This sample belongs to: Amy Moser
Sample Name: PCFS6
IGSN: IEAM20002
Laboratory: Arizona Radiogenic Helium Dating Laboratory
Analyst: Amy Moser, Alexis Ault, Uttam Chowdury, Pete Reiners
Instrumental Method - He: diode laser, quadrupole mass spectrometer
Instrumental Method Reference - He: Fish Canyon Tuff zircon
Instrumental Method - U-Th-Sm: isotope dilution ICP-MS
Instrumental Method Reference - U-Th-Sm: Fish Canyon Tuff zircon
Alpha Ejection Correction Method: Hourigan et al. (2005)
Alpha Ejection Correction Method Reference:
Mineral: zircon
Comment:
238U Decay Constant: 1.55125E-10
238U Decay Constant Error:
235U Decay Constant: 9.84850E-10
235U Decay Constant Error:
232Th Decay Constant : 4.94750E-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: 6.54E-12
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: PCFS6
Sample Description:
GeoObject Type: Individual Sample
Geoobject Classification: Gneiss
Collection Method:
Material: Rock
Latitude: 33.616639
Longitude: -115.998731
Sample Comment:
Collector: Amy Moser
Material Classification: Gneiss
Primary Location Name: Mecca Hills
Primary Location Type: Canyon
Location Description:
Locality: Mecca Hills Wilderness
Locality Description:
Country: United States
Provice: California
County: Riverside
City Or Township: Mecca
Platform:
Platform ID:
Original Archival Institution: Utah State University
Original Archival Contact: amoser1@fandm.edu
Most Recent Archival Institution: Utah State University
Most Recent Archival Contact: alexis.ault@usu.edu
| Analysis Purpose |
Value |
Error |
Age Type |
MSWD |
Age Error Systematic |
Included Analyses |
Comment |
| cooling |
24.2 |
5.0 |
average age with standard error |
|
|
z1, z2, z3, z4, z5, z6, z7 |
|
Data Reduction Parameters
Spike Type U-Th-Sm: 233U-229Th-147Nd-90Zr
Spike Type He: 3He
Standard Mineral: zircon
Standard Mineral Reference: Fish Canyon Tuff
Standard True Age: 28.3
Standard True Age Error: 0.8
Standard Measured Age:
Standard Measured Age Error:
Data Reduction Comment: mass calculated from [Zr] and stoichiometry (Guenthner et al., 2016)
| Fraction Name |
Mineral |
Age, Ma |
err., Ma |
U (ppm) |
Th (ppm) |
147Sm (ppm) |
Th/U |
He (nmol/g) |
Mass (ug) |
Ft |
| PCFS6/IEAM20002-z1 |
zircon |
19.951859012952 |
0.2722620937419 |
149.07 |
170.71 |
N/A |
1.15 |
16.15 |
7.22 |
0.80 |
| PCFS6/IEAM20002-z2 |
zircon |
23.075482104437 |
0.31078968032636 |
74.03 |
80.28 |
N/A |
1.08 |
9.65 |
18.51 |
0.84 |
| PCFS6/IEAM20002-z3 |
zircon |
27.748439673614 |
0.34786381910029 |
57.51 |
134.13 |
N/A |
2.33 |
11.45 |
22.20 |
0.86 |
| PCFS6/IEAM20002-z4 |
zircon |
26.412837410787 |
0.38714766940074 |
668.40 |
181.68 |
N/A |
0.27 |
83.49 |
11.75 |
0.82 |
| PCFS6/IEAM20002-z5 |
zircon |
23.528229680833 |
0.3438784367109 |
572.93 |
161.80 |
N/A |
0.28 |
62.68 |
9.10 |
0.81 |
| PCFS6/IEAM20002-z6 |
zircon |
24.181815792645 |
0.36339221082717 |
1072.63 |
104.36 |
N/A |
0.10 |
121.57 |
19.11 |
0.85 |
| PCFS6/IEAM20002-z7 |
zircon |
24.279578292433 |
0.34940340025671 |
1335.18 |
542.74 |
N/A |
0.41 |
151.62 |
7.54 |
0.79 |
filename:22834.xml
