| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.561 | 0.224 | 0.132 | 1.399 |
| Arsenic | As (ppm) | 1.739 | 0.636 | 0.397 | 6.360 |
| Calcium | Ca (wt%) | 0.029 | 0.014 | 0.007 | 0.102 |
| Copper | Cu (ppm) | 5.562 | 3.391 | 1.138 | 27.359 |
| Iron | Fe (wt%) | 0.325 | 0.099 | 0.102 | 0.699 |
| Mercury | Hg (ppm) | 0.020 | 0.008 | 0.011 | 0.064 |
| Magnesium | Mg (wt%) | 0.016 | 0.006 | 0.004 | 0.046 |
| Manganese | Mn (ppm) | 98.904 | 32.000 | 31.376 | 213.011 |
| Sodium | Na (wt%) | 0.012 | 0.004 | 0.004 | 0.039 |
| Phosphorus | P (wt%) | 0.019 | 0.006 | 0.006 | 0.036 |
| Lead | Pb (ppm) | 9.042 | 2.660 | 3.010 | 19.939 |
| Selenium | Se (ppm) | 0.167 | 0.044 | 0.105 | 0.387 |
| Titanium | Ti (wt%) | 0.460 | 0.043 | 0.294 | 0.569 |
| Zinc | Zn (ppm) | 8.772 | 3.644 | 2.529 | 25.680 |