| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.339 | 0.974 | 2.191 | 6.964 |
| Arsenic | As (ppm) | 6.351 | 0.586 | 4.944 | 7.982 |
| Calcium | Ca (wt%) | 5.820 | 3.057 | 1.241 | 16.105 |
| Copper | Cu (ppm) | 15.720 | 9.991 | 6.986 | 74.843 |
| Iron | Fe (wt%) | 2.356 | 0.461 | 0.980 | 3.177 |
| Mercury | Hg (ppm) | 0.014 | 0.005 | 0.010 | 0.031 |
| Magnesium | Mg (wt%) | 0.597 | 0.073 | 0.443 | 0.838 |
| Manganese | Mn (ppm) | 482.716 | 126.489 | 132.597 | 805.348 |
| Sodium | Na (wt%) | 1.098 | 0.261 | 0.277 | 1.548 |
| Phosphorus | P (wt%) | 0.053 | 0.011 | 0.028 | 0.085 |
| Lead | Pb (ppm) | 14.732 | 3.671 | 2.427 | 22.180 |
| Selenium | Se (ppm) | 0.176 | 0.053 | 0.100 | 0.300 |
| Titanium | Ti (wt%) | 0.362 | 0.086 | 0.110 | 0.525 |
| Zinc | Zn (ppm) | 89.258 | 17.106 | 32.043 | 115.023 |