Other
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984e%26psl..71..195c&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 71, no. 1, Nov. 1984, p. 195-199. Research supported by the Institut
Other
6
Achondrites, Geochronology, Nuclear Particles, Particle Tracks, Asteroids, Calcium Phosphates, Cosmic Rays, Plutonium Isotopes
Scientific paper
The Brachina meteorite, which was until recently classified as a chassignite, is presently subjected to a nuclear particle track study of its various phases. Detected fission tracks that are due to the decay of Pu-244, whose T(1/2) is 82 million years, indicate that Brachina formed about 4.5 billion years ago in a parent body which was probably asteroidal in size. On the basis of the present results and of evidence independently adduced by other researchers, it is concluded that there is no need to postulate a Martian origin for this meteorite.
Crozaz Ghislaine
Pellas Paul
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