| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.327 | 0.417 | 2.196 | 4.384 |
| Arsenic | As (ppm) | 5.803 | 1.685 | 2.881 | 12.832 |
| Calcium | Ca (wt%) | 4.760 | 2.148 | 0.446 | 10.996 |
| Copper | Cu (ppm) | 7.595 | 1.852 | 3.115 | 11.942 |
| Iron | Fe (wt%) | 1.436 | 0.333 | 0.560 | 2.039 |
| Mercury | Hg (ppm) | 0.013 | 0.003 | 0.010 | 0.027 |
| Magnesium | Mg (wt%) | 0.287 | 0.082 | 0.093 | 0.685 |
| Manganese | Mn (ppm) | 586.440 | 321.409 | 98.979 | 2220.140 |
| Sodium | Na (wt%) | 0.286 | 0.192 | 0.091 | 0.927 |
| Phosphorus | P (wt%) | 0.022 | 0.006 | 0.010 | 0.040 |
| Lead | Pb (ppm) | 16.305 | 1.062 | 13.258 | 18.934 |
| Selenium | Se (ppm) | 0.274 | 0.071 | 0.103 | 0.494 |
| Titanium | Ti (wt%) | 0.282 | 0.033 | 0.186 | 0.368 |
| Zinc | Zn (ppm) | 30.661 | 6.525 | 12.820 | 47.607 |