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Sample F-65
NavDat sample number 5183 · ANDESITE
Sample
| Sample ID | F-65 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | light grey trachyandesite, rhyodacite, and quartz latite domes and flows |
|---|
Location
| Latitude | 38.2948 |
|---|
| Longitude | -119.349 |
|---|
| 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 | 61.48 | | WT% | XRF |
| TIO2 | 0.73 | | WT% | XRF |
| AL2O3 | 16.57 | | WT% | XRF |
| FE2O3 | 5.32 | | WT% | XRF |
| FEO | 4.72 | | WT% | XRF |
| MNO | 0.1 | | WT% | XRF |
| MGO | 2.51 | | WT% | XRF |
| CAO | 5.26 | | WT% | XRF |
| NA2O | 3.97 | | WT% | XRF |
| K2O | 2.94 | | WT% | XRF |
| P2O5 | 0.22 | | WT% | XRF |
| LOI | 0.08 | | WT% | XRF |
| TOTAL | 99.1 | | WT% | XRF |
| RB | 78.2 | | PPM | XRF |
| SR | 876 | | PPM | XRF |
| SR87_SR86 | 0.7053 | | | MS |
