| Geographic location |
-82, 36
82°
'
"
W,
36°
'
"
N
Mitchell county,
NC
Knoxville or Johnson City
1:250,000 scale map quadrangle
Accurate to within 30 minutes (~30 miles)
LOCATION OF SAMPLE UNCERTAIN, PROBABLY COLLECTED NEAR SPRUCE PINE--COMPILER
|
|---|---|
| Rock name | Pegmatite(?) |
| Description | SAMPLE WAS PROBABLY COLLECTED FROM A PEGMATITE--COMPILER |
| Laboratories | University of Toronto |
| Compiler name | Kish, S.A. |
| Date compiled | 1979 07 |
| Precision of location | Accurate to within 30 minutes (~30 miles) |
| Location comment | LOCATION OF SAMPLE UNCERTAIN, PROBABLY COLLECTED NEAR SPRUCE PINE--COMPILER |
| Bibliographic reference | Collins, C.B., Farquhar, R.M., and Russell, R.D., 1954, Isotopic Constitution Of Radiogenic Leads and The Measurment Of Geological Time: Geological Society of America Bulletin, v. 65, p. 1-22 |
| (click for info) | |
| Geologic map unit | -82, 36 |
| Nearby scientific data | Find additional scientific data near this location |
| Age estimates | 0 ± 40Ma by 207Pb/206Pb
|
|---|---|
| Rock or mineral analyzed | uraninite-pitchblende |
| Analytical details | |
| Lab sample ID | 82 |
| 204Pb concentration | 0.007 |
| 206Pb concentration | 94.48 |
| 207Pb concentration | 5.14 |
| 208Pb concentration | 0.4 |
| Comments on analysis | DECAY CONSTANTS: LAMBDA 238=1.54 E-10; LAMBDA 235=9.76 E-10 |
| Comments | 207PB/206PB AGE IS PROBABLY A MINIMUM INTRUSIVE AGE--COMPILER |