Sm-Nd isotopic evolution of chondrites

Details Sm-Nd isotopic evolution of chondrites Sm-Nd isotopic evolution of chondrites

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980e%26psl..50..139j&link_type=abstract

Earth and Planetary Science Letters, vol. 50, no. 1, Oct. 1980, p. 139-155.

Computer Science

179

Chondrites, Meteoritic Composition, Neodymium Isotopes, Radioactive Isotopes, Samarium Isotopes, Achondrites, Basalt, Lunar Evolution, Lunar Rocks, Planetary Evolution, Rare Earth Elements, Meteorites, Chondrites, Evolution, Isotopes, Neodymium, Samarium, Isotopic Ratios, Achondrites, Juvinas Meteorite, Analysis, Data, Samples, Meteorite, Procedure, Murchison Meteorite, Allende Meteorite, Guarena Meteorite, Peace River Meteorite, St. Severin Meteorite, Moon, Earth

Scientific paper

The Nd-143/Nd-144 and Sm-147/Nd-144 ratios measured in 5 chondrites and the Juvinas achondrite correlated with the variation of 4.2% in Sm-147/Nd-144. Most of the spread in the range of these ratios results from small heterogeneities in the chondrites and does not reflect the large-scale volumetric averages. A new set of self-consistent reference values were selected for the 'chrondritic uniform reservoir' (CHUR); the new Sm-147/Nd-144 value is 1.6% higher than the previous value assigned to CHUR using the Juvinas data of Lugmair (1975). The new CHUR curve indicates significant changes in model ages for lunar rocks and in the interpretation of early lunar chronology.

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