| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 2.029 | 0.554 | 0.569 | 3.163 |
| Arsenic | As (ppm) | 2.921 | 0.411 | 1.401 | 3.844 |
| Calcium | Ca (wt%) | 0.310 | 0.186 | 0.042 | 0.939 |
| Copper | Cu (ppm) | 7.236 | 3.856 | 1.002 | 17.935 |
| Iron | Fe (wt%) | 1.042 | 0.269 | 0.327 | 1.700 |
| Mercury | Hg (ppm) | 0.013 | 0.007 | 0.010 | 0.053 |
| Magnesium | Mg (wt%) | 0.200 | 0.070 | 0.047 | 0.383 |
| Manganese | Mn (ppm) | 251.227 | 95.679 | 58.504 | 493.630 |
| Sodium | Na (wt%) | 0.215 | 0.111 | 0.026 | 0.604 |
| Phosphorus | P (wt%) | 0.012 | 0.003 | 0.005 | 0.020 |
| Lead | Pb (ppm) | 10.175 | 2.391 | 4.074 | 15.523 |
| Selenium | Se (ppm) | 0.116 | 0.022 | 0.100 | 0.192 |
| Titanium | Ti (wt%) | 0.177 | 0.032 | 0.071 | 0.261 |
| Zinc | Zn (ppm) | 16.674 | 3.754 | 9.004 | 29.070 |