| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.474 | 0.524 | 6.287 | 8.752 |
| Arsenic | As (ppm) | 5.416 | 2.295 | 1.205 | 12.732 |
| Calcium | Ca (wt%) | 2.817 | 1.089 | 0.886 | 4.868 |
| Copper | Cu (ppm) | 57.779 | 15.642 | 19.704 | 113.159 |
| Iron | Fe (wt%) | 8.560 | 1.300 | 5.034 | 11.275 |
| Mercury | Hg (ppm) | 0.038 | 0.020 | 0.010 | 0.132 |
| Magnesium | Mg (wt%) | 2.530 | 0.858 | 0.893 | 4.032 |
| Manganese | Mn (ppm) | 1077.570 | 171.832 | 544.439 | 1373.410 |
| Sodium | Na (wt%) | 1.020 | 0.183 | 0.559 | 1.476 |
| Phosphorus | P (wt%) | 0.092 | 0.023 | 0.041 | 0.177 |
| Lead | Pb (ppm) | 11.874 | 5.849 | 2.261 | 31.194 |
| Selenium | Se (ppm) | 0.449 | 0.238 | 0.111 | 1.272 |
| Titanium | Ti (wt%) | 0.896 | 0.171 | 0.519 | 1.442 |
| Zinc | Zn (ppm) | 121.545 | 11.306 | 87.683 | 160.192 |