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Sample 6
NavDat sample number 4456 · MONZONITE
Sample
| Sample ID | 6 |
|---|
| Rock name | MONZONITE |
|---|
| Rock type | PLUTONIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
| Comment | phenocrysts of feldspar, biotite, and hornblende with groundmass of plagioclase and orthoclase, quartz and biotite |
|---|
Location
| Latitude | 44.3563 |
|---|
| Longitude | -103.627 |
|---|
| Location | Gilt Edge |
|---|
| State / province | South Dakota |
|---|
| Volcanic field | Gilt Edge quartz monzonite |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 50 |
|
45 |
55 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 57 | | WT% | GRAV |
| NA2O | 3 | | WT% | AAS |
| MGO | 0.043 | | WT% | AAS |
| K2O | 3 | | WT% | AAS |
| CAO | 0.35 | | WT% | AAS |
| SR87_SR86 | 0.7065 | | | MS |
