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Sample T144
NavDat sample number 6892 · LAMPROPHYRE
Sample
| Sample ID | T144 |
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| Rock name | LAMPROPHYRE |
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| Rock type | PLUTONIC |
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| Composition | EXOTIC |
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| Material | IGNEOUS |
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| Comment | highly altered, hydrothermally; associated with an intrusive breccia; occurs in dike; aphanitic, porphyritic; small phenocrysts of pyroxene and larger ones of biotite and opaques; groundmass of anhedral patches of analcime and radiating columnar aggregates of thompsonite; also K-feldspar in groundmass |
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Location
| Latitude | 44.3801 |
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| Longitude | -104.055 |
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| Location | Black Hills |
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| State / province | South Dakota |
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| Volcanic field | Tinton District |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 48 |
|
38 |
59 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 43.2 | | WT% | XRF |
| AL2O3 | 12.3 | | WT% | XRF |
| FE2O3 | 3.4 | | WT% | XRF |
| FEO | 11.3 | | WT% | XRF |
| MGO | 4.8 | | WT% | XRF |
| CAO | 12.6 | | WT% | XRF |
| NA2O | 1 | | WT% | XRF |
| K2O | 7.6 | | WT% | XRF |
| TIO2 | 1.8 | | WT% | XRF |
| P2O5 | 1.7 | | WT% | XRF |
| MNO | 0.3 | | WT% | XRF |
| CO2 | 8.5 | | WT% | XRF |
| SO3 | 0.7 | | WT% | XRF |
