方城县韩家庄铌矿地质特征及找矿标志  

Geological Characteristics and Prospecting Criteria in Hanjiazhuang Niobium Mine in Fangcheng County

作　　者：张同林 温国栋 芦光播 王俊 张盼盼 曾庆海 ZHANG Tonglin;WEN Guodong;LU Guangbo;WANG Jun;ZHANG Panpan;ZENG Qinghai(Nuclear Geology Bureau of Henan Province)

机构地区：[1]河南省核工业地质局,河南省郑州市410108

出　　处：《现代矿业》2021年第8期10-15,共6页Modern Mining

基　　金：河南省2016年度省财政地质勘查项目(项目编号:33)。

摘　　要：韩家庄铌矿产于华北陆块南缘北秦岭造山带东段,栾川—明港深大断裂北侧。铌矿体呈北西向,似层状、脉状分布,赋存在王家营岩体内部相细晶岩脉、南泥湖组石英岩内。对铌矿体地质特征进行了总结,对含铌矿化细晶岩采用化学分析、岩矿鉴定、电子探针等方法进行了研究。结果表明,王家营岩体内部相绿帘钾长细晶岩、角闪钾长细晶岩铌含量较高,矿石矿物为铌铁矿、铌钙矿。磁性、ΣREE、Rb、Sr、Ba、Ga、Zn、Ti、Ta等矿化与铌矿化关系密切;放射性强弱(钍异常)与铌矿化呈正相关关系。这些矿化信息为进一步的找矿勘探提供了重要线索。Hanjiazhuang niobium deposit is located in the eastern part of the North Qinling orogenic belt on the southern margin of the North China Block,and the northern side of the Luanchuan-Minggang deep fault.Niobium ore bodies are NW-trending,stratoid,vein-like distribution,hosted in the Wangjiay⁃ing rock internal facies vein,Nannihu quartzite.The geological characteristics of niobium ore bodies were summarized,and the methods of chemical analysis,rock and mineral identification,and electron probe were used to study the Nb-bearing mineralized fine crystal rock.The results show that the content of niobi⁃um in the green curtain K-feldspar and hornblende K-feldspar in Wangjiaying rock mass is high,and the ore minerals are niobite and niobite.Magnetism,ΣREE,Rb,Sr,Ba,Ga,Zn,Ti,Ta mineralization are closely related to niobium mineralization.Radioactivity(thorium anomaly)is positively correlated with nio⁃bium mineralization.These mineralization information provides important clues for further prospecting and exploration.

关 键 词：铌矿 地质特征 找矿标志 细晶岩 

分 类 号：P618.79[天文地球—矿床学]