| 内蒙古鄂伦春旗那吉河铅锌银矿床地质特征及成因 |
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| 引用本文： | 吴德成.内蒙古鄂伦春旗那吉河铅锌银矿床地质特征及成因[J].地质与勘探,2014,50(5):855-863. |
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| 作者姓名： | 吴德成 |
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| 作者单位： | 北京建龙国基投资有限公司，北京； 江西省地质矿产勘查开发局赣东北大队，江西上饶 |
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| 摘 要： | 那吉河铅锌银矿床产出于大兴安岭成矿带北段，目前所控制的资源储量规模达到中型，是该区近年来为数不多的找矿成果之一。矿体主要赋存于侏罗系上统流纹岩、火山碎屑岩和安山岩中，呈平缓倾斜的似层状或透镜状，受层间构造裂隙系统控制。成矿流体主要来自火山期后热液，后期有地表水的加入。成矿物质主要为深部来源（幔源），以及对古老地层中的成矿物质的萃取。矿床形成时代为燕山中-晚期，与中国东部中生代大规模成矿事件时间一致。矿床类型为与中酸性火山岩浆侵入作用有关的中-低温火山热液型矿床。认为在已知矿床深部有可能存在斑岩型矿床，矿床边部发现银品位达几千×10-6的银矿化，有望找到独立的银矿床。
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| 关 键 词： | 铅锌银矿床 地质特征 矿床成因 那吉河矿区 大兴安岭成矿带北段 |
| 收稿时间： | 2013/11/5 0:00:00 |
| 修稿时间： | 2014/3/20 0:00:00 |
Geological characteristics and genesis of the Najihe Pb-Zn-Ag deposit in Elunchun county, Inner Mongolia |
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| Wu De-cheng.Geological characteristics and genesis of the Najihe Pb-Zn-Ag deposit in Elunchun county, Inner Mongolia[J].Geology and Prospecting,2014,50(5):855-863. |
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| Authors: | Wu De-cheng |
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| Institution: | Beijing Jianlongguoji Investment Company Limited, Beijing; The North-East Party, Jiangxi Bureau of Geology and Mineral Resources, Shangrao, Jiangxi |
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| Abstract: | The Najihe Pb-Zn-Ag deposit is located in the northern section of Daxingan Mountain metallogenic belt, and its ore reserves are estimated to be mid-scale at present, which is one of the few exploration results in recent years. The ore bodies are gently sloped lenticular and stratiod, and are controlled by fractures within strata and hosted by upper Jurassic rhyolite, volcanic clastic rocks and andesite. The ineralizaiton fluids were originated from the late volcanism and atmospheric water in late stage. Metallogenic materials were mainly from mantle and partly extracted from ancient stratum. It was formed in the mid-late Yanshanian in accord with the Mesozoic large-scale mineralization event in east China. This deposit is a mid-low temperature hydrothermal one associated with mid-acid magma intrusion. Silver mineralization with Ag grade of several thousands of ppm was found near this deposit, and it is hopeful to search for a single Ag deposit and porphyry ore deposit in the deep of this district. |
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| Keywords: | Pb-Zn-Ag deposit geological characteristics deposit genesis Najihe ore district northern section of DaHinggan Mountain metallogenic belt |
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