| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.906 | 0.449 | 4.921 | 7.257 |
| Arsenic | As (ppm) | 13.402 | 1.712 | 8.507 | 20.277 |
| Calcium | Ca (wt%) | 0.610 | 0.312 | 0.245 | 1.831 |
| Copper | Cu (ppm) | 24.822 | 2.534 | 18.259 | 32.260 |
| Iron | Fe (wt%) | 3.452 | 0.305 | 2.480 | 4.554 |
| Mercury | Hg (ppm) | 0.047 | 0.013 | 0.023 | 0.097 |
| Magnesium | Mg (wt%) | 0.497 | 0.060 | 0.373 | 0.675 |
| Manganese | Mn (ppm) | 776.969 | 65.261 | 547.879 | 965.424 |
| Sodium | Na (wt%) | 0.579 | 0.031 | 0.493 | 0.682 |
| Phosphorus | P (wt%) | 0.068 | 0.006 | 0.052 | 0.079 |
| Lead | Pb (ppm) | 29.315 | 8.819 | 17.451 | 78.668 |
| Selenium | Se (ppm) | 0.408 | 0.207 | 0.124 | 1.489 |
| Titanium | Ti (wt%) | 0.332 | 0.015 | 0.295 | 0.381 |
| Zinc | Zn (ppm) | 94.959 | 16.381 | 64.538 | 163.076 |