Beryllium-10 contents of shergottites, nakhlites, and Chassigny

Details Beryllium-10 contents of shergottites, nakhlites, and Chassigny Beryllium-10 contents of shergottites, nakhlites, and Chassigny

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50.2405p&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 50, Nov. 1986, p. 2405-2409. NSF-supported research.

Computer Science

5

Beryllium 10, Meteoritic Composition, Nuclides, Mass Spectroscopy

Scientific paper

Accelerator mass spectrometry gives the following Be-10 contents (dpm/kg) for the SNC meteorites: Shergotty, 13.0 + or - 1.5 and 17.3 + or - 2.7; Zagami, 18.6 + or - 2.5 and 20.0 + or - 3.2; ALHA 77005, 15 + or - 3; EETA 79001A, 7.8 + or - 1.1 and 6.3 + or - 0.5; EETA 79001B, 8.5 + or - 1.1; Nakhla, 19.7 + or - 3.3; Lafayette, 18.1 + or - 2.5; Governador Valadares, 25.6 + or - 3.6; Chassigny, 20.5 + or - 3.1. The Be-10 contents of the NC meteorites indicate that significant accumulation of cosmogenic nuclides occurred in decimeter rather than planetary-size bodies. The agreement of the He-3, Ne-21, and Be-10 exposure ages of the shergottites also supports small-body irradiation. A long terrestrial age for EETA 79001 appears unlikely.

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