Knowledge Management System Of Guangzhou Institute of Geochemistry，CAS
| Wang, Zaicong1; Zong, Keqing1; Li, Yiheng1; Li, Jiawei1; He, Qi1; Zou, Zongqi2; Becker, Harry3; Moynier, Frederic4; Day, James M. D.5; Zhang, Wen1; Qian, Yuqi1; Xiao, Long1; Hu, Zhaochu1; She, Zhenbing1; Hui, Hejiu6,7; Wu, Xiang1; Liu, Yongsheng1 | |
| Young KREEP-like mare volcanism from Oceanus Procellarum | |
| Source Publication | GEOCHIMICA ET COSMOCHIMICA ACTA
 |
| ISSN | 0016-7037 |
| 2024-05-15 | |
| Volume | 373Pages:17-34 |
| DOI | 10.1016/j.gca.2024.03.029 |
| Language | 英语 |
| WOS Research Area | Geochemistry & Geophysics |
| Abstract | The Moon's mare volcanism predominantly occurs within the Procellarum KREEP Terrane (PKT), which is widely thought to be associated with KREEP components within the lunar interior. The Chang'e-5 (CE-5) mission sampled a young (2 Ga) mare basalt Em4/P58 unit of northern Oceanus Procellarum. The geochemistry of the CE-5 mare basalt enables assessment of mantle source compositions which are essential to understand the thermo-chemical mechanism for prolonged volcanism during secular cooling of the Moon. Geochemical compositions of the CE-5 bulk soil, breccias, and basalt clasts from various depths within the drill core consistently display high concentrations of incompatible trace elements (ITE: similar to 0.3 x high-K KREEP; similar to 5 mu g/g Th) with KREEP-like inter-element ratios, for example for La/Sm, Nb/Ta, and Zr/Y. Exotic impact ejecta, extensive magma differentiation (<70 % fractional crystallization) and significant assimilation of KREEP materials during magma transit and eruption cannot account for the ITE contents and ratios or radiogenic isotope compositions (e.g., epsilon Nd-initial of + 8 to + 9 and epsilon Hf-initial of + 40 to + 46) of the CE-5 basalts; instead, partial melting of their mantle source played a dominant role. The Chang'e-5 basalt is a chemically evolved low-Ti mare basalt (Mg# of similar to 34) with enriched KREEP-like ITE compositions but high long-term time-integrated Sm/Nd and Lu/Hf ratios, which represent a hitherto unsampled type of mare basalt. It formed by melting of an augite-rich mantle source (late-stage magma ocean cumulates containing > 30-60 % augite, and little or no ilmenite), with a small amount of late-stage interstitial melt that resembles KREEP (similar to 1-1.5 modal %, equivalent to 0.2-0.3 mu g/g Th in the mantle source). The voluminous mare basalts making up the Em4/P58 unit (>1500 km(3)) provide compelling evidence for large-scale, ITE enriched young mare magmatism within Oceanus Procellarum. In combination with remote sensing data and with the unique Th-rich Apollo 12 basalt fragment 12032,366-18 (impact ejecta likely from Oceanus Procellarum), this implies that significant portions of the FeO- and Th-rich mare regions of the western PKT may also have formed in a similar way. |
| Keyword | Chang'e-5 Mare basalt KREEP Lunar young volcanism Oceanus Procellarum |
| WOS ID | WOS:001226487200001 |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.gig.ac.cn/handle/344008/78580 |
| Collection | 同位素地球化学国家重点实验室 |
| Corresponding Author | Wang, Zaicong |
| Affiliation | 1.China Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 3.Free Univ Berlin, Inst Geol Wissensch, Malteserstr 74-100, D-12249 Berlin, Germany 4.Univ Paris Cite, Inst Phys Globe Paris, CNRS, UMR 7154, F-75005 Paris, France 5.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA 6.Nanjing Univ, Sch Earth Sci & Engn, State Key Lab Mineral Deposits Res & Lunar, Nanjing 210023, Peoples R China 7.Nanjing Univ, Planetary Sci Inst, Sch Earth Sci & Engn, Nanjing 210023, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, Zaicong,Zong, Keqing,Li, Yiheng,et al. Young KREEP-like mare volcanism from Oceanus Procellarum[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2024,373:17-34. |
| APA | Wang, Zaicong.,Zong, Keqing.,Li, Yiheng.,Li, Jiawei.,He, Qi.,...&Liu, Yongsheng.(2024).Young KREEP-like mare volcanism from Oceanus Procellarum.GEOCHIMICA ET COSMOCHIMICA ACTA,373,17-34. |
| MLA | Wang, Zaicong,et al."Young KREEP-like mare volcanism from Oceanus Procellarum".GEOCHIMICA ET COSMOCHIMICA ACTA 373(2024):17-34. |
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