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Sample JM-84
NavDat sample number 9424 · SYENITE
Sample
| Sample ID | JM-84 |
|---|
| Rock name | SYENITE |
|---|
| Rock type | PLUTONIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Comment | trachytic orientation of sanidine; phenocrysts of sanidine, aegerine-augite; also contains analcite, melanite; groundmass composed primarily of sanidine, aegerine, and nepheline |
|---|
Location
| Latitude | 47.25 |
|---|
| Longitude | -109.025 |
|---|
| State / province | Montana |
|---|
| Volcanic field | Linster Peak Dome |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 46.7 |
|
42.8 |
50.6 |
|
|
Analyses
Whole rock
| Item | Value | Std. dev. | Unit | Method |
|---|
| SIO2 | 59.07 | | WT% | XRF |
| TIO2 | 0.4 | | WT% | XRF |
| AL2O3 | 17.31 | | WT% | XRF |
| FE2O3 | 2.37 | | WT% | TIT |
| FEO | 2.02 | | WT% | TIT |
| MNO | 0.11 | | WT% | XRF |
| MGO | 0.68 | | WT% | XRF |
| CAO | 3.15 | | WT% | XRF |
| NA2O | 5.18 | | WT% | AAS |
| K2O | 7.44 | | WT% | XRF |
| P2O5 | 0.08 | | WT% | XRF |
| LOI | 1.23 | | WT% | XRF |
| TOTAL | 99.04 | | WT% | XRF |
| RB | 236.4 | | PPM | XRF |
| SR | 1274.5 | | PPM | XRF |
| Y | 25 | | PPM | XRF |
| ZR | 247.4 | | PPM | XRF |
| NB | 23.2 | | PPM | XRF |
| SIO2 | 61.72 | | WT% | XRF |
| AL2O3 | 17.44 | | WT% | XRF |
| TIO2 | 0.45 | | WT% | XRF |
| FEOT | 4.4 | | WT% | XRF |
| MNO | 0.12 | | WT% | XRF |
| CAO | 2.94 | | WT% | XRF |
| MGO | 0.7 | | WT% | XRF |
| K2O | 7.02 | | WT% | XRF |
| NA2O | 5.04 | | WT% | XRF |
| P2O5 | 0.1 | | WT% | XRF |
| TOTAL | 99.93 | | WT% | XRF |
| RB | 221 | | PPM | XRF |
| SR | 806 | | PPM | XRF |
