| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.397 | 1.103 | 2.272 | 9.061 |
| Arsenic | As (ppm) | 1.943 | 0.417 | 0.625 | 2.965 |
| Calcium | Ca (wt%) | 0.204 | 0.053 | 0.066 | 0.319 |
| Copper | Cu (ppm) | 14.313 | 3.706 | 7.179 | 24.903 |
| Iron | Fe (wt%) | 2.744 | 0.377 | 1.945 | 3.937 |
| Mercury | Hg (ppm) | 0.084 | 0.019 | 0.050 | 0.127 |
| Magnesium | Mg (wt%) | 0.182 | 0.059 | 0.094 | 0.377 |
| Manganese | Mn (ppm) | 799.647 | 207.430 | 551.286 | 1329.490 |
| Sodium | Na (wt%) | 0.279 | 0.094 | 0.094 | 0.543 |
| Phosphorus | P (wt%) | 0.039 | 0.007 | 0.020 | 0.056 |
| Lead | Pb (ppm) | 41.644 | 6.192 | 30.208 | 60.883 |
| Selenium | Se (ppm) | 0.251 | 0.082 | 0.102 | 0.567 |
| Titanium | Ti (wt%) | 0.751 | 0.048 | 0.645 | 0.886 |
| Zinc | Zn (ppm) | 42.129 | 8.858 | 26.201 | 71.907 |