IGGCAS OpenIR  > 地球与行星物理院重点实验室
Discovery of nanophase iron particles and high pressure clinoenstatite in a heavily shocked ordinary chondrite: Implications for the decomposition of pyroxene
Guo, Zhuang1,2,3,4; Li, Yang1,5; Liu, Shen2,3; Xu, Huifang6; Xie, Zhidong9; Li, Shijie1,5; Li, Xiongyao1,5; Lin, Yangting7; Coulson, Ian M.8; Zhang, Mingming1,5
2020-03-01
Source PublicationGEOCHIMICA ET COSMOCHIMICA ACTA
ISSN0016-7037
Volume272Pages:276-286
AbstractAlthough pure metallic iron (i.e. that with an Fe content of greater than 99%) commonly occurs in achondrites, and within the returned soil from asteroids or the Lunar surface, it is rarely found in ordinary chondrites meteorites. Abundant nanophase iron particles (np-Fe) were identified in pyroxene glass, within the shock melt vein of Grove Mountains (GRV) 022115, which is an ordinary (L6) chondrite, with a shock stage determined as S5. The association of np-Fe-0, highly defective high pressure clinoenstatite (HP-CEn), silica glass, as well as vesicles, embedded in a pyroxene glass selvage within the shock melt vein in this meteorite suggests that these phases formed as the result of decomposition of the host pyroxene grain, a process induced by the shock event that affected GRV 022115. The reaction to account for this mineral breakdown can be written as: FeSiO3 -> Fe + SiO2 + 1/2O(2) up arrow (MgSiO3 remain in the HP-CEn). The pressure and temperature condition attending this reaction are estimated at 20-23 GPa and over 1800 degrees C, as indicated by the surrounded high-pressure mineral assemblage: ringwoodite, majorite, and magnesiowustite. This study provides evidence to the formation of np-Fe-0 derived from pyroxene, and HP-CEn quenched metastably in such shocked vein could preserve the metastable phase transitions history record. (C) 2019 Elsevier Ltd. All rights reserved.
KeywordOrdinary chondrite Pyroxene High-pressure clinoenstatite Pure metallic iron Shock metamorphism
DOI10.1016/j.gca.2019.10.036
Funding OrganizationKey Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordINDUCED MELT VEIN ; HIGH-TEMPERATURE ; X-RAY ; CONSTRAINTS ; MINERALS ; OLIVINE ; METAL ; PROTOENSTATITE ; NANOPARTICLES ; METAMORPHISM
Language英语
Funding ProjectKey Research Program of the Chinese Academy of Sciences[XDPB11] ; Key Research Program of the Chinese Academy of Sciences[XDA 15020300] ; National Natural Science Foundation of China[41673071] ; National Natural Science Foundation of China[41931077] ; National Natural Science Foundation of China[41272057]
Funding OrganizationKey Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Research Program of the Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000512992000016
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95638
Collection地球与行星物理院重点实验室
Corresponding AuthorLi, Yang; Liu, Shen
Affiliation1.Chinese Acad Sci, Ctr Lunar & Planetary Sci, Inst Geochem, Guiyang 550081, Peoples R China
2.Northwest Univ, State Key Lab Continental Dynam, Xian 710069, Peoples R China
3.Northwest Univ, Dept Geol, Xian 710069, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Ctr Excellence Comparat Planetol, Beijing, Peoples R China
6.Univ Wisconsin, Dept Geosci, Madison, WI 53706 USA
7.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
8.Univ Regina, Dept Geol, Solid Earth Studies Lab, Regina, SK S4S 0A2, Canada
9.Nanjing Univ, Sch Earth Sci & Engn, Nanjing 210023, Peoples R China
Recommended Citation
GB/T 7714
Guo, Zhuang,Li, Yang,Liu, Shen,et al. Discovery of nanophase iron particles and high pressure clinoenstatite in a heavily shocked ordinary chondrite: Implications for the decomposition of pyroxene[J]. GEOCHIMICA ET COSMOCHIMICA ACTA,2020,272:276-286.
APA Guo, Zhuang.,Li, Yang.,Liu, Shen.,Xu, Huifang.,Xie, Zhidong.,...&Zhang, Mingming.(2020).Discovery of nanophase iron particles and high pressure clinoenstatite in a heavily shocked ordinary chondrite: Implications for the decomposition of pyroxene.GEOCHIMICA ET COSMOCHIMICA ACTA,272,276-286.
MLA Guo, Zhuang,et al."Discovery of nanophase iron particles and high pressure clinoenstatite in a heavily shocked ordinary chondrite: Implications for the decomposition of pyroxene".GEOCHIMICA ET COSMOCHIMICA ACTA 272(2020):276-286.
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