87 Rb- 87 Sr age of fragments and soils from the lunar sea of fertility

Details 87 Rb- 87 Sr age of fragments and soils from the lunar sea of fertility 87 Rb- 87 Sr age of fragments and soils from the lunar sea of fertility

Sep 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973gecoa..37.2025b&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 37, Issue 9, pp.2025-2031

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Scientific paper

The Luna 16 materials were dated by the Rb-Sr method. An internal isochron age of 3.4 ± 0.2 has been determined for a 6 mg fragment. The Luna 16 total soil is poorer in radiogenic Sr than any other analyzed soil from the Moon. Apollo 14 and 15 soils have also been studied; all of them fall nearly on a 4.65 b.y. isochron with the ADOR initial 87 Sr / 86 Sr ratio. A comparison of the integrated Rb / Sr of the basalt source region and the Rb / Sr of the rocks suggests that these basaltic fragments have been generated with only minor Rb / Sr fractionation. The existence of an old Rb-rich subcrust which contaminated the basalts is also in agreement with the present results.

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