| 湘西花垣铅锌矿田闪锌矿痕量元素地球化学特征 |
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| 引用本文： | 隗含涛,邵拥军,叶周,周皓迪.湘西花垣铅锌矿田闪锌矿痕量元素地球化学特征[J].成都理工大学学报(自然科学版),2021,48(2):142-153. |
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| 作者姓名： | 隗含涛 邵拥军 叶周 周皓迪 |
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| 作者单位： | 中国地质科学院 矿产资源研究所,自然资源部成矿作用与资源评价重点实验室,北京 100037;中南大学 有色金属成矿预测与地质环境监测教育部重点实验室,长沙 410083;中南大学 有色金属成矿预测与地质环境监测教育部重点实验室,长沙 410083;湖南省地质博物馆,长沙 410004;湖南省国土资源规划院,长沙 410007 |
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| 基金项目： | 中南大学"创新驱动计划"项目;中国地质调查局整装勘查项目;中南大学博士生自主探索创新项目 |
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| 摘 要： | 以湘西花垣铅锌矿田内不同矿床不同阶段的闪锌矿为研究对象,进行LA-ICP-MS原位点测试分析,旨在揭示闪锌矿中不同痕量元素的特征,为矿床成因提供新的约束。矿田内闪锌矿所含痕量元素种类较少且含量偏低,较富集Cd、Ga、Ge等元素,Fe、Mn、Cu、Pb、Ag、Co、Tl、Se、In等元素含量低,闪锌矿的Ga/In、Ge/In比值(大于5)、Zn/Cd比值(102)及In-Ge关系图等,均指示其形成于中低温环境。李梅、芭茅寨、土地坪及清水塘矿床主成矿阶段闪锌矿Ga/Ge原子比值估算的成矿温度主要集中在185~247℃、175~235℃、150~198℃和164~176℃,进一步证明矿床形成于中低温条件;且远离花垣-张家界断裂温度呈下降趋势,指示花垣-张家界断裂可能是导矿断裂。总体而言,闪锌矿痕量元素特征可与典型MVT型铅锌矿床类比,痕量元素特征图解中均与MVT型矿床高度吻合。结合矿床地质和闪锌矿痕量元素特征,认为花垣矿田铅锌矿属于MVT型铅锌矿床。
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| 关 键 词： | 闪锌矿 痕量元素 LA-ICP-MS MVT型矿床 花垣铅锌矿田 |
Geochemical characteristics of trace elements of sphalerite from Huayuan Pb-Zn ore field,western Hunan,China |
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| WEI Hantao,SHAO Yongjun,YE Zhou,ZHOU Haodi.Geochemical characteristics of trace elements of sphalerite from Huayuan Pb-Zn ore field,western Hunan,China[J].Journal of Chengdu University of Technology: Sci & Technol Ed,2021,48(2):142-153. |
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| Authors: | WEI Hantao SHAO Yongjun YE Zhou ZHOU Haodi |
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| Institution: | (MNR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring of China Ministry of Education, Central South University, Changsha 410083, China;Geological Museum of Hunan, Changsha 410004, China;City Land Resources Planning Institute of Hunan, Changsha 410007, China) |
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| Abstract: | LA-ICP-MS in-situ test analysis on the sphalerite formed in different stages at different deposits in Huayuan lead-zinc ore field,western Hunan is carried out to reveal the characteristics of different trace elements in sphalerite and provide new constraints for the genesis of the deposit.The trace elements of sphalerite in the ore field are relatively small and low,and the elements such as Cd,Ga and Ge are enriched,while the elements such as Fe,Mn,Cu,Pb,Ag,Co,Tl,Se and In are low.The Ga/In,Ge/In ratio(greater than 5),Zn/Cd ratio(102)and In-Ge diagram of sphalerite all indicate that the sphalerite in the area is formed in low temperature environment.The estimated Ga/Ge temperature of sphalerite in the main metallogenic stage at Limei,Bamaozhai,Tudiping and Qingshuitang deposits are mainly in the range of 185~247℃,175~235℃,150~198℃and 164~176℃,which further proves that the deposits were formed in the middle and low temperature conditions.Moreover,the fact that the temperature decrease far away from the Huayuan-Zhangjiajie fault indicates that the Huayuan-Zhangjiajie fault may be the path of ore-forming solution.In general,the trace element characteristics of sphalerite in the area are similar to those of typical MVT type lead-zinc deposits.In the trace element characteristic diagram,the sample points are highly consistent with the projection area of MVT type deposit.Based on the geological characteristics of the deposit and trace element characteristics of sphalerite,the Huayuan Pb-Zn deposit belongs to MVT type Pb-Zn deposit. |
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| Keywords: | sphalerite trace element LA-ICP-MS MVT type deposit Huayuan Pb-Zn ore field |
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