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Solar cosmic ray produced neon in lunar soils and their implication for gas-rich meteorite studiesCharacteristic neon isotopic ratios, produced due to solar cosmic ray spallation (SCR) in lunar soils, are useful in deciphering and estimating the relative contributions of SCR and GCR spallation. To delineate these features, etched mineral grains from mature and immature lunar soils (14148 and 61221 respectively) were analyzed using mass spectrometry. The SF-Ne composition deduced in this work agrees with that obtained from earlier etched lunar pyroxene studies. The data points for mature soil 14148 define a line which significantly deviates from the 61221 tie line. This deviation is attributed to the presence of SCR spallation component. In this context, neon isotopic compositions (step-wise heating) in Pantar and Leighton dark portions were studied and compared with that of Fayetteville. The meteorite data points deviate significantly from the tie line joining SF-Ne and GCR (pyroxene) end points. This deviation is attributed to SCR-spallation in gas-rich chondrites.
Document ID
19850007327
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Nautiyal, C. M.
(Physical Research Lab. Ahmedabad, India)
Rao, M. N.
(Physical Research Lab. Ahmedabad, India)
Date Acquired
August 12, 2013
Publication Date
January 1, 1984
Publication Information
Publication: Lunar and Planetary Institute The 47th Ann. Meteoritical Soc. Meeting
Subject Category
Space Radiation
Accession Number
85N15636
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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