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Ar-Ar Thermochronlogy of Apollo 12 Impact-Melt Breccia 12033,638-1We have undertaken an Ar-Ar thermochronology investigation as part of a coordinated multichronometer analysis of a single Apollo 12 impact- melt breccia to demonstrate the wide range of information that can be obtained for a single complex rock. This has implications for the age of formation, component makeup, and subsequent impact/shock and exposure history of the sample. This study also serves as a capabilities demonstration for the proposed MoonRise Mission [1]. The goal of this investigation is to elucidate the history of this sample through coordinated 40Ar*/39Ar, Sm-Nd, Rb-Sr and zircon 207Pb-206Pb ages along with geochemical and petrographic context on a relatively small (approximately 450 mg) sample. Here, we report preliminary results of the Ar-Ar thermochronology.
Document ID
20170000482
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Crow, C. A. (Lawrence Livermore National Lab. Livermore, CA, United States)
Cassata, W. S. (Lawrence Livermore National Lab. Livermore, CA, United States)
Jolliff, B. L. (Washington Univ. Saint Louis, MO, United States)
Ziegler, R. A. (NASA Johnson Space Center Houston, TX, United States)
Borg, L. E. (Lawrence Livermore National Lab. Livermore, CA, United States)
Shearer, C. K. (New Mexico Univ. Albuquerque, NM, United States)
Date Acquired
January 19, 2017
Publication Date
March 20, 2017
Subject Category
Lunar And Planetary Science And Exploration
Report/Patent Number
JSC-CN-38491
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: The Woodlands, TX
Country: United States
Start Date: March 20, 2017
End Date: March 24, 2017
Sponsors: Universities Space Research Association, Lunar and Planetary Inst.
Funding Number(s)
PROJECT: LLNL Project 17-ERD-001
CONTRACT_GRANT: DE-AC52-07NA27344
CONTRACT_GRANT: NNH14AX56
Distribution Limits
Public
Copyright
Public Use Permitted.

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