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Sample F-81
NavDat sample number 5196 · ANDESITE
Sample
| Sample ID | F-81 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | light grey trachyandesite, rhyodacite, and quartz latite domes and flows |
|---|
Location
| Latitude | 38.2839 |
|---|
| Longitude | -119.485 |
|---|
| Location | Mt Emma |
|---|
| 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 |
|---|
| 8.75 |
|
8.6 |
8.9 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 61.5 | | WT% | XRF |
| TIO2 | 0.8 | | WT% | XRF |
| AL2O3 | 18.28 | | WT% | XRF |
| FE2O3 | 5.17 | | WT% | XRF |
| FEO | 4.65 | | WT% | XRF |
| MNO | 0.1 | | WT% | XRF |
| MGO | 1.79 | | WT% | XRF |
| CAO | 4.7 | | WT% | XRF |
| NA2O | 3.56 | | WT% | XRF |
| K2O | 4.06 | | WT% | XRF |
| P2O5 | 0 | | WT% | XRF |
| LOI | 2.35 | | WT% | XRF |
| TOTAL | 99.96 | | WT% | XRF |
| RB | 122 | | PPM | XRF |
| SR | 1034 | | PPM | XRF |
