Heterogeneous distribution of 60Fe in the early solar nebula: Achondrite evidence

Details Heterogeneous distribution of 60Fe in the early solar nebula: Achondrite evidence Heterogeneous distribution of 60Fe in the early solar nebula: Achondrite evidence

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ep%26s...58.1079s&link_type=abstract

Earth, Planets and Space, Volume 58, p. 1079-1086.

Computer Science

4

Scientific paper

60Fe-60Ni systematics in quenched angrites and two old eucrites were investigated by secondary ion mass spectrometry. The 60Ni/62Ni isotopic compositions were normal within 2σ errors. The inferred initial 60Fe/56Fe ratios for quenched angrites was (6±9)×10-9, and similar upper limit values were also obtained from eucrites. Using the age difference of approximately 5 Ma between the quenched angrites and Ca-Al-rich inclusions, the initial 60Fe/56Fe ratio at the start of the solar system was calculated to be approximately (6±9)×10-8. This initial ratio is significantly smaller than previously published values obtained from chondritic materials, suggesting the heterogeneous distribution of 60Fe in the solar nebula.

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