Title

Noble Gases in Silicate Inclusions of Kodaikanal

Abstract

Analyses of the noble gases from silicate inclusion of Kodaikanal show extensive loss of the lighter cosmogenic gases. A comparison of the cosmogenic gases in the silicates with reported concentrations of cosmogenic noble gases in the metal phase indicates an exposure age between 7.5 and 40 million years if a chondritic composition is assumed for the silicates. An upper limit of 6 × 10-13 cm3 STP radiogenic 129Xe per gram is almost three orders of magnitude less than the radiogenic 129Xe in Toluca silicates. This agrees with the different K-Ar and Rb-Sr ages reported for the inclusions in these two meteorites.

Department(s)

Chemistry

International Standard Serial Number (ISSN)

0012821X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1968 Elsevier, All rights reserved.


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