| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.809 | 0.525 | 1.425 | 4.537 |
| Arsenic | As (ppm) | 4.499 | 1.639 | 1.372 | 9.057 |
| Calcium | Ca (wt%) | 0.271 | 0.326 | 0.043 | 1.791 |
| Copper | Cu (ppm) | 9.548 | 5.285 | 1.138 | 30.068 |
| Iron | Fe (wt%) | 1.430 | 0.398 | 0.347 | 2.515 |
| Mercury | Hg (ppm) | 0.052 | 0.008 | 0.031 | 0.078 |
| Magnesium | Mg (wt%) | 0.266 | 0.107 | 0.086 | 0.720 |
| Manganese | Mn (ppm) | 817.803 | 496.138 | 142.429 | 3158.940 |
| Sodium | Na (wt%) | 0.308 | 0.096 | 0.119 | 0.646 |
| Phosphorus | P (wt%) | 0.035 | 0.010 | 0.016 | 0.078 |
| Lead | Pb (ppm) | 37.777 | 14.815 | 20.669 | 103.411 |
| Selenium | Se (ppm) | 0.357 | 0.117 | 0.103 | 0.686 |
| Titanium | Ti (wt%) | 0.277 | 0.027 | 0.228 | 0.362 |
| Zinc | Zn (ppm) | 142.397 | 51.978 | 45.755 | 347.476 |