Computer Science
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980natur.283..256l&link_type=abstract
Nature, vol. 283, Jan. 17, 1980, p. 256-259.
Computer Science
32
Mass Spectroscopy, Meteoritic Composition, Milky Way Galaxy, Osmium Isotopes, Radioactive Age Determination, Rhenium Isotopes, Solar System, Abundance, Chondrites, Chronology, Iron Meteorites, Meteorites, Chronology, Isotopic Ratios, Iron Meteorites, Ages, Solar System, Galaxies, Rhenium/Osmium, Osmium/Osmium, Data, Mass Spectrometry, Chondrites, Dating Techniques, Experiments, Techniques, Samples, Meteorite, Tlacotepec Meteorite, Canyon Diablo Meteorite, Coahuila Meteorite, Casas Grandes Meteorite, Henbury
Scientific paper
Using isotope dilution mass spectrometry, the Re-187/Os-186, Os-187/Os-186 ratios of five iron meteorites of various groups, and one ordinary chondrite have been determined. These results show that iron meteorites and ordinary chondrites were formed within a short time. The Re-187 decay constant is determined as 1.62 plus or minus 0.03 x 10 to the -11th per year and the Os-187/Os-186 isotopic ratio at the origin of the solar system as 0.805 plus or minus 0.011. These values are used to compute limits for the age of the Galaxy between 13,300 and 22,400 Myr.
Allègre Claude J.
Birck Jean-Louis
Luck Mck. J.
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