Table 2. Elemental composition of parent material for elements of interest.
Elemental percentages obtained via lithium borate fusion and XRF. Parent material chemistry is based on 9 samples—3 tephra samples, 2 bedrock samples, and 1 gravel sample from the bedrock soil interface.
| Si (%) |
Al (%) |
Fe (%) |
P (%) |
Ca (%) |
Mg (%) |
Na (%) |
K (%) |
Ti (%) |
Nb (ppm) |
|
|---|---|---|---|---|---|---|---|---|---|---|
| Mean Value | 22.61 | 9.14 | 8.51 | 0.40 | 4.94 | 2.45 | 3.40 | 1.46 | 1.73 | 60.44 |
| Standard Deviation | 0.76 | 0.23 | 0.32 | 0.02 | 0.21 | 0.16 | 0.26 | 0.26 | 0.11 | 1.59 |