Summary: The origin of geochemical diversity of lunar mantle
sources inferred from the combined U­Pb, Rb­Sr, and
Sm­Nd isotope systematics of mare basalt 10017
Amy M. Gaffney a,*, Lars E. Borg a,1
, Yemane Asmerom b
a
Institute of Meteoritics, University of New Mexico, Albuquerque, NM 87131, USA
b
Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, NM 87131, USA
Received 20 April 2006; accepted in revised form 4 May 2007; available online 17 May 2007
Abstract
The results of our combined U­Pb, Rb­Sr, and Sm­Nd isotope study of mare basalt 10017 contribute to the understanding
of the petrogenetic processes involved in the origin of geochemical diversity in lunar mare basalt sources, as well as the U­Pb
isotope systematics of the Moon. The Rb­Sr, Sm­Nd, and 238
U­206
Pb isotope systems yield concordant crystallization ages of
3.633 ± 0.057 Ga, 3.678 ± 0.069 Ga, and 3.616 ± 0.098 Ga, respectively. The 235
U­207
Pb isochron yields an older, though still
concordant, age of 3.80 ± 0.12 Ga. Neither the 206

Source: Asmerom, Yemane - Department of Earth and Planetary Sciences, University of New Mexico

Collections: Geosciences