Publication Date:
2019-07-13
Description:
Sm-Nd whole rock measurements on a variety of KREEP-rich samples from different landing sites are reported. Despite a variation of Nd and Sm concentrations of almost a factor of 3, the Sm-Nd ratios, as well as the Nd-143/Nd-144 values, show an extremely close grouping. No systematic differences between samples from different landing sites are resolved. These results are taken to be indicative of a moon-wide process having been responsible for the generation of the KREEP source reservoir, 4.36 plus or minus 0.06 AE ago, as estimated from model age calculation.
Keywords:
LUNAR AND PLANETARY EXPLORATION
Type:
Lunar and Planetary Science Conference; Mar 13, 1978 - Mar 17, 1978; Houston, TX
Format:
text
Permalink