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Sample F-23
NavDat sample number 5163 · ANDESITE
Sample
| Sample ID | F-23 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | light grey trachyandesite, rhyodacite, and quartz latite domes and flows |
|---|
Location
| Latitude | 38.2687 |
|---|
| Longitude | -119.377 |
|---|
| Location | Little Walker Center |
|---|
| State / province | California |
|---|
| Location comment | erupted along the east and west margins and locally within the center of the caldera |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 9.65 |
|
8.6 |
10.7 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 61.69 | | WT% | XRF |
| TIO2 | 0.7 | | WT% | XRF |
| AL2O3 | 17.77 | | WT% | XRF |
| FE2O3 | 5.37 | | WT% | XRF |
| FEO | 4.83 | | WT% | XRF |
| MNO | 0.11 | | WT% | XRF |
| MGO | 1.61 | | WT% | XRF |
| CAO | 5.79 | | WT% | XRF |
| NA2O | 3.8 | | WT% | XRF |
| K2O | 2.2 | | WT% | XRF |
| P2O5 | 0.33 | | WT% | XRF |
| LOI | 0.52 | | WT% | XRF |
| TOTAL | 99.37 | | WT% | XRF |
| RB | 43.7 | | PPM | XRF |
| SR | 1264 | | PPM | XRF |
