26Al and rare gases in Allende, Bereba and Juvinas: implications for production rates

W. Hampel, H. Wänke, H. Hofmeister, B. Spettel, G. F. Herzog

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

The 26Al, light rare gas and major and minor element contents of Al-rich and poor samples separated from Allende. Bereba and Junivas have been measured. The production rate of 21Ne from Al (21PAl) is (1.9 ± 0.6) × 21PSi and 22 21PAl = 1.4 ± 0.4. The 3He, 21Ne and 38Ar exposure ages of the eucritic pyroxenes agree suggesting complete cosmogenic gas retention. The eucritic feldspars have lost virtually all 3He and most radiogenic 4He. The equation 26Al = 0.42 ± 0.41 Mg + 2.74 ± 0.21 Si + 4.92 ± 0.51 Al + 1.33 S + 0.24 Ca + 0.03 Fe reproduces within 15% our 26Al measurements and the average values measured in ordinary chondrites without recourse to unusual cosmic-ray effects.

Original languageEnglish (US)
Pages (from-to)539-547
Number of pages9
JournalGeochimica et Cosmochimica Acta
Volume44
Issue number3
DOIs
StatePublished - Mar 1980
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology

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