This sample belongs to: Doug Walker
Sample Name: BDCSR33
IGSN: JDW000051
Laboratory: KU IGL
Analyst: Brad Didericksen
Instrumental Method - He: none
Instrumental Method Reference - He:
Instrumental Method - U-Th-Sm: none
Instrumental Method Reference - U-Th-Sm:
Alpha Ejection Correction Method: none
Alpha Ejection Correction Method Reference:
Mineral: apatite
Comment:
238U Decay Constant: 1.55125E-10
238U Decay Constant Error:
235U Decay Constant: 9.8485E-10
235U Decay Constant Error:
232Th Decay Constant : 4.9475E-11
232Th Decay Constant Error:
230Th Decay Constant:
230Th Decay Constant Error:
238U/235U: 137.88
Decay Constant Reference: Steiger, R.H. and Jager, E., 1977, Subcommission on geochronology: Convention on the use of decay constants in geo- and cosmochronology. Earth and Planetary Science Letters, v. 36, no. 3, p. 359-362.
147Sm Decay Constant: 0.00
147Sm Decay Constant Error:
147Sm Decay Constant Reference: Lugmair, G.W., and Marti, K., 1978, Lunar initial 143Nd/144Nd: differential evolution of the lunar crust and mantle: Earth and Planetary Science Letter, v. 39, p. 349-357.
Decay Constant Comment:
Sample ID: BDCSR33
Sample Description: Not Provided
GeoObject Type: Grab
Geoobject Classification: Not Provided
Collection Method: Hand Sample
Material: Rock
Latitude: 35.7558
Longitude: -117.2161
Sample Comment:
Collector: Brad D. Didericksen and Doug Walker
Material Classification: Not Provided
Primary Location Name: Slate Range
Primary Location Type: Not Provided
Location Description: Not Provided
Locality: Not Provided
Locality Description: Not Provided
Country: Not Provided
Provice: Not Provided
County: Not Provided
City Or Township: Not Provided
Platform: Not Provided
Platform ID: Not Provided
Original Archival Institution: not provided
Original Archival Contact: not provided
Most Recent Archival Institution: UT Austin
Most Recent Archival Contact: not provided
| Analysis Purpose |
Value |
Error |
Age Type |
MSWD |
Age Error Systematic |
Included Analyses |
Comment |
| Cooling |
6 |
0.9 |
weighted mean of mulitple aliquots (AEC) |
|
|
2,4,5 |
|
Data Reduction Parameters
Spike Type U-Th-Sm:
Spike Type He:
Standard Mineral:
Standard Mineral Reference:
Standard True Age:
Standard True Age Error:
Standard Measured Age:
Standard Measured Age Error:
Data Reduction Comment:
| Fraction Name |
Mineral |
Age, Ma |
err., Ma |
U (ppm) |
Th (ppm) |
147Sm (ppm) |
Th/U |
He (nmol/g) |
Mass (ug) |
Ft |
| BDCSR33-1 |
apatite |
16.3681566736 |
0.818407833679 |
14.6638960499 |
45.9740626029 |
0 |
3.14 |
1.15178571429 |
0.5 |
0.51 |
| BDCSR33-2 |
apatite |
5.77498035427 |
0.288749017714 |
31.7390657543 |
56.2348512404 |
0 |
1.77 |
0.951236263736 |
1.3 |
0.67 |
| BDCSR33-3 |
apatite |
20.2157391823 |
1.01078695912 |
7.53342746361 |
43.0002046464 |
0 |
5.71 |
0.904017857143 |
0.4 |
0.47 |
| BDCSR33-4 |
apatite |
7.04094480604 |
0.352047240302 |
23.1906617775 |
80.2353743951 |
0 |
3.46 |
0.837053571429 |
0.4 |
0.52 |
| BDCSR33-5 |
apatite |
5.23215042871 |
0.261607521436 |
22.6818321328 |
51.1923447032 |
0 |
2.26 |
0.625 |
0.8 |
0.63 |
filename:14224.xml
