| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.651 | 0.405 | 1.812 | 3.938 |
| Arsenic | As (ppm) | 3.511 | 0.971 | 1.245 | 7.406 |
| Calcium | Ca (wt%) | 0.534 | 0.198 | 0.251 | 1.462 |
| Copper | Cu (ppm) | 17.301 | 12.109 | 6.013 | 74.369 |
| Iron | Fe (wt%) | 1.504 | 0.281 | 0.856 | 3.126 |
| Mercury | Hg (ppm) | 0.062 | 0.012 | 0.031 | 0.098 |
| Magnesium | Mg (wt%) | 0.209 | 0.099 | 0.095 | 0.731 |
| Manganese | Mn (ppm) | 593.881 | 153.700 | 286.809 | 1107.190 |
| Sodium | Na (wt%) | 0.761 | 0.159 | 0.488 | 1.323 |
| Phosphorus | P (wt%) | 0.031 | 0.007 | 0.015 | 0.058 |
| Lead | Pb (ppm) | 122.406 | 156.260 | 31.922 | 1035.090 |
| Selenium | Se (ppm) | 0.155 | 0.047 | 0.100 | 0.344 |
| Titanium | Ti (wt%) | 0.700 | 0.152 | 0.276 | 1.124 |
| Zinc | Zn (ppm) | 34.986 | 15.306 | 20.270 | 106.406 |