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A Zircon U-Pb Study of the Evolution of Lunar KREEP (2007)

Meyer, Charles ; Nemchin, A. ; Pidgeon, R. ; [et al.]

In: CASI

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Publication Date: 2018-06-11

Description: SIMS U-Pb analyses show that zircons from breccias from Apollo 14 and Apollo 17 have essentially identical age distributions in the range 4350 to 4200 Ma but, whereas Apollo 14 zircons additionally show ages from 4200 to 3900 Ma, the Apollo 17 samples have no zircons with ages 〈4200 Ma. The zircon results also show an uneven distribution with distinct peaks of magmatic activity. In explaining these observations we propose that periodic episodes of KREEP magmatism were generated from a primary reservoir of KREEP magma, which contracted over time towards the centre of Procellarum KREEP terrane.

Keywords: Lunar and Planetary Science and Exploration

Format: application/pdf

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