| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.709 | 0.672 | 3.493 | 6.769 |
| Arsenic | As (ppm) | 11.998 | 2.512 | 5.654 | 19.344 |
| Calcium | Ca (wt%) | 0.367 | 0.141 | 0.106 | 0.965 |
| Copper | Cu (ppm) | 13.979 | 1.961 | 6.928 | 22.474 |
| Iron | Fe (wt%) | 2.994 | 0.287 | 2.230 | 3.960 |
| Mercury | Hg (ppm) | 0.040 | 0.008 | 0.021 | 0.087 |
| Magnesium | Mg (wt%) | 0.373 | 0.027 | 0.278 | 0.464 |
| Manganese | Mn (ppm) | 536.308 | 135.282 | 248.052 | 903.342 |
| Sodium | Na (wt%) | 0.466 | 0.047 | 0.295 | 0.572 |
| Phosphorus | P (wt%) | 0.050 | 0.008 | 0.036 | 0.079 |
| Lead | Pb (ppm) | 19.843 | 2.236 | 13.969 | 30.028 |
| Selenium | Se (ppm) | 0.445 | 0.096 | 0.208 | 0.783 |
| Titanium | Ti (wt%) | 0.343 | 0.045 | 0.246 | 0.660 |
| Zinc | Zn (ppm) | 77.208 | 9.768 | 55.004 | 128.388 |