中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Multiple lithic clasts in lunar breccia Northwest Africa 7948 and implication for the lithologic components of lunar crust

文献类型:期刊论文

作者Xiaojia ZENG;  Katherine H. JOY;  Shijie LI;  John F. PERNET-FISHER;  Xiongyao LI;  Dayl J. P. MARTIN;  Yang LI;  Shijie WANG
刊名Meteoritics & Planetary Science
出版日期2018
卷号53期号:5页码:1030-1050
英文摘要

This study presents the petrography, mineralogy, and bulk composition of lunar regolith breccia meteorite Northwest Africa (NWA) 7948. We identify a range of lunar lithologies including basaltic clasts (very low-titanium and low-titanium basalts), feldspathic lithologies (ferroan anorthosite, magnesian-suite rock, and alkali suite), granulites, impact melt breccias (including crystalline impact melt breccias, clast-bearing impact melt breccias, and glassy melt breccias), as well as regolith components (volcanic glass and impact glass). A compositionally unusual metal-rich clast was also identified, which may represent an impact melt lithology sourced from a unique Mg-suite parent rock. NWA 7948 has a mingled bulk rock composition (Al2O3 = 21.6 wt% and FeO = 9.4 wt%) and relatively low concentrations of incompatible trace elements (e.g., Th = 1.07 ppm and Sm = 2.99 ppm) compared with Apollo regolith breccias. Comparing the bulk composition of the meteorite with remotely sensed geochemical data sets suggests that the sample was derived from a region of the lunar surface distal from the nearside Th-rich Procellarum KREEP Terrane. Our investigations suggest that it may have been ejected from a nearside highlands-mare boundary (e.g., around Mare Crisium or Orientale) or a cryptomare region (e.g., Schickard-Schiller or Mare smythii) or a farside highlands-mare boundary (e.g., Mare Australe, Apollo basin in the South Pole-Aitken basin). The distinctive mineralogical and geochemical features of NWA 7948 suggest that the meteorite may represent lunar material that has not been reported before, and indicate that the lunar highlands exhibit wide geological diversity.

语种英语
源URL[http://ir.gyig.ac.cn/handle/42920512-1/8769]  
专题地球化学研究所_月球与行星科学研究中心
作者单位1.University of Chinese Academy of Sciences, Beijing 10049, China
2.Center for Lunar and Planetary Sciences, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
3.School of Earth and Environmental Sciences, University of Manchester, Manchester M13 9PL, UK
4.Key Laboratory of Lunar and Deep Space Exploration, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
5.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
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GB/T 7714
Xiaojia ZENG;Katherine H. JOY;Shijie LI;John F. PERNET-FISHER;Xiongyao LI;Dayl J. P. MARTIN;Yang LI;Shijie WANG. Multiple lithic clasts in lunar breccia Northwest Africa 7948 and implication for the lithologic components of lunar crust[J]. Meteoritics & Planetary Science,2018,53(5):1030-1050.
APA Xiaojia ZENG;Katherine H. JOY;Shijie LI;John F. PERNET-FISHER;Xiongyao LI;Dayl J. P. MARTIN;Yang LI;Shijie WANG.(2018).Multiple lithic clasts in lunar breccia Northwest Africa 7948 and implication for the lithologic components of lunar crust.Meteoritics & Planetary Science,53(5),1030-1050.
MLA Xiaojia ZENG;Katherine H. JOY;Shijie LI;John F. PERNET-FISHER;Xiongyao LI;Dayl J. P. MARTIN;Yang LI;Shijie WANG."Multiple lithic clasts in lunar breccia Northwest Africa 7948 and implication for the lithologic components of lunar crust".Meteoritics & Planetary Science 53.5(2018):1030-1050.

入库方式: OAI收割

来源:地球化学研究所

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