| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.945 | 1.061 | 2.725 | 9.306 |
| Arsenic | As (ppm) | 1.859 | 0.323 | 1.261 | 3.055 |
| Calcium | Ca (wt%) | 0.566 | 0.499 | 0.061 | 2.469 |
| Copper | Cu (ppm) | 11.077 | 2.831 | 5.947 | 25.562 |
| Iron | Fe (wt%) | 2.977 | 0.527 | 1.616 | 4.474 |
| Mercury | Hg (ppm) | 0.054 | 0.009 | 0.029 | 0.074 |
| Magnesium | Mg (wt%) | 0.438 | 0.408 | 0.078 | 2.122 |
| Manganese | Mn (ppm) | 692.720 | 136.985 | 474.846 | 1110.180 |
| Sodium | Na (wt%) | 0.429 | 0.239 | 0.092 | 1.125 |
| Phosphorus | P (wt%) | 0.039 | 0.017 | 0.014 | 0.094 |
| Lead | Pb (ppm) | 31.894 | 5.941 | 20.177 | 62.092 |
| Selenium | Se (ppm) | 0.200 | 0.035 | 0.120 | 0.289 |
| Titanium | Ti (wt%) | 0.685 | 0.047 | 0.587 | 0.873 |
| Zinc | Zn (ppm) | 39.401 | 7.089 | 25.128 | 73.469 |