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Fenitization in the giant Bayan Obo REE-Nb-Fe deposit: Implication for REE mineralization

文献类型：期刊论文

作者Liu, Shang1,2; Fan, Hong-Rui1,2,3; Yang, Kui-Feng1,2,3; Hu, Fang-Fang1,2,3; Rusk, Brian4; Liu, Xuan1,4; Li, Xiao-Chun5; Yang, Zhan-Feng6; Wang, Qi-Wei6; Wang, Kai-Yi1
刊名ORE GEOLOGY REVIEWS
出版日期2018-03-01
卷号94页码:290-309
关键词Fenitization Alkali Metasomatism Ree-nb-fe Deposit Bayan Obo
ISSN号0169-1368
DOI10.1016/j.oregeorev.2018.02.006
文献子类Article
英文摘要Fenitization, a unique type of alkali metasomatism related to carbonatite or alkaline igneous rocks, is widely distributed around the Mesoproterozoic carbonatite dykes in the Bayan Obo giant REE-Nb-Fe deposit. Meanwhile, represented by alkali silicates (sodic amphibole or aegirine) enriched REE-(Fe) ores, there is extensive alkali alteration in ores at Bayan Obo, whose similarity to fenitization has been proposed. Fenitization associated with carbonatite is an appropriate indicator of REE mineralizing process. Alkali silicates (sodic amphibole, aegirine and phlogopite) from the East and Main open pits, and fenite around the Wu dyke at Bayan Obo were collected for EMPA and laser ablation ICPMS analyses. Aegirine and phlogopite from the open pits and fenite around the Wu dyke contain similar major components. Sodic amphiboles from those two localities contain comparable trace element composition but with different Cao, MgO and F contents. Alkali silicates from fenites around the Wu dyke show systematic enrichment of Zr, Hf and Ti over alkali silicates from the open pits. Considering different wallrocks and other factors influencing the composition, combined with previous results of geochronology, mineralogy and fluid inclusion, the alkali alteration in the open pits is essentially fenitization in ore-hosting dolomite. A two-stage fenitization process is supported by the zonal texture of sodic amphiboles from Wu carbonatite dyke. The early stage fenitization was Mg, Na, K, F rich and Fe, La, Ce depleted, distributed in alkali silicates from the banded REE-Fe ores and in the core of sodic amphiboles from the Wu dyke. The late stage was Fe, LREE rich and Mg, Na, K, F depleted, distributed in the massive REE-(Fe) ores and the rim of sodic amphiboles from the Wu dyke. The initial alkali fluids derived from carbonatite commonly exhibits LREE-rich patterns. Therefore, the LREE-depletion and low La/Nd ratio of the early stage silicates indicates intense LREE-bearing mineral precipitation and the REE mineralization gradually weakened in the late stage when alkali fluids kept the initial REE patterns unchanged.
WOS关键词NORTH CHINA CRATON ; RARE-EARTH MINERALIZATION ; RICH CARBONATITE DYKE ; INNER-MONGOLIA ; ORE-DEPOSIT ; ISOTOPIC CONSTRAINTS ; GEOCHEMICAL CHARACTERISTICS ; HYDROTHERMAL MOBILIZATION ; FLUID INCLUSIONS ; DOLOMITE MARBLE
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
语种英语
WOS记录号WOS:000428497700019
出版者ELSEVIER SCIENCE BV
资助机构National Key R&D Program of China(2017YFC0602302) ; National Key R&D Program of China(2017YFC0602302) ; National Key R&D Program of China(2017YFC0602302) ; National Key R&D Program of China(2017YFC0602302) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Society of Economic Geology(2017) ; Society of Economic Geology(2017) ; Society of Economic Geology(2017) ; Society of Economic Geology(2017) ; National Key R&D Program of China(2017YFC0602302) ; National Key R&D Program of China(2017YFC0602302) ; National Key R&D Program of China(2017YFC0602302) ; National Key R&D Program of China(2017YFC0602302) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Society of Economic Geology(2017) ; Society of Economic Geology(2017) ; Society of Economic Geology(2017) ; Society of Economic Geology(2017) ; National Key R&D Program of China(2017YFC0602302) ; National Key R&D Program of China(2017YFC0602302) ; National Key R&D Program of China(2017YFC0602302) ; National Key R&D Program of China(2017YFC0602302) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Society of Economic Geology(2017) ; Society of Economic Geology(2017) ; Society of Economic Geology(2017) ; Society of Economic Geology(2017) ; National Key R&D Program of China(2017YFC0602302) ; National Key R&D Program of China(2017YFC0602302) ; National Key R&D Program of China(2017YFC0602302) ; National Key R&D Program of China(2017YFC0602302) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Zhongke Developing Science and Technology Co., Ltd(2017H1973) ; Society of Economic Geology(2017) ; Society of Economic Geology(2017) ; Society of Economic Geology(2017) ; Society of Economic Geology(2017)
源URL[http://ir.iggcas.ac.cn/handle/132A11/88337]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Fan, Hong-Rui
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
4.Western Washington Univ, Dept Geol, Bellingham, WA 98225 USA
5.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China
6.Baotou Res Inst Rare Earth, Baotou 014030, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Shang,Fan, Hong-Rui,Yang, Kui-Feng,et al. Fenitization in the giant Bayan Obo REE-Nb-Fe deposit: Implication for REE mineralization[J]. ORE GEOLOGY REVIEWS,2018,94:290-309.
APA Liu, Shang.,Fan, Hong-Rui.,Yang, Kui-Feng.,Hu, Fang-Fang.,Rusk, Brian.,...&Wang, Kai-Yi.(2018).Fenitization in the giant Bayan Obo REE-Nb-Fe deposit: Implication for REE mineralization.ORE GEOLOGY REVIEWS,94,290-309.
MLA Liu, Shang,et al."Fenitization in the giant Bayan Obo REE-Nb-Fe deposit: Implication for REE mineralization".ORE GEOLOGY REVIEWS 94(2018):290-309.

入库方式： OAI收割

来源：地质与地球物理研究所

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