Josephinite: A Terrestrial Alloy With Radiogenic Xenon-129 And The Noble Gas Imprint Of Iron Meteorites

Author

R. G. Downing
E. W. Hennecke
Oliver Manuel, Missouri University of Science and TechnologyFollow

Abstract

Analyses of noble gases released by stepwise heating of Josephinite reveal two radiogenic components, radiogenic ¹²⁹Xe ≈ 1x10^-12ccSTP/g and radiogenic ⁴⁰Ar ≈ lx10⁻⁶ccSTP/g, and the following components of trapped noble gases: He with ³He/⁴He ≈ 4x10⁻⁵, Ne with ²⁰Ne/²²Ne = 10.5, Ar with ⁴⁰Ar/³⁶Ar = 3x10², and Kr and Xe with isotopic compositions similar to those observed in iron meteorites. The excess of ⁴⁰Ar and literature values of K in bulk Josephinite yield an apparent K-Ar age of ≈ 4.6x10⁹ years. © 1977, GEOCHEMICAL SOCIETY OF JAPAN. All rights reserved.

Recommended Citation

R. G. Downing et al., "Josephinite: A Terrestrial Alloy With Radiogenic Xenon-129 And The Noble Gas Imprint Of Iron Meteorites," Geochemical Journal, vol. 11, no. 4, pp. 219 - 229, J-Stage, Jan 1977.

The definitive version is available at https://doi.org/10.2343/geochemj.11.219

Department(s)

Chemistry

Publication Status

Free Access

International Standard Serial Number (ISSN)

0016-7002

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2023 J-Stage, All rights reserved.

Publication Date

01 Jan 1977