Jiang, Yun and Kang, Jinting and Liao, Shiyong and Elardo, Stephen M. and Zong, Keqing and Wang, Sijie and Nie, Chang and Li, Peiyi and Yin, Zongjun and Huang, Fang and Hsu, Weibiao (2023) Fe and Mg Isotope Compositions Indicate a Hybrid Mantle Source for Young Chang’E 5 Mare Basalts. The Astrophysical Journal Letters, 945 (2). L26. ISSN 2041-8205
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Abstract
The Chang'E 5 (CE-5) samples represent the youngest mare basalt ever known and provide an access into the late lunar evolution. Recent studies have revealed that CE-5 basalts are the most evolved lunar basalts, yet controversy remains over the nature of their mantle sources. Here we combine Fe and Mg isotope analyses with a comprehensive study of petrology and mineralogy on two CE-5 basalt clasts. These two clasts have a very low Mg# (∼29) and show similar Mg isotope compositions to Apollo low-Ti mare basalts as well as intermediate TiO2 and Fe isotope compositions between low-Ti and high-Ti mare basalts. Fractional crystallization or evaporation during impact cannot produce such geochemical signatures that otherwise indicate a hybrid mantle source that incorporates both early- and late-stage lunar magma ocean (LMO) cumulates. Such a hybrid mantle source would be also compatible with the KREEP-like Rare Earth Elements pattern of CE-5 basalts. Overall, our new Fe–Mg isotope data highlight the role of late LMO cumulate for the generation of young lunar volcanism.
Item Type: | Article |
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Subjects: | South Asian Archive > Physics and Astronomy |
Depositing User: | Unnamed user with email support@southasianarchive.com |
Date Deposited: | 19 Apr 2023 07:45 |
Last Modified: | 24 Jun 2024 05:13 |
URI: | http://article.journalrepositoryarticle.com/id/eprint/610 |