| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.218 | 0.561 | 3.450 | 6.221 |
| Arsenic | As (ppm) | 3.810 | 2.817 | 1.017 | 15.772 |
| Calcium | Ca (wt%) | 2.631 | 0.506 | 1.376 | 3.983 |
| Copper | Cu (ppm) | 7.941 | 3.486 | 3.041 | 23.105 |
| Iron | Fe (wt%) | 2.561 | 0.522 | 1.826 | 3.853 |
| Mercury | Hg (ppm) | 0.029 | 0.013 | 0.010 | 0.059 |
| Magnesium | Mg (wt%) | 1.056 | 0.178 | 0.558 | 1.539 |
| Manganese | Mn (ppm) | 617.070 | 97.051 | 404.624 | 897.658 |
| Sodium | Na (wt%) | 0.913 | 0.118 | 0.552 | 1.108 |
| Phosphorus | P (wt%) | 0.056 | 0.010 | 0.040 | 0.087 |
| Lead | Pb (ppm) | 19.946 | 5.147 | 12.822 | 36.509 |
| Selenium | Se (ppm) | 0.166 | 0.063 | 0.100 | 0.377 |
| Titanium | Ti (wt%) | 0.430 | 0.094 | 0.249 | 0.674 |
| Zinc | Zn (ppm) | 59.326 | 12.114 | 37.542 | 92.548 |