| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.279 | 0.586 | 2.392 | 6.104 |
| Arsenic | As (ppm) | 4.121 | 0.703 | 1.956 | 5.985 |
| Calcium | Ca (wt%) | 1.199 | 0.367 | 0.426 | 2.970 |
| Copper | Cu (ppm) | 9.247 | 3.030 | 1.574 | 18.849 |
| Iron | Fe (wt%) | 1.833 | 0.288 | 0.920 | 2.622 |
| Mercury | Hg (ppm) | 0.017 | 0.006 | 0.010 | 0.040 |
| Magnesium | Mg (wt%) | 0.873 | 0.262 | 0.233 | 1.860 |
| Manganese | Mn (ppm) | 407.943 | 75.437 | 219.268 | 960.864 |
| Sodium | Na (wt%) | 0.735 | 0.121 | 0.382 | 1.079 |
| Phosphorus | P (wt%) | 0.035 | 0.007 | 0.016 | 0.066 |
| Lead | Pb (ppm) | 16.071 | 2.168 | 8.423 | 24.872 |
| Selenium | Se (ppm) | 0.141 | 0.038 | 0.100 | 0.308 |
| Titanium | Ti (wt%) | 0.232 | 0.030 | 0.144 | 0.308 |
| Zinc | Zn (ppm) | 36.516 | 6.474 | 15.140 | 59.900 |