| 西藏当雄县尼拢玛铅锌矿地球化学异常特征及找矿方向 |
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| 引用本文： | 李及秋,郑占雾,叶吉文.西藏当雄县尼拢玛铅锌矿地球化学异常特征及找矿方向[J].矿产与地质,2016(5):783-788. |
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| 作者姓名： | 李及秋 郑占雾 叶吉文 |
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| 作者单位： | 1. 河南省核工业地质局，河南 信阳 464000; 西藏华钰矿业股份有限公司，西藏 拉萨 850000;2. 西藏华钰矿业股份有限公司,西藏 拉萨,850000;3. 广西有色金属集团资源勘查有限公司,广西 南宁,530022 |
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| 摘 要： | 西藏当雄县尼拢玛铅锌矿位于冈底斯成矿带北带之拉屋―嘉黎成矿带西段,区域上铅锌矿床较多,成矿条件有利。本文根据已知矿体特征及化探异常特征,对矿区进一步找矿方向进行分析,认为矿区F3断裂以北地段显示较好的Pb、Zn、Ag、Sb等元素综合异常,异常中心明显、衬度高、峰值高,且该异常沿推测断裂带分布,与已知矿体位置一致或几近平行,表明异常具有较好的找矿潜力;矿区F3断裂带以南存在Cu、Au、W、Sn综合异常,该异常沿背斜和白云母二长花岗岩体外接触带分布,地质背景及化探异常特征与拉屋矿区类似,表明其具有寻找中高温金属矿床的远景。
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| 关 键 词： | 铅锌矿 地球化学 异常特征 找矿方向 尼拢玛 西藏 |
The geochemistry anomaly characteristics and prospecting direction in Nilongma Pb-Zn deposit in Damxung County of Tibet |
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| Abstract: | Nilongma Pb-Zn deposit in Damxung,Tibet is located in the west part of Lawu-Jiali metallogenic belt within the north part of Gangdise metallogenic belt.There are some Pb-Zn deposits with favorable met-allogenic condition in the region.Based on geochemistry anomaly feature and known orebody features,and further research of prospecting direction,this paper has proposed that there is a comprehensive anomaly of Pb-Zn-Ag-Sb and other elements within the north area of fracture No.F3 in the deposit.The element anoma-ly center is obvious with high contrast and high peak value,and along the presumed fault belt,which is on the same location of the known orebody or in parallel to their strike to indicate a good prospecting potential in abnormal position.There is another comprehensive anomaly of Cu-Au-W-Sn within the south area of fault belt No.F3 in the deposit,which along the anticline and the outer contact zone of muscovite adamellite gran-ite.As the geological background and geochemical anomalies are similar to those of Lawu deposit,it is indica-ted that there is a good potential to find out middle-high temperature metal deposits in the region. |
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| Keywords: | Pb-Zn deposit geochemical anomaly characteristics prospecting direction Nilongma Tibet |
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