| Geographic location |
-82.034444, 36.025833
82°
2'
4"
W,
36°
1'
33"
N
Avery county,
NC
Carvers Gap
1:24,000 scale map quadrangle
Accurate to within 1 minute (~1 mile)
C. RIDGE MINE (CHARLES RIDGE MINE ?--COMPILER) 3100 FT ELEVATION OF CHARLES RIDGE, 1.4 MILES (2.3 KM) DUE WEST OF PLUMTREE, SPRUCE PINE DISTRICT (SEE LOCATION 108, USGS PP-577--COMPILER)
|
|---|---|
| Rock name | Pegmatite |
| Description | PLAGIOCLASE (AN 22)-QUARTZ-MUSCOVITE-PERTHITE PEGMATITE; ACCESSORY GARNET, APATITE, AND EPIDOTE (SEE USGS PP-577, P. 36-37--COMPILER) |
| Laboratories | Penn State University |
| Compiler name | Kish, S.A. |
| Date compiled | 1979 03 |
| Precision of location | Accurate to within 1 minute (~1 mile) |
| Location comment | C. RIDGE MINE (CHARLES RIDGE MINE ?--COMPILER) 3100 FT ELEVATION OF CHARLES RIDGE, 1.4 MILES (2.3 KM) DUE WEST OF PLUMTREE, SPRUCE PINE DISTRICT (SEE LOCATION 108, USGS PP-577--COMPILER) |
| Bibliographic reference | Deuser, W.G., and Herzog, L.F., 1962, Rubidium-strontium age determinations of muscovites and biotites from pegmatites of the Blue Ridge and Piedmont: Journal of Geophysical Research, v. 67, p. 1997-2004 |
| (click for info) | |
| Geologic map unit | -82.034444, 36.025833 |
| Nearby scientific data | Find additional scientific data near this location |
| Age estimate | 340.66 ± 17Ma |
|---|---|
| Type of analysis | Conventional Rb-Sr (assumed initial 87Sr/86Sr) % RADIOGENIC 87SR, 87RB/86SR, 87SR/86SR, AND INITIAL 87SR/86SR CALCULATED BY COMPILER
|
| Rock or mineral analyzed | muscovite GREENISH MICA
|
| Analytical details | |
| Lab sample ID | 12M |
| Decay constants | 0.0000139* |
| Rubidium concentration | 610.8 ppm |
| Strontium concentration | 6.11 ppm |
| Initial 87Sr/86Sr | 0.7113 |
| Radiogenic 87Sr | 0.84 |
| Ratio 87Rb/86Sr | 289.1 |
| Ratio 87Sr/86Sr | 2.1154 |
| Normal? | N |