| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.194 | 0.378 | 2.201 | 4.015 |
| Arsenic | As (ppm) | 8.309 | 1.571 | 5.621 | 13.092 |
| Calcium | Ca (wt%) | 1.888 | 1.076 | 0.212 | 3.924 |
| Copper | Cu (ppm) | 9.120 | 1.329 | 5.229 | 11.991 |
| Iron | Fe (wt%) | 2.273 | 0.274 | 1.633 | 2.944 |
| Mercury | Hg (ppm) | 0.042 | 0.003 | 0.037 | 0.050 |
| Magnesium | Mg (wt%) | 0.442 | 0.209 | 0.148 | 1.063 |
| Manganese | Mn (ppm) | 1600.380 | 388.377 | 824.312 | 2383.950 |
| Sodium | Na (wt%) | 0.161 | 0.056 | 0.043 | 0.228 |
| Phosphorus | P (wt%) | 0.377 | 0.314 | 0.040 | 1.351 |
| Lead | Pb (ppm) | 21.162 | 2.125 | 13.478 | 24.484 |
| Selenium | Se (ppm) | 0.339 | 0.098 | 0.110 | 0.597 |
| Titanium | Ti (wt%) | 0.247 | 0.054 | 0.139 | 0.342 |
| Zinc | Zn (ppm) | 60.570 | 10.541 | 32.641 | 86.195 |