| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.640 | 0.676 | 1.475 | 4.674 |
| Arsenic | As (ppm) | 7.249 | 2.087 | 2.972 | 15.467 |
| Calcium | Ca (wt%) | 3.866 | 3.295 | 0.135 | 14.864 |
| Copper | Cu (ppm) | 8.781 | 3.878 | 3.653 | 25.935 |
| Iron | Fe (wt%) | 1.490 | 0.324 | 0.678 | 2.566 |
| Mercury | Hg (ppm) | 0.017 | 0.008 | 0.010 | 0.058 |
| Magnesium | Mg (wt%) | 0.225 | 0.096 | 0.086 | 0.538 |
| Manganese | Mn (ppm) | 446.529 | 198.015 | 117.997 | 1608.730 |
| Sodium | Na (wt%) | 0.172 | 0.070 | 0.049 | 0.355 |
| Phosphorus | P (wt%) | 0.019 | 0.011 | 0.005 | 0.054 |
| Lead | Pb (ppm) | 18.898 | 7.525 | 7.507 | 48.394 |
| Selenium | Se (ppm) | 0.263 | 0.090 | 0.102 | 0.521 |
| Titanium | Ti (wt%) | 0.284 | 0.056 | 0.136 | 0.573 |
| Zinc | Zn (ppm) | 35.067 | 15.752 | 12.037 | 126.063 |