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Sample 1-20
NavDat sample number 4706 · PHONOLITE
Sample
| Sample ID | 1-20 |
|---|
| Rock name | PHONOLITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | many anorthoclase phenocrysts and fewer albite phenocrysts; groundmass of plagioclase with distinct flow texture and little or no quartz; nepheline occurs in phenocrysts; pyroxene also present |
|---|
Location
| Latitude | 44.3526 |
|---|
| Longitude | -103.866 |
|---|
| State / province | South Dakota |
|---|
| Volcanic field | Black Hill Tertiary igneous province |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 47 |
|
40 |
55 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| AL2O3 | 13.1581 | | WT% | NAA |
| FE2O3 | 1.9508 | | WT% | NAA |
| MGO | 1.4353 | | WT% | NAA |
| CAO | 2.8993 | | WT% | NAA |
| NA2O | 5.4001 | | WT% | NAA |
| TIO2 | 0.2779 | | WT% | NAA |
| MNO | 0.061 | | WT% | NAA |
| BA | 308.513 | | PPM | NAA |
| CE | 341.19 | | PPM | NAA |
| CO | 1.8268 | | PPM | NAA |
| CR | 5.6731 | | PPM | NAA |
| CS | 2.3297 | | PPM | NAA |
| EU | 3.6242 | | PPM | NAA |
| HF | 9.3551 | | PPM | NAA |
| LA | 171.812 | | PPM | NAA |
| LU | 0.3213 | | PPM | NAA |
| RB | 103.416 | | PPM | NAA |
| SB | 0.7457 | | PPM | NAA |
| SC | 0.6344 | | PPM | NAA |
| SM | 14.702 | | PPM | NAA |
| TA | 3.8632 | | PPM | NAA |
| TH | 112.893 | | PPM | NAA |
| V | 28.6404 | | PPM | NAA |
| YB | 3.7582 | | PPM | NAA |
