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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
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| 2018 | |
| Source Publication | ORE GEOLOGY REVIEWS
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| ISSN | 0169-1368 |
| Volume | 92Pages:73-83 |
| Corresponding Author | Liu, Yu-Long(ylliu@gig.ac.cn) ; Ling, Ming-Xing(mxling@gig.ac.cn) |
| Abstract | The 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. |
| Keyword | Bayan Obo deposit Carbonatite Rare earth element (REE) mineralization Mesoproterozoic Zircon U-Th-Pb ages |
| DOI | 10.1016/j.oregeorev.2017.11.011 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National 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 Area | Geology ; Mineralogy ; Mining & Mineral Processing |
| WOS Subject | Geology ; Mineralogy ; Mining & Mineral Processing |
| WOS ID | WOS:000424185700006 |
| Publisher | ELSEVIER SCIENCE BV |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.qdio.ac.cn/handle/337002/158030 |
| Collection | 深海极端环境与生命过程研究中心 |
| Corresponding Author | Liu, Yu-Long; Ling, Ming-Xing |
| Affiliation | 1.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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