河南省露宝寨银铅矿床地质特征及找矿标志  

The Geological Characteristics and Prospecting Indicators of Lubaozhai Ag-Pb Deposit in Henan Province

作　　者：丁世先 陈曦 耿咏梅 DING Shixian;CHEN Xi;GENG Yongmei(Henan Nonferous Metals Geological Exploration Institute,Zhengzhou 450052,China;Key Laboratory of Deep Ore-prospecting Technology Research for Non-ferrous Metals of Henan Province,Zhengzhou 450052,China)

机构地区：[1]河南省有色金属地质勘查总院,郑州450052 [2]河南省有色金属深部找矿勘查技术研究重点实验室,郑州450052

出　　处：《河南科学》2019年第11期1848-1854,共7页Henan Science

基　　金：河南省地质勘查基金项目资助（编号32）

摘　　要：通过露宝寨银铅矿床地质特征及找矿标志研究,认为矿区位于熊耳山东段,大地构造单元属华北古板块南缘华熊地体中部的熊耳山隆起带.华熊地体呈典型的盆、岭相间的盆岭地貌特征,熊耳山呈北东向隆起,南北两侧为北东向的洛宁盆地和潭头-嵩县盆地,成矿区带隶属熊耳山贵金属-有色金属成矿带.该区查明矿体属陆相火山热液型矿床,成矿发生在火山盆地边缘隆起区的次火山岩发育区的构造系统,控矿构造主要有基底褶皱、断裂和次火山岩体构造等,矿体围岩呈充填贯入接触,主要类型为石英脉型,且矿化体类型较为单一.矿化体常有膨胀、收缩、分枝复合、尖灭再现或尖灭侧现的现象.古老的太古宇太华群地层中有强烈燕山期构造--岩浆活动部位是银多金属矿形成的有利区域背景条件;硅化、绢云母绿泥石化等蚀变,以及次生氧化物褐铁矿、铁锰矿等铁帽或铁锰帽等,是找矿的直接标志.Based on the geological characteristics and prospecting indicators of Lubaozhai Ag-Pb Deposit,it is considered that the mining area is located in Eastern sector of Xiong’er mountain,which belong to the Xiong’er mountain uplift zone in the central part of Huaxiong terrane in the southern margin of North China ancient plate.The Huaxiong terrane is a typical basin-ridge geomorphological feature with alternating basins and ridges.The Xiong’er mountain uplift is NE-trending and the north and south sides are NE-trending Luoning Basin and TantouSongxian Basin.The metallogenic belt belongs to the Xiong’er mountain precious-nonferrous metal metallogenic belt.The deposit is the continental volcanic hydrothermal deposit.The metallogenesis occurs in the tectonic system of the subvolcanic rock development area which is located in the marginal uplift area of the volcanic basin.The orecontrolling structures mainly include basement folds,faults and subvolcanic rock structures.The ore body fill into the wall rock.And the main type is quartz vein,and the type of mineralization body is relatively single.The mineralization body often exhibit swelling,contraction,branching,pinch-out reappearance or pinch-out sideways phenomena.The strong Yanshanian tectono-magmatic active sites in the strata of the ancient Archean Taihua Group is the favorable regional background conditions of the silver polymetallic deposit;the direct prospecting indicators are alteration of silicification,sericite chlorite,and gossan or umber cap such as the secondary oxide limonite and Fe-Mn mineral.

关 键 词：露宝寨 银铅矿床 火山热液型 地质特征 找矿标志 

分 类 号：P542.2[天文地球—构造地质学]