资源环境科技发展态势分析平台

The currently available Apollo-returned granitic lithology is restricted to only the nearside of the Moon [e.g., Procellarum KREEP Terrane (PKT)]. In contrast, lunar meteorites represent randomly ejected crustal material, and they extend our understanding of the lunar magmatic history through time and space. Here, we report a 4321.5 ± 5.2 Ma (2σ) granitic fragment found in lunar basaltic breccia meteorite Northwest Africa 10447, which is compositionally similar to the regoliths from the Moon's Non-PKT regions. This granitic fragment has crystallization age similar to the oldest (∼4.32 Ga) granites sampled during the Apollo 12 and 17 missions, and adds to the growing evidence of ancient silicic volcanism on the Moon. In addition, this newly identified granitic fragment in the Th- and TiO₂- poor breccia NWA 10447 provides evidence for that lunar granite may occur outside of the PKT of the Moon (i.e., the mare region with low Th and TiO₂ contents).