Exposure History of Separated Phases from the Kapoeta Meteorite

Caffee, M W; Nishiizumi, K; Mazarik, J

doi:10.1111/j.1945-5100.2001.tb01884.x

Title: Exposure History of Separated Phases from the Kapoeta Meteorite

Conference · Fri Jan 14 00:00:00 EST 2000

DOI:https://doi.org/10.1111/j.1945-5100.2001.tb01884.x· OSTI ID:757462

Caffee, M W; Nishiizumi, K; Mazarik, J

The cosmogenic radionuclides, {sup 10}Be (1.5 Ma), {sup 26}Al (0.705 Ma), {sup 36}Cl (0.301 Ma), and {sup 53}Mn (3.7 Ma) were measured in selected clasts and matrix samples from the howardite Kapoeta. This work is an extension of that based on {sup 10}Be and {sup 26}Al [1]. Recent work based on measurements of cosmogenic {sup 21}Ne suggest the possibility of a complex recent exposure history for Kapoeta. The measurement of these radionuclides, in conjunction with production rates based on Monte Carlo calculations, can constrain exposure conditions and durations. Taken together, the radionuclide data are entirely consistent with a single stage 4{pi} exposure lasting {approximately} 3 Ma.

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Research Organization:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Organization:: USDOE Office of Defense Programs (DP) (US)

DOE Contract Number:: W-7405-ENG-48

OSTI ID:: 757462

Report Number(s):: UCRL-JC-132357-Rev-1; TRN: AH200114%%297

Resource Relation:: Journal Volume: 36; Journal Issue: 3; Conference: 31st Lunar and Planetary Science Conference, Houston, TX (US), 03/13/2000--03/17/2000; Other Information: PBD: 14 Jan 2000

Country of Publication:: United States

Language:: English

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Title: Exposure History of Separated Phases from the Kapoeta Meteorite

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