This sample belongs to: Amy Moser
Sample Name: PFS2
IGSN: IEAM20007
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: PFS2
Sample Description:
GeoObject Type: Individual Sample
Geoobject Classification:
Collection Method:
Material: Rock
Latitude: 33.630372
Longitude: -115.990269
Sample Comment:
Collector: Amy Moser
Material Classification:
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 |
65.0 |
11.2 |
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 |
| PFS2/IEAM20007-z1 |
zircon |
65.2057476127 |
0.95501422354178 |
788.88 |
228.92 |
N/A |
0.29 |
235.68 |
6.32 |
0.79 |
| PFS2/IEAM20007-z2 |
zircon |
62.139126267801 |
0.919479323917 |
696.09 |
181.97 |
N/A |
0.26 |
209.38 |
18.26 |
0.84 |
| PFS2/IEAM20007-z3 |
zircon |
69.016219924154 |
1.0169193597721 |
475.70 |
134.82 |
N/A |
0.28 |
147.16 |
4.36 |
0.78 |
| PFS2/IEAM20007-z4 |
zircon |
61.983007864287 |
0.9361345695503 |
533.11 |
67.91 |
N/A |
0.13 |
144.07 |
4.06 |
0.78 |
| PFS2/IEAM20007-z5 |
zircon |
62.136155613223 |
0.93921869778649 |
810.46 |
124.96 |
N/A |
0.15 |
207.62 |
2.55 |
0.74 |
| PFS2/IEAM20007-z6 |
zircon |
59.147838303745 |
0.84629905565954 |
567.61 |
306.70 |
N/A |
0.54 |
163.53 |
8.02 |
0.80 |
| PFS2/IEAM20007-z7 |
zircon |
75.440181828002 |
1.111667604632 |
887.11 |
270.56 |
N/A |
0.30 |
308.80 |
5.91 |
0.80 |
filename:22840.xml
