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Extreme enrichment of rare earth elements in hard clay rocks and its potential as a resource

文献类型：期刊论文

作者Zhang, Zhengwei1; Zheng, Guodong2; Takahashi, Yoshio2,3; Wu, Chengquan1,4; Zheng, Chaofei1,4; Yao, Junhua1,4; Xiao, Chaoyi1,4
刊名ORE GEOLOGY REVIEWS
出版日期2016
卷号72页码:191-212
关键词Kaolinitic clay rocks Carbonaceous shale Rare earth element Western Guizhou
DOI10.1016/j.oregeorev.2015.07.018
文献子类Article
英文摘要The Xuanwei Formation is widely distributed in western Guizhou Province, NW China, the lower section of which is primarily composed of gray-white kaolinitic claystone interbedded with thin layers of grayish black carbonaceous mudstone that are extremely enriched with rare earth elements. In order to determine the distribution patterns and existing status of ore-forming elements in these rocks, careful field investigations were performed along a selected geological profile and rock samples were collected and studied in terms of mineralogical and geochemical characteristics. The results show that: 1) REEs are primarily enriched in the grayish white kaolinitic clay sediments and grayish black carbonaceous mudstone. Mineralogical analyses revealed kaolinite as the major mineral in rocks along with smaller amounts of smectite, illite, boehmite, hornblende, pyrophyllite, calcite, dolomite and/or iron-bearing minerals, as well as a certain proportion of feldspar, quartz crystal debris and noncrystal debris. 2) Sigma REE contents are 89.0 to 9965 ppm with an average of 1312 ppm. The thickness of the host rock with Sigma REE higher than 1300 ppm is more than 4 m, which is referred to as the "REE-enriched layer". 3) The REE contents of bulk rocks exhibit a negative correlation with kaolinite, positive correlations with boehmite, hornblende and iron-bearing minerals, and weak positive correlations with smectite, illite and pyrophyllite, indicating that the REE might exist in an ion adsorption state in the space between the layers of clay minerals. 4) Compared with the underlying Emeishan Basalts, the REE patterns of samples are quite similar but are enriched in both LREE and HREE. The degree of enrichment of HREE is relatively high. Based on these results, a model is suggested where the REE-enriched layers originated from the Emeishan Basalts and were controlled by the transportation and deposition of detritus from a paleo-weathering crust. The hard clay rocks have a significant resource potential, as the contents of REE, Ga, Nb and Zr are considerably higher than those in the weathering crust type of REE deposit. (C) 2015 Elsevier B.V. All rights reserved.
WOS关键词EMEISHAN FLOOD BASALTS ; TRACE-ELEMENTS ; WEATHERING CRUST ; WESTERN GUIZHOU ; SOUTH CHINA ; SW CHINA ; REE ; DEPOSITS ; FRACTIONATION ; BEHAVIOR
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
语种英语
WOS记录号WOS:000366345100012
资助机构Natural Science Foundation of China(41173064 ; Natural Science Foundation of China(41173064 ; 12th Five-Year Plan project of State Key Laboratory of Ore-deposit Geochemistry, Chinese Academy of Sciences(SKLODG-ZY125-08) ; 12th Five-Year Plan project of State Key Laboratory of Ore-deposit Geochemistry, Chinese Academy of Sciences(SKLODG-ZY125-08) ; Chinese Academy of Sciences Visiting Professorship for Senior International Scientists(2012T1Z0035) ; Chinese Academy of Sciences Visiting Professorship for Senior International Scientists(2012T1Z0035) ; 41273112 ; 41273112 ; 41020124002) ; 41020124002) ; Natural Science Foundation of China(41173064 ; Natural Science Foundation of China(41173064 ; 12th Five-Year Plan project of State Key Laboratory of Ore-deposit Geochemistry, Chinese Academy of Sciences(SKLODG-ZY125-08) ; 12th Five-Year Plan project of State Key Laboratory of Ore-deposit Geochemistry, Chinese Academy of Sciences(SKLODG-ZY125-08) ; Chinese Academy of Sciences Visiting Professorship for Senior International Scientists(2012T1Z0035) ; Chinese Academy of Sciences Visiting Professorship for Senior International Scientists(2012T1Z0035) ; 41273112 ; 41273112 ; 41020124002) ; 41020124002)
源URL[http://ir.iggcas.ac.cn/handle/132A11/62140]  
专题地质与地球物理研究所_兰州油气中心
作者单位1.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550002, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Gansu Prov Key Lab Petr Resources Res, Key Lab Petr Resources, Lanzhou 730000, Peoples R China
3.Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, Bunkyo Ku, Tokyo 1130033, Japan
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Zhengwei,Zheng, Guodong,Takahashi, Yoshio,et al. Extreme enrichment of rare earth elements in hard clay rocks and its potential as a resource[J]. ORE GEOLOGY REVIEWS,2016,72:191-212.
APA Zhang, Zhengwei.,Zheng, Guodong.,Takahashi, Yoshio.,Wu, Chengquan.,Zheng, Chaofei.,...&Xiao, Chaoyi.(2016).Extreme enrichment of rare earth elements in hard clay rocks and its potential as a resource.ORE GEOLOGY REVIEWS,72,191-212.
MLA Zhang, Zhengwei,et al."Extreme enrichment of rare earth elements in hard clay rocks and its potential as a resource".ORE GEOLOGY REVIEWS 72(2016):191-212.

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来源：地质与地球物理研究所

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