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First identification of baddeleyite related/linked to contact metamorphism from carbonatites in the world's largest REE deposit, Bayan Obo in North China Craton

文献类型：期刊论文

作者Zhang, Shuan-Hong1,2; Zhao, Yue1,2; Li, Qiu-Li3; Hu, Zhao-Chu4; Chen, Zhen-Yu5
刊名LITHOS
出版日期2017-07-01
卷号284页码:654-665
关键词Baddeleyite U-Th-Pb geochronology Contact metamorphism Carbonatite Bayan Obo deposit North China Craton (NCC)
ISSN号0024-4937
DOI10.1016/j.lithos.2017.05.015
文献子类Article
英文摘要Baddeleyite has been recognized as a key mineral to determine the crystallization age of silica-undersaturated igneous rocks. Here we report a new occurrence of baddeleyite identified from REE-Nb-Th-rich carbonatite in the world's largest REE deposit, Bayan Obo, in the North China Craton (China). U-Th-Pb dating of three baddeleyite samples yields crystallization ages of 310-270 Ma with the best estimated crystallization age of ca. 280 Ma. These ages are significantly younger than the ca. 1300 Ma Bayan Obo carbonatites, but broadly coeval to nearby Permian granitoids intruding into the carbonatites. Hence, the Bayan Obo baddeleyite did not crystallize from the carbonatitic magma that led to the formation of the Bayan Obo carbonatites and related REE-Nb-Th deposit. Instead, it crystallized from hydrothermal fluids and/or a reaction involving zircon and,dolomite during contact metamorphism related to the Permian granitoid emplacement. This is in agreement with the results of electron microprobe analysis that show humite inclusions in baddeleyite, since humite is a typical magnesian skarn mineral and occurs in close proximity to the intrusive contacts between carbonatites and granitoids. Our results show that baddeleyite can be used for dating hydrothermal and contact metamorphic processes. (C) 2017 Elsevier B.V. All rights reserved.
WOS关键词MBUJI-MAYI KIMBERLITE ; NB ORE-DEPOSIT ; U-TH-PB ; INNER-MONGOLIA ; TRACE-ELEMENT ; HF ISOTOPES ; HYDROTHERMAL BADDELEYITE ; BALLACHULISH AUREOLE ; LU-HF ; ZIRCON
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000405252300042
出版者ELSEVIER SCIENCE BV
资助机构National Natural Science Foundation of China(41372230 ; CAGS Fundamental Research Fund(YYWF201718) ; Chinese Geological Survey(1212011121070) ; 41572204) ; National Natural Science Foundation of China(41372230 ; CAGS Fundamental Research Fund(YYWF201718) ; Chinese Geological Survey(1212011121070) ; 41572204) ; National Natural Science Foundation of China(41372230 ; CAGS Fundamental Research Fund(YYWF201718) ; Chinese Geological Survey(1212011121070) ; 41572204) ; National Natural Science Foundation of China(41372230 ; CAGS Fundamental Research Fund(YYWF201718) ; Chinese Geological Survey(1212011121070) ; 41572204)
源URL[http://ir.iggcas.ac.cn/handle/132A11/42777]  
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Zhang, Shuan-Hong
作者单位1.Chinese Acad Geol Sci, Inst Geomech, Beijing 100081, Peoples R China
2.Minist Land & Resources, Key Lab Paleomagnetism & Tecton Reconstruct, Beijing 100081, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
5.Chinese Acad Geol Sci, Inst Mineral Resources, MLR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Shuan-Hong,Zhao, Yue,Li, Qiu-Li,et al. First identification of baddeleyite related/linked to contact metamorphism from carbonatites in the world's largest REE deposit, Bayan Obo in North China Craton[J]. LITHOS,2017,284:654-665.
APA Zhang, Shuan-Hong,Zhao, Yue,Li, Qiu-Li,Hu, Zhao-Chu,&Chen, Zhen-Yu.(2017).First identification of baddeleyite related/linked to contact metamorphism from carbonatites in the world's largest REE deposit, Bayan Obo in North China Craton.LITHOS,284,654-665.
MLA Zhang, Shuan-Hong,et al."First identification of baddeleyite related/linked to contact metamorphism from carbonatites in the world's largest REE deposit, Bayan Obo in North China Craton".LITHOS 284(2017):654-665.

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来源：地质与地球物理研究所

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