| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 5.431 | 0.590 | 3.388 | 6.871 |
| Arsenic | As (ppm) | 10.507 | 6.276 | 2.538 | 68.312 |
| Calcium | Ca (wt%) | 2.137 | 0.923 | 0.402 | 9.987 |
| Copper | Cu (ppm) | 33.420 | 21.594 | 4.529 | 407.703 |
| Iron | Fe (wt%) | 2.846 | 0.926 | 1.309 | 11.227 |
| Mercury | Hg (ppm) | 0.051 | 0.054 | 0.010 | 1.044 |
| Magnesium | Mg (wt%) | 0.996 | 0.384 | 0.293 | 2.816 |
| Manganese | Mn (ppm) | 490.846 | 227.670 | 105.873 | 2341.480 |
| Sodium | Na (wt%) | 0.717 | 0.225 | 0.185 | 1.755 |
| Phosphorus | P (wt%) | 0.088 | 0.030 | 0.031 | 0.324 |
| Lead | Pb (ppm) | 23.294 | 11.630 | 9.292 | 201.674 |
| Selenium | Se (ppm) | 0.771 | 0.468 | 0.112 | 4.052 |
| Titanium | Ti (wt%) | 0.258 | 0.049 | 0.145 | 0.480 |
| Zinc | Zn (ppm) | 122.799 | 111.560 | 47.050 | 2162.220 |