| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.505 | 0.494 | 2.694 | 5.853 |
| Arsenic | As (ppm) | 11.570 | 2.295 | 2.857 | 17.068 |
| Calcium | Ca (wt%) | 0.923 | 0.958 | 0.199 | 6.086 |
| Copper | Cu (ppm) | 14.507 | 2.982 | 8.516 | 33.637 |
| Iron | Fe (wt%) | 2.674 | 0.218 | 1.982 | 3.338 |
| Mercury | Hg (ppm) | 0.030 | 0.008 | 0.011 | 0.059 |
| Magnesium | Mg (wt%) | 0.530 | 0.207 | 0.177 | 1.539 |
| Manganese | Mn (ppm) | 653.413 | 162.309 | 217.197 | 1047.250 |
| Sodium | Na (wt%) | 0.706 | 0.142 | 0.180 | 1.458 |
| Phosphorus | P (wt%) | 0.048 | 0.009 | 0.023 | 0.075 |
| Lead | Pb (ppm) | 17.363 | 2.564 | 9.166 | 22.000 |
| Selenium | Se (ppm) | 0.169 | 0.057 | 0.100 | 0.297 |
| Titanium | Ti (wt%) | 0.366 | 0.061 | 0.163 | 0.619 |
| Zinc | Zn (ppm) | 76.458 | 10.707 | 45.737 | 111.411 |