| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 0.587 | 0.271 | 0.160 | 1.684 |
| Arsenic | As (ppm) | 1.583 | 0.455 | 0.781 | 3.412 |
| Calcium | Ca (wt%) | 0.018 | 0.007 | 0.006 | 0.053 |
| Copper | Cu (ppm) | 2.418 | 1.250 | 1.092 | 10.274 |
| Iron | Fe (wt%) | 0.332 | 0.102 | 0.110 | 0.707 |
| Mercury | Hg (ppm) | 0.014 | 0.007 | 0.010 | 0.061 |
| Magnesium | Mg (wt%) | 0.028 | 0.010 | 0.009 | 0.059 |
| Manganese | Mn (ppm) | 74.370 | 47.532 | 16.990 | 398.228 |
| Sodium | Na (wt%) | 0.023 | 0.012 | 0.003 | 0.061 |
| Phosphorus | P (wt%) | 0.006 | 0.004 | 0.003 | 0.033 |
| Lead | Pb (ppm) | 10.406 | 4.166 | 3.505 | 30.885 |
| Selenium | Se (ppm) | 0.153 | 0.058 | 0.101 | 0.447 |
| Titanium | Ti (wt%) | 0.277 | 0.083 | 0.072 | 0.717 |
| Zinc | Zn (ppm) | 8.244 | 2.813 | 3.441 | 21.056 |