| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.881 | 0.599 | 3.523 | 5.630 |
| Arsenic | As (ppm) | 6.308 | 1.409 | 4.166 | 9.946 |
| Calcium | Ca (wt%) | 3.585 | 2.851 | 0.757 | 8.019 |
| Copper | Cu (ppm) | 18.140 | 2.799 | 12.155 | 24.305 |
| Iron | Fe (wt%) | 1.991 | 0.210 | 1.405 | 2.238 |
| Mercury | Hg (ppm) | 0.019 | 0.007 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 0.881 | 0.370 | 0.552 | 2.119 |
| Manganese | Mn (ppm) | 604.135 | 75.294 | 435.940 | 740.106 |
| Sodium | Na (wt%) | 0.680 | 0.118 | 0.346 | 0.805 |
| Phosphorus | P (wt%) | 0.104 | 0.017 | 0.065 | 0.130 |
| Lead | Pb (ppm) | 22.698 | 2.299 | 18.127 | 27.004 |
| Selenium | Se (ppm) | 0.360 | 0.303 | 0.102 | 1.384 |
| Titanium | Ti (wt%) | 0.234 | 0.051 | 0.140 | 0.294 |
| Zinc | Zn (ppm) | 79.241 | 18.696 | 48.904 | 117.620 |