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Distributions of selenium and related elements in high pyrite and Se-enriched rocks from Ziyang, Central China

文献类型：期刊论文

作者Tian, Huan6; Xie, Shuyun1; Carranza, Emmanuel John M.3,4; Bao, Zhengyu2,6; Zhang, Hai7; Wu, Shitou5; Wei, Changhua6; Ma, Zhenzhen6
刊名JOURNAL OF GEOCHEMICAL EXPLORATION
出版日期2020-05-01
卷号212页码:16
ISSN号0375-6742
关键词Se-enriched pyrite Element zoning Hydrothermal fluid Lower Cambrian
DOI10.1016/j.gexplo.2020.106506
英文摘要Pyrite-bearing volcanic tuff and carbonaceous slates of the Lower Cambrian Lujiaping Formation have been considered the source of selenium (Se) in high-Se soils in the area of the Naore Village of the Ziyang County, China, where acute Se toxicity occurred in the 1980s. For geochemical exploration, the accumulation and distribution of Se and trace elements within the pyrite grains are of great indicative significance for understanding the possible origin and forming mechanism of the Se enrichment. In this work, 7 rock samples and 89 pyrite grains were collected and analysed to investigate the element micro-distribution within the pyrite grains using EPMA and LA-ICP-MS. The whole-rock analysis shows that the pyrite-bearing Lower Cambrian rocks in Ziyang are commonly enriched in Se, As, Mo, Cd, Cr, Ni, Sb, Cu and Ba. In situ microanalysis indicates that Se (30-1880 mu g/g) and As (160-2960 mu g/g) concentrations within the pyrite grains are 1-2 orders of magnitude higher than those in the host rocks (Se: 0.56-73.1 mu g/g, As: 2.56-195 mu g/g) and that the Se contents are negatively correlated with pyrite mineral sizes. Grain-scale element mappings of fresh Se-enriched pyrites reveal two types of Se and As distribution patterns (type-I: high-Se 120-1870 mu g/g and low-As < 150-1580 mu g/g cores, type-II: low-Se 60-680 mu g/g and low-As < 150-1310 mu g/g cores) with alternating Se or As contents during the growth of zoned pyrite. The texture of pyrite element zoning reflects multi-stage hydrothermal pulses with changing trace element concentrations. Type-II pyrite formed later than type-I pyrite. Genetic analysis confirms that Se-enriched strata were strongly affected by hydrothermal submarine deposition and that Se in pyrite was mainly derived from hydrothermal fluids. Secondary hydrothermal erosion led to the formation of high-Se "fractures" (Se content 19.3 wt%). In summary, utilizing pyrite as an indicator for the Lower Cambrian Lujiaping Formation Se-bearing strata extends our understanding of selenium geochemical processes and highlights the mechanistic aspects of Se.
WOS关键词CAMBRIAN BLACK SHALES ; SOUTH CHINA ; WITWATERSRAND BASIN ; SEDIMENTARY-ROCKS ; NATIVE SELENIUM ; SELENOSIS AREA ; HUBEI PROVINCE ; WESTERN HUBEI ; DABA REGION ; YUTANGBA
资助项目National Key Research and Development Program of China[2016YFC0600501] ; Natural Science Foundation of Hubei Province[2019CFB235] ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan)[G1323519320] ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan)[CUG170104] ; China Geological Survey[12120113087100] ; China Geological Survey[DD20160095-13] ; Science and Technology Agency of Shaanxi Province[2016FP3-11] ; Science and Technology Agency of Shaanxi Province[2017TSCXL-NY-02-01] ; China Geological Sciences Institute of Geophysical Geochemical Exploration (IGGE)[WHS201302]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者ELSEVIER
WOS记录号WOS:000523564700004
资助机构National Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of Hubei Province ; Natural Science Foundation of Hubei Province ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; China Geological Survey ; China Geological Survey ; Science and Technology Agency of Shaanxi Province ; Science and Technology Agency of Shaanxi Province ; China Geological Sciences Institute of Geophysical Geochemical Exploration (IGGE) ; China Geological Sciences Institute of Geophysical Geochemical Exploration (IGGE) ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of Hubei Province ; Natural Science Foundation of Hubei Province ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; China Geological Survey ; China Geological Survey ; Science and Technology Agency of Shaanxi Province ; Science and Technology Agency of Shaanxi Province ; China Geological Sciences Institute of Geophysical Geochemical Exploration (IGGE) ; China Geological Sciences Institute of Geophysical Geochemical Exploration (IGGE) ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of Hubei Province ; Natural Science Foundation of Hubei Province ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; China Geological Survey ; China Geological Survey ; Science and Technology Agency of Shaanxi Province ; Science and Technology Agency of Shaanxi Province ; China Geological Sciences Institute of Geophysical Geochemical Exploration (IGGE) ; China Geological Sciences Institute of Geophysical Geochemical Exploration (IGGE) ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; Natural Science Foundation of Hubei Province ; Natural Science Foundation of Hubei Province ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) ; China Geological Survey ; China Geological Survey ; Science and Technology Agency of Shaanxi Province ; Science and Technology Agency of Shaanxi Province ; China Geological Sciences Institute of Geophysical Geochemical Exploration (IGGE) ; China Geological Sciences Institute of Geophysical Geochemical Exploration (IGGE)
源URL[http://ir.iggcas.ac.cn/handle/132A11/95517]  
专题地质与地球物理研究所_科技支撑系统
通讯作者Xie, Shuyun; Bao, Zhengyu
作者单位1.China Univ Geosci, Fac Earth Sci, State Key Lab Geol Proc & Mineral Resources GPMR, Wuhan 430074, Peoples R China
2.China Univ Geosci, Zhejiang Inst, Hangzhou 311305, Zhejiang, Peoples R China
3.James Cook Univ, Econ Geol Res Ctr EGRU, Townsville, Qld, Australia
4.Univ KwaZulu Natal, Sch Agr Earth & Environm Sci, Geol Sci, ZA-3629 Westville, South Africa
5.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
6.China Univ Geosci, Fac Chem & Mat Sci, State Key Lab Geol Proc & Mineral Resources GPMR, Wuhan 430074, Peoples R China
7.Guizhou Prov Bur Geol & Mineral Resources, Geol 113 Brigade, Liupanshu 553001, Guizhou, Peoples R China
推荐引用方式
GB/T 7714		 Tian, Huan,Xie, Shuyun,Carranza, Emmanuel John M.,et al. Distributions of selenium and related elements in high pyrite and Se-enriched rocks from Ziyang, Central China[J]. JOURNAL OF GEOCHEMICAL EXPLORATION,2020,212:16.
APA Tian, Huan.,Xie, Shuyun.,Carranza, Emmanuel John M..,Bao, Zhengyu.,Zhang, Hai.,...&Ma, Zhenzhen.(2020).Distributions of selenium and related elements in high pyrite and Se-enriched rocks from Ziyang, Central China.JOURNAL OF GEOCHEMICAL EXPLORATION,212,16.
MLA Tian, Huan,et al."Distributions of selenium and related elements in high pyrite and Se-enriched rocks from Ziyang, Central China".JOURNAL OF GEOCHEMICAL EXPLORATION 212(2020):16.

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来源：地质与地球物理研究所

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