 |
| Zinc | Zn (ppm) | 88.046 | 8.270 | 71.318 | 112.193 |