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Sample PR 4A-92
NavDat sample number 42383 · PEGMATITE
Sample
| Sample ID | PR 4A-92 |
|---|
| Rock name | PEGMATITE |
|---|
| Rock type | PLUTONIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
Location
| Latitude | 38.1648 |
|---|
| Longitude | -122.917 |
|---|
| State / province | California |
|---|
| Location comment | Tonalite and granodiorite of McClure's and Kehoe Beaches |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 79.8 |
|
71.82 |
87.78 |
|
|
Analyses
WHOLE ROCK
| Item | Value | Std. dev. | Unit | Method |
|---|
| RB | 156 | | PPM | EDXRF |
| SR | 206 | | PPM | EDXRF |
| RB_SR | 0.756 | | | MS |
| RB87_SR86 | 2.188 | | | MS |
| SR87_SR86 | 0.7107 | | | MS |
| SR87_SR86_INITIAL | 0.70794 | | | MS |
| RB | 239 | | PPM | MS-ID |
| SR | 275 | | PPM | MS-ID |
| RB_SR | 0.869 | | | MS-ID |
| RB87_SR86 | 2.515 | | | MS-ID |
| SR87_SR86 | 0.71114 | | | MS |
| SR87_SR86_INITIAL | 0.70794 | | | MS |
References
- Kistler, R W; Champion, D E (2001) Rb-Sr whole-rock and mineral ages, K-Ar, (super 40) Ar/ (super 39) Ar, and U-Pb mineral ages, and strontium, lead, neodymium, and oxygen isotopic compositions for granitic rocks from the Salinian Composite Terrane, California. Open-File Report - U. S. Geological Survey. 2001.
