Sample Name: 171-J250
IGSN: IE3280004
Laboratory: UTChron
Analyst: Nikki Seymour/Rudra Chatterjee
Instrumental Method - He:
Instrumental Method Reference - He:
Instrumental Method - U-Th-Sm:
Instrumental Method Reference - U-Th-Sm:
Alpha Ejection Correction Method:
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: 171-J250
Sample Description:
GeoObject Type: Individual Sample
Geoobject Classification: Intermediate
Collection Method:
Material: Rock
Latitude: -25.92029493
Longitude: -70.24260621
Sample Comment:
Collector: Nikki Seymour/John Singleton
Material Classification: Intermediate
Primary Location Name: Cerro Concha Granodiorite
Primary Location Type: Pluton
Location Description:
Locality: Atacama Fault System
Locality Description:
Country: Chile
Provice: Antofagasta
County: n/a
City Or Township: Taltal
Platform:
Platform ID:
Original Archival Institution:
Original Archival Contact:
Most Recent Archival Institution: Colorado State University
Most Recent Archival Contact: John Singleton

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: