Computer Science
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993sci...259.1138s&link_type=abstract
Science (ISSN 0036-8075), vol. 259, no. 5098, p. 1138-1142.
Computer Science
111
Iron Isotopes, Metallicity, Meteoritic Composition, Solar System Evolution, Basalt, Magma, Minerals, Planetary Evolution, Meteorites, Solar System, Iron 60, Chervony Kut, Samples, Meteorite, Laboratory Studies, Nickel 60, Isotopes, Abundance, Decay, Melting, Concentration, Isotopic Ratios, Chronology, Planetesimals, Nuclides, Heat, Eucrites, Achondrites, Stony Meteorites, Procedure, Analysis, Temperature, Timescale
Scientific paper
Isotopic analyses of nickel in samples from the differentiated meteorite Chervony Kut revealed the presence of relative excesses of Ni-60 ranging from 2.4 up to 50 parts per 10 exp 4. These isotopic excesses are from the decay of the now extinct short-lived nuclide Fe-60 and provide clear evidence for the existence of Fe-60 over large scales in the early solar system. Not only was Fe-60 present at the time of melting and differentiation (that is, Fe-Ni fractionation) of the parent body of Chervony Kut but also later at the time when basaltic magma solidified at or near the surface of the planetesimal. The inferred abundance of Fe-60 suggests that its decay alone could have provided sufficient heat to melt small (diameters of several hundred kilometers) planetary bodies shortly after their accretion.
Lugmair Guenter W.
Shukolyukov Alex
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