| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.990 | 0.449 | 4.181 | 6.155 |
| Arsenic | As (ppm) | 5.419 | 0.537 | 3.683 | 6.821 |
| Calcium | Ca (wt%) | 2.125 | 2.051 | 0.351 | 10.236 |
| Copper | Cu (ppm) | 11.386 | 2.652 | 4.961 | 18.218 |
| Iron | Fe (wt%) | 1.969 | 0.276 | 1.353 | 2.706 |
| Mercury | Hg (ppm) | 0.017 | 0.006 | 0.010 | 0.030 |
| Magnesium | Mg (wt%) | 1.197 | 0.297 | 0.476 | 1.917 |
| Manganese | Mn (ppm) | 355.550 | 50.047 | 238.446 | 524.077 |
| Sodium | Na (wt%) | 0.665 | 0.070 | 0.510 | 0.876 |
| Phosphorus | P (wt%) | 0.044 | 0.008 | 0.031 | 0.079 |
| Lead | Pb (ppm) | 19.314 | 3.508 | 12.245 | 29.505 |
| Selenium | Se (ppm) | 0.391 | 0.466 | 0.102 | 3.063 |
| Titanium | Ti (wt%) | 0.256 | 0.028 | 0.205 | 0.312 |
| Zinc | Zn (ppm) | 39.650 | 7.346 | 25.544 | 58.741 |