Rubidium-87/Strontium-87 Age of Juvinas Basaltic Achondrite and Early Igneous Activity in the Solar System

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Science  07 Feb 1975:
Vol. 187, Issue 4175, pp. 436-438
DOI: 10.1126/science.187.4175.436


A (4.60±0.07)x109 year internal isochron has been drawn for the achondrite Juvinas by the rubidium-87/strontium-87 method. Earlier petrographic investigation of achondrites supplemented by a new ion microprobe study of Juvinas strongly suggest an igneous origin for this class of meteorites. The results thus indicate that igneous activity may have rapidly followed the formation of the achondrites' parent body 4.6x109 years ago.