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Sample F-12
NavDat sample number 5157 · ANDESITE
Sample
| Sample ID | F-12 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | medium to light grey trachyandesites |
|---|
Location
| Latitude | 38.3258 |
|---|
| Longitude | -119.394 |
|---|
| Location | Little Walker Center |
|---|
| State / province | California |
|---|
| Location comment | erupted on top of the darker trachyandesites or onto sediments contained within 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 | 57.74 | | WT% | XRF |
| TIO2 | 0.84 | | WT% | XRF |
| AL2O3 | 18.13 | | WT% | XRF |
| FE2O3 | 6.46 | | WT% | XRF |
| FEO | 5.81 | | WT% | XRF |
| MNO | 0.11 | | WT% | XRF |
| MGO | 2.79 | | WT% | XRF |
| CAO | 5.82 | | WT% | XRF |
| NA2O | 3.88 | | WT% | XRF |
| K2O | 2.96 | | WT% | XRF |
| P2O5 | 0.41 | | WT% | XRF |
| LOI | 0.41 | | WT% | XRF |
| TOTAL | 99.16 | | WT% | XRF |
| RB | 72.3 | | PPM | XRF |
| SR | 998 | | PPM | XRF |
