| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 7.145 | 0.321 | 6.623 | 8.375 |
| Arsenic | As (ppm) | 4.653 | 0.876 | 2.730 | 6.873 |
| Calcium | Ca (wt%) | 2.134 | 0.196 | 1.651 | 2.619 |
| Copper | Cu (ppm) | 19.994 | 2.214 | 10.012 | 29.606 |
| Iron | Fe (wt%) | 4.001 | 0.481 | 2.755 | 6.438 |
| Mercury | Hg (ppm) | 0.011 | 0.005 | 0.005 | 0.045 |
| Magnesium | Mg (wt%) | 1.034 | 0.136 | 0.601 | 1.354 |
| Manganese | Mn (ppm) | 727.607 | 62.560 | 579.694 | 1054.680 |
| Sodium | Na (wt%) | 2.074 | 0.259 | 1.630 | 2.977 |
| Phosphorus | P (wt%) | 0.104 | 0.009 | 0.090 | 0.155 |
| Lead | Pb (ppm) | 13.014 | 0.742 | 9.404 | 14.997 |
| Selenium | Se (ppm) | 0.102 | 0.007 | 0.100 | 0.163 |
| Titanium | Ti (wt%) | 0.570 | 0.081 | 0.398 | 1.028 |
| Zinc | Zn (ppm) | 73.814 | 6.627 | 60.192 | 108.318 |