On the Origin of Noble Gas Anomalies in Canyon Diablo Graphite

Author

Jane Hanisch Bennett
Oliver Manuel, Missouri University of Science and TechnologyFollow

Abstract

Activation analyses on Canyon Diablo graphite show an iodine and uranium content of 337 ± 35 ppb and 108 ± 21 ppb, respectively. The ¹²⁹I-¹²⁹Xe formation interval for the graphite is calculated and found to agree with the formation intervals reported for stone meteorites. During exposure to cosmic rays the Abee enstatite chondrite is shown to be ≈ 50 times more effective than Canyon Diablo in producing epithermal neutrons. The ⁸⁶Kr anomaly in Canyon Diablo graphite and other meteorites is compared to an unexplained ⁸⁶Kr excess reported in pile-irradiated chondrites.

Recommended Citation

J. H. Bennett and O. Manuel, "On the Origin of Noble Gas Anomalies in Canyon Diablo Graphite," Earth and Planetary Science Letters, vol. 3, pp. 95 - 100, Elsevier, Sep 1967.

The definitive version is available at https://doi.org/10.1016/0012-821X(67)90018-0

Department(s)

Chemistry

International Standard Serial Number (ISSN)

0012-821X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1967 Elsevier, All rights reserved.

Publication Date

01 Sep 1967