| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 3.351 | 0.584 | 1.616 | 5.581 |
| Arsenic | As (ppm) | 9.294 | 2.835 | 4.782 | 17.137 |
| Calcium | Ca (wt%) | 0.222 | 0.124 | 0.068 | 0.958 |
| Copper | Cu (ppm) | 10.253 | 2.181 | 5.225 | 18.832 |
| Iron | Fe (wt%) | 2.324 | 0.311 | 1.589 | 3.140 |
| Mercury | Hg (ppm) | 0.199 | 0.409 | 0.011 | 2.884 |
| Magnesium | Mg (wt%) | 0.243 | 0.064 | 0.111 | 0.504 |
| Manganese | Mn (ppm) | 789.554 | 174.982 | 400.208 | 1223.390 |
| Sodium | Na (wt%) | 0.190 | 0.089 | 0.058 | 0.668 |
| Phosphorus | P (wt%) | 0.041 | 0.008 | 0.024 | 0.067 |
| Lead | Pb (ppm) | 15.349 | 3.319 | 7.361 | 30.271 |
| Selenium | Se (ppm) | 0.287 | 0.097 | 0.104 | 0.721 |
| Titanium | Ti (wt%) | 0.232 | 0.038 | 0.124 | 0.343 |
| Zinc | Zn (ppm) | 61.641 | 9.435 | 40.920 | 88.996 |