| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.588 | 1.337 | 2.237 | 8.755 |
| Arsenic | As (ppm) | 12.248 | 3.043 | 3.462 | 18.753 |
| Calcium | Ca (wt%) | 0.467 | 0.692 | 0.093 | 3.926 |
| Copper | Cu (ppm) | 21.733 | 17.540 | 9.798 | 130.843 |
| Iron | Fe (wt%) | 2.915 | 0.711 | 1.743 | 6.769 |
| Mercury | Hg (ppm) | 0.031 | 0.017 | 0.010 | 0.109 |
| Magnesium | Mg (wt%) | 0.480 | 0.305 | 0.114 | 1.639 |
| Manganese | Mn (ppm) | 928.843 | 323.574 | 463.126 | 1703.230 |
| Sodium | Na (wt%) | 0.577 | 0.398 | 0.090 | 1.911 |
| Phosphorus | P (wt%) | 0.052 | 0.013 | 0.027 | 0.103 |
| Lead | Pb (ppm) | 15.954 | 3.314 | 7.467 | 22.377 |
| Selenium | Se (ppm) | 0.224 | 0.068 | 0.100 | 0.398 |
| Titanium | Ti (wt%) | 0.278 | 0.074 | 0.128 | 0.686 |
| Zinc | Zn (ppm) | 103.202 | 41.740 | 57.126 | 243.449 |