The early chronology of the moon - Evidence for the early collisional history of the solar system

Details The early chronology of the moon - Evidence for the early collisional history of the solar system The early chronology of the moon - Evidence for the early collisional history of the solar system

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977rspta.285...97t&link_type=abstract

(Royal Society, Discussion on the Moon - A New Appraisal from Space Missions and Laboratory Analyses, London, England, June 9-12

Physics

2

Argon Isotopes, Lunar Crust, Lunar Evolution, Lunar Rocks, Radioactive Age Determination, Selenology, Basalt, Breccia, Crystallization, Petrology

Scientific paper

There are two aspects to the early evolution of the lunar crust in the period prior to the extrusion of the mare basalts: (1) the magmatic activity which led to the chemical differentiation of the outer regions of the moon, and (2) the bombardment of the moon by large objects in the period immediately after its formation. The use of Ar-40-Ar-39 age determinations in establishing the chronology of the bombardment is discussed. Attention is also given to the assumption that the younger age of 3.88 plus or minus 0.04 Ga is the upper limit for the Imbrium event.

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