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The formation of the giant Bayan Obo REE-Nb-Fe deposit, North China, Mesoproterozoic carbonatite and overprinted Paleozoic dolomitization
Liu, Yu-Long1; Ling, Ming-Xing2,7; Williams, Ian S.3; Yang, Xiao-Yong4; Wang, Christina Yan1; Sun, Weidong5,6,7
2018
Source PublicationORE GEOLOGY REVIEWS
ISSN0169-1368
Volume92Pages:73-83
Corresponding AuthorLiu, Yu-Long(ylliu@gig.ac.cn) ; Ling, Ming-Xing(mxling@gig.ac.cn)
AbstractThe Bayan Obo ore deposit in Inner Mongolia, North China, the largest-known rare earth element (REE) deposit in the world, is closely associated with carbonatite dykes. Scarce zircon grains, with a wide range of ages and diverse origins, have been extracted from the Wu dyke, a REE-enriched calcitic carbonatite dyke 2 km from the East Ore Body of the Bayan Obo deposit. Three zircon populations were identified based on ages and trace element compositions: 1) Captured zircons with Paleoproterozoic and Archean ages. These zircons have REE patterns and moderate Th/U ratios similar to zircon with silicate inclusions from basement igneous rocks, which have been recognized as contaminants from wall rocks. 2) Carbonatite magmatic zircons with Mesoproterozoic ages. These zircons have high to extremely high Th/U ratios (13-1600), a characteristic signature of the Bayan Obo deposit. Two zircon grains yielded concordant Pb-206/U-238 ages (1.27 +/- 0.11 Ga similar to 1.42 +/- 0.18 Ga) and Pb-208/Th-232 age (1.26 +/- 0.20 Ga) with calcite inclusions, indicating that the Wu dyke was emplaced at ca. 1.34 Ga, which coincides with a worldwide generation of Mesoproterozoic kimberlites, lamprophyres, carbonatites, and anorogenic magmatism. 3) Hydrothermal zircons with Caledonian and Triassic ages. The Caledonian zircon has Pb-206/U-238 age of 381 +/- 4 Ma and Pb-208/Th-232 age of 367 +/- 14 Ma with dolomite inclusion. These evidences are consistent with multiple stages of mineralization, Mesoproterozoic calcite carbonatite magmatism interacted by protracted fluxing of subduction-released Caledonian fluids during the closure of the Palaeo-Asian Ocean, coupled with interaction with the mantle wedge and metasomatism of overlying sedimentary carbonate.
KeywordBayan Obo deposit Carbonatite Rare earth element (REE) mineralization Mesoproterozoic Zircon U-Th-Pb ages
DOI10.1016/j.oregeorev.2017.11.011
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2017YFC0602302] ; National Key R&D Program of China[2017YFC0602301] ; Natural Science Foundation of China[41273055] ; Natural Science Foundation of China[41421062] ; Guangdong Natural Science Funds[2014A030306032] ; Guangdong Natural Science Funds[2015TQ01Z611] ; Youth Innovation Promotion Association CAS[2016315]
WOS Research AreaGeology ; Mineralogy ; Mining & Mineral Processing
WOS SubjectGeology ; Mineralogy ; Mining & Mineral Processing
WOS IDWOS:000424185700006
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/158030
Collection深海极端环境与生命过程研究中心
Corresponding AuthorLiu, Yu-Long; Ling, Ming-Xing
Affiliation1.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangzhou 510640, Guangdong, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China
3.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 0200, Australia
4.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Anhui, Peoples R China
5.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Peoples R China
6.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China
7.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Liu, Yu-Long,Ling, Ming-Xing,Williams, Ian S.,et al. The formation of the giant Bayan Obo REE-Nb-Fe deposit, North China, Mesoproterozoic carbonatite and overprinted Paleozoic dolomitization[J]. ORE GEOLOGY REVIEWS,2018,92:73-83.
APA Liu, Yu-Long,Ling, Ming-Xing,Williams, Ian S.,Yang, Xiao-Yong,Wang, Christina Yan,&Sun, Weidong.(2018).The formation of the giant Bayan Obo REE-Nb-Fe deposit, North China, Mesoproterozoic carbonatite and overprinted Paleozoic dolomitization.ORE GEOLOGY REVIEWS,92,73-83.
MLA Liu, Yu-Long,et al."The formation of the giant Bayan Obo REE-Nb-Fe deposit, North China, Mesoproterozoic carbonatite and overprinted Paleozoic dolomitization".ORE GEOLOGY REVIEWS 92(2018):73-83.
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