| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.047 | 0.836 | 1.031 | 7.388 |
| Arsenic | As (ppm) | 5.579 | 1.259 | 2.983 | 13.152 |
| Calcium | Ca (wt%) | 14.200 | 4.657 | 0.647 | 26.544 |
| Copper | Cu (ppm) | 11.461 | 1.550 | 7.102 | 16.896 |
| Iron | Fe (wt%) | 1.467 | 0.522 | 0.507 | 4.347 |
| Mercury | Hg (ppm) | 0.015 | 0.005 | 0.010 | 0.035 |
| Magnesium | Mg (wt%) | 0.766 | 0.154 | 0.281 | 1.390 |
| Manganese | Mn (ppm) | 436.349 | 124.463 | 233.943 | 977.925 |
| Sodium | Na (wt%) | 0.242 | 0.279 | 0.056 | 1.994 |
| Phosphorus | P (wt%) | 0.048 | 0.020 | 0.016 | 0.127 |
| Lead | Pb (ppm) | 14.642 | 4.941 | 2.134 | 30.797 |
| Selenium | Se (ppm) | 0.391 | 0.173 | 0.101 | 1.031 |
| Titanium | Ti (wt%) | 0.205 | 0.094 | 0.065 | 0.780 |
| Zinc | Zn (ppm) | 35.847 | 11.539 | 18.898 | 117.542 |