| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.497 | 0.735 | 2.160 | 7.378 |
| Arsenic | As (ppm) | 6.874 | 3.074 | 3.009 | 27.785 |
| Calcium | Ca (wt%) | 4.479 | 2.291 | 0.711 | 17.255 |
| Copper | Cu (ppm) | 15.091 | 3.628 | 5.138 | 24.946 |
| Iron | Fe (wt%) | 1.940 | 0.460 | 1.092 | 3.806 |
| Mercury | Hg (ppm) | 0.019 | 0.007 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 1.233 | 0.809 | 0.444 | 8.320 |
| Manganese | Mn (ppm) | 518.777 | 210.218 | 214.677 | 2400.660 |
| Sodium | Na (wt%) | 0.696 | 0.367 | 0.130 | 2.388 |
| Phosphorus | P (wt%) | 0.106 | 0.021 | 0.050 | 0.201 |
| Lead | Pb (ppm) | 20.002 | 3.825 | 10.470 | 36.265 |
| Selenium | Se (ppm) | 0.435 | 0.213 | 0.101 | 1.369 |
| Titanium | Ti (wt%) | 0.218 | 0.063 | 0.095 | 0.504 |
| Zinc | Zn (ppm) | 60.219 | 16.561 | 26.130 | 193.523 |