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Heterogeneous martian mantle: Evidence from petrology, mineral chemistry, and in situ U-Pb chronology of the basaltic shergottite Northwest Africa 8653

文献类型：期刊论文

作者Wu, Yunhua4; Hsu, Weibiao3; Li, Qiu-Li2; Che, Xiaochao1; Liao, Shiyong3
刊名GEOCHIMICA ET COSMOCHIMICA ACTA
出版日期2021-09-15
卷号309页码:352-365
关键词Martian shergottite Magmatic process Trace element geochemistry U-Pb chronology
ISSN号0016-7037
DOI10.1016/j.gca.2021.05.011
英文摘要Shergottites were derived from mantle reservoirs through various magmatic processes, recording geochemical signatures of the martian mantle. But the U-Pb isotopic system of shergottites remains obscured including the geological significance of Pb isotope composition, the role of martian Pb contamination, and other factors. Here we present in situ U-Pb and/or Pb-Pb analyses on minerals of the basaltic shergottite Northwest Africa (NWA) 8653 after detailed petrological and mineralogical studies. The aims of the project are to evaluate the formation process, the crystallization age as well as the characteristic Pb isotope composition of NWA 8653. Texture, major and trace element composition plus geochemical modeling suggest that NWA 8653 is an enriched shergottite derived from mixing of depleted (e.g., fractionated Yamato 980459) and enriched components (e.g., NWA 1068) in the mantle, instead of crustal assimilation. U-Pb and Pb-Pb isotopes of baddeleyite reveal a young crystallization age (187.6 +/- 8.0 Ma). Pb isotope compositions of maskelynite, feldspathic intergrowth, and the majority of phosphate cluster near the predicted initial Pb and a 4.1 Ga isochron. For these minerals, calculations suggest that mixing of Pb from different reservoirs with mu (U-238/(204)pb) varying from 1.4 to 4.7 could explain the apparent 4.1 Ga isochron in young shergottites. Variable extents of mixing among mantle sources could further increase the isotopic heterogeneity of sher-gottites. Our results demonstrate that NWA 8653 was derived from a heterogeneous mantle source in terms of trace element and isotope composition. Mixing of Pb from different reservoirs in the mantle plays an important role in shaping Pb in minerals with negligible U. This study provides additional geochemical evidence for a highly heterogeneous martian mantle. (C) 2021 Elsevier Ltd. All rights reserved.
WOS关键词ISOTOPIC SYSTEMATICS ; TRACE-ELEMENTS ; FRACTIONAL CRYSTALLIZATION ; SNC METEORITES ; ICP-MS ; RB-SR ; PETROGENESIS ; ZAGAMI ; AGES ; BADDELEYITE
资助项目B-type Strategic Priority Program of the Chinese Academy of Sciences[XDB41000000] ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration[D020202] ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration[D020302] ; National Natural Science Foundation of China[42003053] ; National Natural Science Foundation of China[41973060] ; National Natural Science Foundation of China[41773059] ; National Natural Science Foundation of China[42073060] ; China Postdoctoral Science Foundation[2020M672946] ; Minor Planet Foundation of China
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000680530800006
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Minor Planet Foundation of China ; Minor Planet Foundation of China ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Minor Planet Foundation of China ; Minor Planet Foundation of China ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Minor Planet Foundation of China ; Minor Planet Foundation of China ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; B-type Strategic Priority Program of the Chinese Academy of Sciences ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; pre-research Project on Civil Aerospace Technologies - Chinese National Space Administration ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; Minor Planet Foundation of China ; Minor Planet Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/101927]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Hsu, Weibiao
作者单位1.Chinese Acad Geol Sci, Beijing SHRIMP Ctr, Inst Geol, Beijing 102206, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Purple Mt Observ, CAS Ctr Excellence Comparat Planetol, Nanjing 210034, Peoples R China
4.Sun Yat Sen Univ, Sch Atmospher Sci, Planetary Environm & Astrobiol Res Lab, Zhuhai 519082, Peoples R China
推荐引用方式
GB/T 7714		 Wu, Yunhua,Hsu, Weibiao,Li, Qiu-Li,et al. Heterogeneous martian mantle: Evidence from petrology, mineral chemistry, and in situ U-Pb chronology of the basaltic shergottite Northwest Africa 8653[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2021,309:352-365.
APA Wu, Yunhua,Hsu, Weibiao,Li, Qiu-Li,Che, Xiaochao,&Liao, Shiyong.(2021).Heterogeneous martian mantle: Evidence from petrology, mineral chemistry, and in situ U-Pb chronology of the basaltic shergottite Northwest Africa 8653.GEOCHIMICA ET COSMOCHIMICA ACTA,309,352-365.
MLA Wu, Yunhua,et al."Heterogeneous martian mantle: Evidence from petrology, mineral chemistry, and in situ U-Pb chronology of the basaltic shergottite Northwest Africa 8653".GEOCHIMICA ET COSMOCHIMICA ACTA 309(2021):352-365.

入库方式： OAI收割

来源：地质与地球物理研究所

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