| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.548 | 0.608 | 1.344 | 5.013 |
| Arsenic | As (ppm) | 4.399 | 0.827 | 2.268 | 7.456 |
| Calcium | Ca (wt%) | 0.229 | 0.088 | 0.074 | 0.492 |
| Copper | Cu (ppm) | 8.591 | 1.915 | 4.616 | 15.545 |
| Iron | Fe (wt%) | 1.527 | 0.479 | 0.770 | 3.452 |
| Mercury | Hg (ppm) | 0.038 | 0.005 | 0.016 | 0.049 |
| Magnesium | Mg (wt%) | 0.166 | 0.058 | 0.070 | 0.386 |
| Manganese | Mn (ppm) | 274.646 | 69.890 | 109.212 | 442.566 |
| Sodium | Na (wt%) | 0.044 | 0.012 | 0.019 | 0.085 |
| Phosphorus | P (wt%) | 0.019 | 0.004 | 0.013 | 0.035 |
| Lead | Pb (ppm) | 13.763 | 2.892 | 4.565 | 18.932 |
| Selenium | Se (ppm) | 0.291 | 0.098 | 0.121 | 0.541 |
| Titanium | Ti (wt%) | 0.212 | 0.035 | 0.125 | 0.328 |
| Zinc | Zn (ppm) | 42.016 | 5.869 | 24.887 | 63.035 |