| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.458 | 0.964 | 2.954 | 7.356 |
| Arsenic | As (ppm) | 10.245 | 4.286 | 1.809 | 24.096 |
| Calcium | Ca (wt%) | 2.148 | 0.740 | 0.804 | 5.232 |
| Copper | Cu (ppm) | 16.530 | 5.010 | 3.548 | 34.293 |
| Iron | Fe (wt%) | 2.380 | 0.647 | 1.048 | 4.333 |
| Mercury | Hg (ppm) | 0.032 | 0.010 | 0.010 | 0.067 |
| Magnesium | Mg (wt%) | 1.050 | 0.197 | 0.536 | 1.599 |
| Manganese | Mn (ppm) | 345.305 | 86.068 | 92.052 | 659.714 |
| Sodium | Na (wt%) | 0.909 | 0.346 | 0.244 | 2.679 |
| Phosphorus | P (wt%) | 0.071 | 0.009 | 0.041 | 0.097 |
| Lead | Pb (ppm) | 21.471 | 3.503 | 10.605 | 34.841 |
| Selenium | Se (ppm) | 0.813 | 0.732 | 0.108 | 4.725 |
| Titanium | Ti (wt%) | 0.259 | 0.054 | 0.111 | 0.380 |
| Zinc | Zn (ppm) | 70.645 | 19.064 | 29.787 | 139.330 |