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Sample PR 2a-92
NavDat sample number 42372 · PEGMATITE
Sample
| Sample ID | PR 2a-92 |
|---|
| Rock name | PEGMATITE |
|---|
| Rock type | PLUTONIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
Location
| Latitude | 38.1753 |
|---|
| Longitude | -122.926 |
|---|
| State / province | California |
|---|
| Location comment | granodiorite of Tomales Point. |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 87 |
|
78.3 |
95.7 |
|
|
Analyses
WHOLE ROCK
| Item | Value | Std. dev. | Unit | Method |
|---|
| RB | 147 | | PPM | EDXRF |
| SR | 375 | | PPM | EDXRF |
| RB_SR | 0.391 | | | MS |
| RB87_SR86 | 1.132 | | | MS |
| SR87_SR86 | 0.70808 | | | MS |
| SR87_SR86_INITIAL | 0.70668 | | | 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.
