| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 6.593 | 0.595 | 4.887 | 7.939 |
| Arsenic | As (ppm) | 12.128 | 2.799 | 5.873 | 19.428 |
| Calcium | Ca (wt%) | 1.128 | 0.174 | 0.634 | 1.709 |
| Copper | Cu (ppm) | 25.381 | 6.192 | 13.920 | 49.531 |
| Iron | Fe (wt%) | 2.821 | 0.390 | 1.970 | 3.742 |
| Mercury | Hg (ppm) | 0.067 | 0.008 | 0.042 | 0.088 |
| Magnesium | Mg (wt%) | 0.841 | 0.111 | 0.453 | 1.083 |
| Manganese | Mn (ppm) | 608.495 | 145.540 | 319.326 | 1206.710 |
| Sodium | Na (wt%) | 0.704 | 0.107 | 0.488 | 0.960 |
| Phosphorus | P (wt%) | 0.082 | 0.009 | 0.057 | 0.108 |
| Lead | Pb (ppm) | 23.197 | 2.858 | 16.581 | 33.345 |
| Selenium | Se (ppm) | 0.662 | 0.113 | 0.383 | 0.970 |
| Titanium | Ti (wt%) | 0.292 | 0.020 | 0.236 | 0.343 |
| Zinc | Zn (ppm) | 109.592 | 16.918 | 67.451 | 162.903 |