Cosmogenic neon produced from sodium in meteoritic minerals

Details Cosmogenic neon produced from sodium in meteoritic minerals Cosmogenic neon produced from sodium in meteoritic minerals

Sep 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975e%26psl..27..191s&link_type=abstract

Earth and Planetary Science Letters, vol. 27, no. 2, Sept. 1975, p. 191-199.

Other

9

Feldspars, Meteoritic Composition, Minerals, Neon Isotopes, Sodium, Chondrites, Cosmology, Mass Ratios, Mass Spectroscopy, Rocks

Scientific paper

Cosmogenic neon in sodium-rich oligoclase feldspar from the ordinary chondrites St. Severin and Guarena is characterized by an unusually high Ne-22/Ne-21 ratio (about 1.50). This high ratio is due to the cosmogenic Ne-22/Ne-21 production ratio in sodium, which is two to three times the production ratio in any other target element. The striking enrichment of Ne-22 relative to Ne-21 in sodium arises from enhanced indirect production from Na-23 via Na-22. The unusual composition of cosmogenic neon in sodium and sodium-rich minerals explains the high Na-22/Ne-21 ratios observed in inclusions of the Allende carbonaceous chondrite and during low-temperature extraction of neon from ordinary chondrites.

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