| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.908 | 0.373 | 3.140 | 5.076 |
| Arsenic | As (ppm) | 9.554 | 1.142 | 5.449 | 11.877 |
| Calcium | Ca (wt%) | 0.835 | 0.678 | 0.118 | 3.674 |
| Copper | Cu (ppm) | 13.290 | 3.307 | 5.486 | 23.836 |
| Iron | Fe (wt%) | 2.740 | 0.333 | 1.958 | 3.907 |
| Mercury | Hg (ppm) | 0.052 | 0.008 | 0.036 | 0.080 |
| Magnesium | Mg (wt%) | 0.295 | 0.030 | 0.216 | 0.363 |
| Manganese | Mn (ppm) | 784.517 | 175.588 | 398.687 | 1293.000 |
| Sodium | Na (wt%) | 0.393 | 0.062 | 0.314 | 0.613 |
| Phosphorus | P (wt%) | 0.045 | 0.005 | 0.034 | 0.056 |
| Lead | Pb (ppm) | 49.910 | 31.374 | 17.443 | 177.740 |
| Selenium | Se (ppm) | 0.346 | 0.071 | 0.121 | 0.498 |
| Titanium | Ti (wt%) | 0.301 | 0.030 | 0.219 | 0.419 |
| Zinc | Zn (ppm) | 97.261 | 14.514 | 53.550 | 143.683 |