DOAJ Open Access 2025

Impact-induced mixing generated the stratified soils of the Lunar South Pole Aitken Basin

Haijun Cao Jian Chen Xuejin Lu Jiaqi Kong Le Qiao +6 lainnya

Abstrak

Abstract The Mg-pyroxene annulus in the South Pole–Aitken (SPA) basin holds crucial information about the lunar crustal evolution, yet its mineralogy and origin remain debate. Here we analyzed the mineralogy, exogenic ejecta, and soil evolution of the 2.8-billion-year-old Chang’e-6 samples from the SPA basin by Raman spectroscopic technique. The Chang’e-6 soils contain mare basalts and noritic exogenous ejecta (31–40 vol%), likely from Chaffee S crater. The derived mineralogy (63–67 vol% plagioclase and 25–27 vol% low-Ca pyroxene) of Mg-pyroxene annulus indicates a ferrous noritic lithology, attributed to a mixture of differentiated norite from the SPA impact melt sheet and re-deposited SPA crust (61–63 vol%). Ejecta accumulation facilitated glass formation, while small impacts induced quartz metamorphism, mixing mature basaltic soil with fresh ejecta, and leading to the fine-grained CE-6 soil. These findings provide new insights into the origin of SPA mafic anomalies and farside mare soil evolution.

Topik & Kata Kunci

Geology Environmental sciences

Penulis (11)

Haijun Cao

Jian Chen

Xuejin Lu

Jiaqi Kong

Le Qiao

Chengxiang Yin

Changqing Liu

Hongkun Qu

Xiaohui Fu

Yanqing Xin

Zongcheng Ling

Format Sitasi

APA MLA BibTeX

Cao, H., Chen, J., Lu, X., Kong, J., Qiao, L., Yin, C. et al. (2025). Impact-induced mixing generated the stratified soils of the Lunar South Pole Aitken Basin. https://doi.org/10.1038/s43247-025-02441-8

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Informasi Jurnal

Tahun Terbit: 2025
Sumber Database: DOAJ
DOI: 10.1038/s43247-025-02441-8
Akses: Open Access ✓