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  2. 地质与地球物理研究所
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  4. 岩石圈演化国家重点实验室
Shidian meteorite, a new fall analog of near-Earth asteroid (101955) Bennu

文献类型：期刊论文

作者Fan, Yan1,2,10; Li, Shijie9,10; Liu, Shen1,2; Yin, Qingzhu8; Song, Guangming7; Xu, Rui4; Zhang, Jiang6; Zhang, Pengfei3; Liu, Chengyu4; Wang, Rong4
刊名METEORITICS & PLANETARY SCIENCE
出版日期2022-12-01
卷号57期号:12页码:2192-2215
ISSN号1086-9379
DOI10.1111/maps.13925
英文摘要Shidian is a recent meteorite which fell in Yunnan province, China, on November 27, 2017, and has been classified as a CM2 chondrite. Petrography, mineralogy, oxygen and chromium isotopic composition, reflectance spectrum, and density studies of Shidian are reported in this study. Clasts with different aqueous alteration degree, two type 1 clasts with nontypical CM petrography, and one metamorphic clast are observed in Shidian. Mineralogically, Shidian main body consists of phyllosilicates (similar to 70 vol%), forsterite (similar to 13 vol%), fayalitic olivine, carbonates, sulfide, high-Ca pyroxene, magnetite framboids, and Fe-Ni metal. The average electron microprobe analysis (EMPA) analytical totals of phyllosilicates are 84.07 +/- 1.75 wt%, with average FeO/SiO2 of tochilinite-cronstedtite intergrowths (TCIs) in different clasts ranging from 1.18 to 3.29. The bulk geochemical composition is characterized by flat rare earth element pattern, and by depletion of highly volatile elements. The whole rock oxygen isotopic composition is -0.51 +/- 0.73 parts per thousand, 5.44 +/- 1.01 parts per thousand, and -3.38 +/- 0.20 parts per thousand for delta O-17, delta O-18, and Delta O-17, respectively, with bulk chromium isotopic composition as epsilon Cr-54 = 1.00 +/- 0.11. The grain density, bulk density, and porosity are 2.758 +/- 0.008 g cm(-3), 2.500 +/- 0.004 g cm(-3), and 9.37 +/- 0.59%, respectively. The reflectance spectrum shows "blue" (negative) continuum slope across the visible and near-infrared range, with characteristic absorption features (such as 0.765, 0.923, and 1.160 mu m for phyllosilicates). These characteristics indicate that Shidian is an unheated, brecciated CM chondrite and may be an analog of asteroid Bennu.
WOS关键词CM CARBONACEOUS CHONDRITES ; SPECTRAL REFLECTANCE PROPERTIES ; AQUEOUS ALTERATION ; OXYGEN-ISOTOPE ; THERMAL METAMORPHISM ; CHEMICAL-COMPOSITION ; MU-M ; ORIGIN ; MINERALOGY ; WATER
资助项目Strategic Priority Research Program of the Chinese Academy of Science ; Chinese Academy of Sciences "Light of West China" Program ; National Natural Science Foundation of China ; [XDB41000000] ; [KJSP2020020101] ; [42173046]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者WILEY
WOS记录号WOS:000895496700006
资助机构Strategic Priority Research Program of the Chinese Academy of Science ; Strategic Priority Research Program of the Chinese Academy of Science ; Chinese Academy of Sciences "Light of West China" Program ; Chinese Academy of Sciences "Light of West China" Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Science ; Strategic Priority Research Program of the Chinese Academy of Science ; Chinese Academy of Sciences "Light of West China" Program ; Chinese Academy of Sciences "Light of West China" Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Science ; Strategic Priority Research Program of the Chinese Academy of Science ; Chinese Academy of Sciences "Light of West China" Program ; Chinese Academy of Sciences "Light of West China" Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Science ; Strategic Priority Research Program of the Chinese Academy of Science ; Chinese Academy of Sciences "Light of West China" Program ; Chinese Academy of Sciences "Light of West China" Program ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/106962]  
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Li, Shijie; Liu, Shen
作者单位1.Northwest Univ, Dept Geol, Xian 710069, Peoples R China
2.Northwest Univ, State Key Lab Continental Dynam, Xian 710069, Peoples R China
3.Macau Univ Sci & Technol, State Key Lab Lunar & Planetary Sci, Macau 999078, Peoples R China
4.Chinese Acad Sci, Shanghai Inst Tech Phys, Key Lab Space Act Optoelect Technol, Shanghai 200083, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
6.Shandong Univ, Inst Space Sci, Sch Space Sci & Phys, Shandong Key Lab Opt Astron & Solar Terr Environm, Weihai 264209, Peoples R China
7.Beijing Inst Spacecraft Environm Engn, Beijing 100094, Peoples R China
8.Univ Calif Davis, Dept Earth & Planetary Sci, One Shields Ave, Davis, CA 95616 USA
9.Chinese Acad Sci, Ctr Excellence Comparat Planetol, Hefei 230026, Peoples R China
10.Chinese Acad Sci, Inst Geochem, Ctr Lunar & Planetary Sci, Guiyang 550081, Peoples R China
推荐引用方式
GB/T 7714		 Fan, Yan,Li, Shijie,Liu, Shen,et al. Shidian meteorite, a new fall analog of near-Earth asteroid (101955) Bennu[J]. METEORITICS & PLANETARY SCIENCE,2022,57(12):2192-2215.
APA Fan, Yan.,Li, Shijie.,Liu, Shen.,Yin, Qingzhu.,Song, Guangming.,...&Smith, Thomas.(2022).Shidian meteorite, a new fall analog of near-Earth asteroid (101955) Bennu.METEORITICS & PLANETARY SCIENCE,57(12),2192-2215.
MLA Fan, Yan,et al."Shidian meteorite, a new fall analog of near-Earth asteroid (101955) Bennu".METEORITICS & PLANETARY SCIENCE 57.12(2022):2192-2215.

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来源：地质与地球物理研究所

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