内蒙古五岔沟地区物化探异常特征及找矿前景  

Characteristics of Geophysical and Geochemical anomalies and Ore-search Prospect in the Wuchagou area,Inner Mongolia

作　　者：肖明尧[1] 费新强[1] 

机构地区：[1]中国冶金地质总局中南地质勘查院,湖北武汉430081

出　　处：《地质与勘探》2011年第5期876-884,共9页Geology and Exploration

摘　　要：以1∶10000物化探异常查证成果为基础,依据内蒙古大兴安岭南段成矿带的多金属矿成矿规律,详细分析了五岔沟地区的物化探异常特征,总结出了两种典型的物化探异常类型,一种以Pb、Zn、Ag为主要成矿元素,元素组合为Cu、Pb、Zn、Ag、Bi、Sn、Au、As、Sb、Hg,一般以低阻高极化为特征;另一种以Mo为主要成矿元素,元素组合简单,主要为Mo、W族元素,其它元素如Sn、Bi、Pb等零星分布其间,一般以高阻高极化为特征。通过物化探异常分析并结合地质特征,总结出了成矿模式,分析了气成-热液型Pb、Zn、Ag多金属矿或斑岩型Cu、Mo矿的找矿前景,并提出了找矿方向。This work is based on the verification to geophysical and geochemical anomalies on a scale 1：10 000 and ore-formation rules of polymetallic ores in the southern metallogenic belt of the Daxing＇an Mountain range,Inner Mongolia.We have made a detailed analysis on the characteristics of geophysical and geochemical anomalies in the Wuchagou area,and suggested that these geophysical and geochemical anomalies can be classified into two types.One is dominated by metallogenic elements Pb,Zn,and Ag with the element combination of Cu,Pb,Zn,Ag,Bi,Sn,Au,As,Sb,and Hg,generally featured by low resistivity and high polarization.Another takes Mo as the main metallogenic element with simple element combination mainly of Mo and W family,and other elements such as Sn,Bi,and Pb which are scattered among them,generally characterized by high resistivity and high polarization.Through analysis on geophysical and geochemical anomalies and in combination with the geologic features,we suggest a metallogenic model,analyze the prospect of ore exploration to polymetallic ores Pb,Zn,and Ag of the pneumatolytic-hydrothermal type,or Cu,Mo ores of the porphyry type,and propose the direction of ore search in this area.

关 键 词：物化探异常 找矿前景 成矿模式 五岔沟地区 

分 类 号：P631[天文地球—地质矿产勘探] P632[天文地球—地质学]