| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.253 | 0.934 | 0.369 | 5.349 |
| Arsenic | As (ppm) | 3.674 | 1.437 | 0.971 | 7.091 |
| Calcium | Ca (wt%) | 1.239 | 1.067 | 0.026 | 7.501 |
| Copper | Cu (ppm) | 4.914 | 1.393 | 1.084 | 9.469 |
| Iron | Fe (wt%) | 1.306 | 0.394 | 0.266 | 2.593 |
| Mercury | Hg (ppm) | 0.031 | 0.011 | 0.010 | 0.078 |
| Magnesium | Mg (wt%) | 0.116 | 0.061 | 0.013 | 0.393 |
| Manganese | Mn (ppm) | 208.642 | 76.054 | 67.808 | 433.484 |
| Sodium | Na (wt%) | 0.078 | 0.025 | 0.011 | 0.185 |
| Phosphorus | P (wt%) | 0.026 | 0.009 | 0.008 | 0.055 |
| Lead | Pb (ppm) | 18.685 | 4.474 | 9.110 | 40.891 |
| Selenium | Se (ppm) | 0.238 | 0.090 | 0.103 | 0.486 |
| Titanium | Ti (wt%) | 0.507 | 0.089 | 0.322 | 0.877 |
| Zinc | Zn (ppm) | 23.642 | 8.001 | 6.351 | 46.741 |