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Sample KT-80-57
NavDat sample number 10022 · DACITE
Sample
| Sample ID | KT-80-57 |
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| Rock name | DACITE |
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| Rock type | VOLCANIC |
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| Composition | FELSIC |
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| Material | IGNEOUS |
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| Comment | Gray- to buff-colored lava, often pumiceous; plagioclase An30-50, biotite, orthopyroxene, hornblende, quartz, olivine, and titanomagnetite phenocrysts set in a pilotaxitic microcrystalline groundmass dominated by plagioclase microlites. |
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Location
| Latitude | 41.4816 |
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| Longitude | -121.786 |
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| State / province | California |
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| Volcanic field | Medicine Lake Highland |
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| Location comment | SE portion of Nine Buck Butte |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
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| 3.2 |
|
3.04 |
3.36 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 68.29 | | WT% | XRF |
| AL2O3 | 16.73 | | WT% | XRF |
| FEO | 1.8 | | WT% | XRF |
| FE2O3 | 1.25 | | WT% | XRF |
| TIO2 | 0.39 | | WT% | XRF |
| MNO | 0.07 | | WT% | XRF |
| MGO | 1.04 | | WT% | XRF |
| CAO | 3.26 | | WT% | XRF |
| NA2O | 4.05 | | WT% | XRF |
| K2O | 2.4 | | WT% | XRF |
| P2O5 | 0.07 | | WT% | XRF |
