IGGCAS OpenIR  > 矿产资源研究院重点实验室
The Bayan Obo (China) giant REE accumulation conundrum elucidated by intense magmatic differentiation of carbonatite
Yang, Kuifeng1,2,3,4; Fan, Hongrui1,3,4; Pirajno, Franco2; Li, Xiaochun1,4
2019-12-01
Source PublicationGEOLOGY
ISSN0091-7613
Volume47Issue:12Pages:1198-1202
AbstractThe Bayan Obo deposit in China is endowed with the largest rare earth element (REE) resource in the world. The mechanism resulting in this REE enrichment has been the focus of many studies. Carbonatite is known globally as the most favorable carrier of REE ores. In the Bayan Obo deposit, REE ores are hosted in dolomites (including coarse-grained and fine-grained varieties), and many carbonatite dikes (ferroan, magnesian, and calcic) have been identified. All of the dolomites and carbonatite dikes appear to be broadly coeval and possess similar geochemical characteristics. The Sm-Nd isochron age of apatite (1317 +/- 140 Ma) from coarse-grained dolomite is consistent with the Th-Pb age of monazite (1321 +/- 14 Ma) from a calciocarbonatite dike. The epsilon(Nd(t)) values and initial Sr-87/Sr-86 ratios at 1.3 Ga of apatite from coarse-grained dolomite show a tight cluster between -2.5 and +1.0 and between 0.70266 and 0.70293, respectively. The delta O-18(VSMOW) values (relative to Vienna standard mean ocean water) of apatite also vary narrowly from 5.0 parts per thousand to 6.2 parts per thousand. These results are consistent with primary mantle-derived carbonatite and prove a magmatic origin for the ore-hosting dolomite. Furthermore, the rim and core texture of dolomite and calcite in the magnesian and calcic carbonatite dikes shows that carbonatite at Bayan Obo has an evolutionary sequence from ferroan through magnesian to calcic in nature. There is a clear negative correlation between the iron content and REE concentration in different stages of carbonatite. Intense magmatic differentiation of carbonatite is likely the critical factor for the giant REE accumulation.
DOI10.1130/G46674.1
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd.
WOS KeywordINNER-MONGOLIA ; NB DEPOSIT ; GENESIS ; FENITIZATION ; CONSTRAINTS ; COMPLEX ; ROCKS ; PB
Language英语
Funding ProjectNational Key R&D Program of China[2017YFC0602302] ; National Natural Science Foundation of China[41372099] ; National Natural Science Foundation of China[41930430] ; Zhongke Developing Science and Technology Co., Ltd.[2017H1973] ; Zhongke Developing Science and Technology Co., Ltd.[ZK2018H003]
Funding OrganizationNational Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd. ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Zhongke Developing Science and Technology Co., Ltd. ; Zhongke Developing Science and Technology Co., Ltd.
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000504335600026
PublisherGEOLOGICAL SOC AMER, INC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95863
Collection矿产资源研究院重点实验室
Corresponding AuthorYang, Kuifeng; Fan, Hongrui
Affiliation1.Chinese Acad Sci, Key Lab Mineral Resources, Inst Geol & Geophys, Beijing 100029, Peoples R China
2.Univ Western Australia, Ctr Explorat Targeting, 35 Stirling Highway, Crawley, WA 6009, Australia
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Yang, Kuifeng,Fan, Hongrui,Pirajno, Franco,et al. The Bayan Obo (China) giant REE accumulation conundrum elucidated by intense magmatic differentiation of carbonatite[J]. GEOLOGY,2019,47(12):1198-1202.
APA Yang, Kuifeng,Fan, Hongrui,Pirajno, Franco,&Li, Xiaochun.(2019).The Bayan Obo (China) giant REE accumulation conundrum elucidated by intense magmatic differentiation of carbonatite.GEOLOGY,47(12),1198-1202.
MLA Yang, Kuifeng,et al."The Bayan Obo (China) giant REE accumulation conundrum elucidated by intense magmatic differentiation of carbonatite".GEOLOGY 47.12(2019):1198-1202.
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