Isotopic and compositional constraints on the source of basalt collected from the lunar farside.

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Science Pub Date : 2025-03-21 Epub Date: 2025-02-27 DOI:10.1126/science.adt3332

Xiaochao Che, Tao Long, Alexander Nemchin, Shiwen Xie, Le Qiao, Zengsheng Li, Yiyi Ban, Runlong Fan, Chun Yang, Dunyi Liu

引用次数: 0

Abstract

Volcanism on the Moon has produced surface basalt deposits, which record lunar interior processes. The Chang'e-6 mission retrieved samples from the South Pole-Aitken basin (SPA) on the Moon's far side. We analyzed basalt fragments collected by Chang'e-6 and found that their composition resembles that of low-titanium basalts previously sampled by the Apollo missions. Uranium-lead (U-Pb) dating indicated a basalt age of 2823.0 ± 5.9 million years and a source ²³⁸U/²⁰⁴Pb ratio (μ-value) of 480 ± 56. This high μ-value indicates that the source contained materials that formed during the late stages of lunar magma ocean (LMO) crystallization. The results are consistent with the LMO model, but the Chang'e-6 basalt deviates from the trend in Apollo mission samples of younger basalts having higher μ-values. We suggest that this indicates post-LMO modification of the mantle by the SPA impact.

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从月球远侧采集的玄武岩来源的同位素和成分制约因素。

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Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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