| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.402 | 0.165 | 2.997 | 3.683 |
| Arsenic | As (ppm) | 7.394 | 1.188 | 5.098 | 10.080 |
| Calcium | Ca (wt%) | 9.727 | 4.045 | 3.304 | 18.978 |
| Copper | Cu (ppm) | 10.985 | 1.607 | 7.561 | 13.787 |
| Iron | Fe (wt%) | 1.810 | 0.252 | 1.260 | 2.236 |
| Mercury | Hg (ppm) | 0.010 | 0.001 | 0.010 | 0.012 |
| Magnesium | Mg (wt%) | 0.351 | 0.045 | 0.242 | 0.411 |
| Manganese | Mn (ppm) | 1235.030 | 347.044 | 655.056 | 2129.500 |
| Sodium | Na (wt%) | 0.260 | 0.040 | 0.189 | 0.329 |
| Phosphorus | P (wt%) | 0.042 | 0.010 | 0.024 | 0.063 |
| Lead | Pb (ppm) | 31.796 | 5.548 | 22.118 | 43.418 |
| Selenium | Se (ppm) | 0.340 | 0.085 | 0.186 | 0.494 |
| Titanium | Ti (wt%) | 0.207 | 0.014 | 0.163 | 0.230 |
| Zinc | Zn (ppm) | 39.332 | 5.840 | 26.842 | 47.829 |