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Sample 1-25D
NavDat sample number 4771 · PHONOLITE
Sample
| Sample ID | 1-25D |
|---|
| 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 | 44.353 |
|---|
| Longitude | -103.868 |
|---|
| 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 | 17.8771 | | WT% | NAA |
| FE2O3 | 2.9818 | | WT% | NAA |
| MGO | 1.7492 | | WT% | NAA |
| CAO | 0.5549 | | WT% | NAA |
| NA2O | 8.1291 | | WT% | NAA |
| TIO2 | 0.2848 | | WT% | NAA |
| MNO | 0.1706 | | WT% | NAA |
| BA | 360.51 | | PPM | NAA |
| CE | 606.129 | | PPM | NAA |
| CO | 2.1108 | | PPM | NAA |
| CR | 5.4053 | | PPM | NAA |
| CS | 8.0934 | | PPM | NAA |
| EU | 4.0825 | | PPM | NAA |
| HF | 8.6275 | | PPM | NAA |
| LA | 200.816 | | PPM | NAA |
| LU | 0.9214 | | PPM | NAA |
| RB | 122.623 | | PPM | NAA |
| SB | 0.3393 | | PPM | NAA |
| SC | 0.1182 | | PPM | NAA |
| SM | 15.9832 | | PPM | NAA |
| TA | 2.5166 | | PPM | NAA |
| TH | 80.5 | | PPM | NAA |
| V | 26.9729 | | PPM | NAA |
| YB | 4.7158 | | PPM | NAA |
