Ar-40 intercept values and young apparent /K-40/-/Ar-40/ ages of five Apollo 15 fines

Details Ar-40 intercept values and young apparent /K-40/-/Ar-40/ ages of five Apollo 15 fines Ar-40 intercept values and young apparent /K-40/-/Ar-40/ ages of five Apollo 15 fines

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977e%26psl..34..159j&link_type=abstract

Earth and Planetary Science Letters, vol. 34, no. 1, Feb. 1977, p. 159-164.

Computer Science

Apollo 15 Flight, Argon Isotopes, Fines, Lunar Landing Sites, Lunar Rocks, Potassium 40, Age Factor, Basalt, Contamination, Lunar Composition

Scientific paper

Correlations between Ar-40 and Ar-36 from size fractions of three Apollo 15 fines (15071, 15421, 15501) have been obtained. The Ar-40 intercept values of these fines and of 15091 and 15601 are generally lower than what one would expect for fines resulting from the comminution of rocks having ages of about 3.3 billion yr, typical for basalts of the landing site. This is interpreted to be the result of contamination by ray material from the Copernican age (equal or less than about 1 billion yr) craters, Autolycus and Aristillus, north of the landing site.

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