| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.342 | 0.694 | 1.521 | 5.646 |
| Arsenic | As (ppm) | 5.497 | 2.745 | 1.048 | 16.993 |
| Calcium | Ca (wt%) | 4.361 | 1.734 | 0.246 | 12.571 |
| Copper | Cu (ppm) | 10.446 | 3.617 | 3.405 | 35.235 |
| Iron | Fe (wt%) | 1.271 | 0.423 | 0.468 | 3.690 |
| Mercury | Hg (ppm) | 0.016 | 0.011 | 0.010 | 0.127 |
| Magnesium | Mg (wt%) | 1.154 | 0.485 | 0.191 | 3.415 |
| Manganese | Mn (ppm) | 239.081 | 86.437 | 54.658 | 578.057 |
| Sodium | Na (wt%) | 0.408 | 0.200 | 0.095 | 1.221 |
| Phosphorus | P (wt%) | 0.051 | 0.016 | 0.015 | 0.110 |
| Lead | Pb (ppm) | 16.219 | 2.655 | 8.103 | 25.215 |
| Selenium | Se (ppm) | 0.385 | 0.301 | 0.100 | 2.445 |
| Titanium | Ti (wt%) | 0.139 | 0.034 | 0.069 | 0.272 |
| Zinc | Zn (ppm) | 34.598 | 10.994 | 11.581 | 80.070 |