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Sample 5
NavDat sample number 4635 · ANDESITE
Sample
| Sample ID | 5 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | differentiated from other andesites by brecciation, sub-equal amounts of hornblende and biotite phenocrysts, and darker color of hornblende and biotite |
|---|
Location
| Latitude | 39.179 |
|---|
| Longitude | -121.789 |
|---|
| Location | De Witt's volcano |
|---|
| State / province | California |
|---|
| Volcanic field | Sutter Buttes |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 1.75 |
|
1.5 |
2 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 59.77 | | WT% | XRF |
| TIO2 | 0.62 | | WT% | XRF |
| AL2O3 | 17.98 | | WT% | XRF |
| FEO | 2.92 | | WT% | XRF |
| FE2O3 | 2.41 | | WT% | XRF |
| MNO | 0.12 | | WT% | XRF |
| CAO | 6.23 | | WT% | XRF |
| MGO | 2.72 | | WT% | XRF |
| NA2O | 3.92 | | WT% | XRF |
| K2O | 2.19 | | WT% | XRF |
| P2O5 | 0.19 | | WT% | XRF |
| H2O_MINUS | 0.38 | | WT% | XRF |
| H2O_PLUS | 0.62 | | WT% | XRF |
| TOTAL | 100.07 | | WT% | XRF |
