物探方法在松桃县盘石铅锌矿区的应用研究  

Application Research of Geophysical Method on Lead-zinc Mine Area in Panshi,Songtao County

作　　者：张德实[1,2] 杨炳南[1] 何帅[1] 沈小庆[1,2] 严学春[1] Zhang Deshi;Yang Binnan;He Shuai;Shen Xiaoqing;Yan Xuechun(Geologic Party103, Guizhou Bureau of Geology & Mineral Exploration and Development, Tongren Guizhou 554300, China;School of Earth Sciences,China University of Geosciences, Wuhan Hubei 430074, China)

机构地区：[1]贵州省地矿局103地质大队,贵州铜仁554300 [2]中国地质大学地球科学学院,湖北武汉430074

出　　处：《工程地球物理学报》2020年第4期447-456,共10页Chinese Journal of Engineering Geophysics

基　　金：贵州省科技支撑项目(编号:黔科合支撑[2019]2868号);贵州省地质矿产勘查开发局地质科学研究项目(编号:黔地矿科合[2016]07号)。

摘　　要：盘石铅锌矿区位于贵州省松桃县盘石镇,是区域性大断裂-红石断裂与保铜玉断裂夹持地带铅锌矿点集中分布区之一。目前已经在含矿层位出露的西部区域发现有粑粑寨、嗅脑等矿点,而深部隐伏区域铅锌矿找矿勘查工作投入较少,进展缓慢。为了勘查工区含矿层位隐伏的东部区域,给地质找矿圈定新的靶区提供物探依据,以松桃-铜仁地区矿产地质调查项目为依托,在东区依次实施了双频激电法、音频大地电磁法、频谱激电法三种物探方法的测量。综合分析研究表明,利用双频激电法视幅频率可圈定面积性的矿化体异常,而频谱激电法进一步明确双频激电法圈定异常的纵向深度和范围,音频大地电磁法能大致划分组合地层纵向电性层位以及识别断层构造,该三种方法相互印证,相互补充,在反映矿化激电特征、划分地层电性组合、识别断层构造等方面效果较好,能够为划定找矿靶区提供依据,为同类型铅锌矿勘查提供参考。Panshi lead-zinc mining area,located in Panshi town of Songtao county,Guizhou province,is one of the concentrated distribution areas of lead-zinc deposits in the clamping zone of Hong Shi fault and Bao Tongyu fault.In many mineral deposits such as BaBa village and Xiunao in the western region the ore-bearing strata are exposed.However,less investment has been put into the prospecting and exploration of lead-zinc deposits with slow development in the deep hidden area.In order to prospect the ore-bearing bed in the eastern part of a concealed area and provide the geophysical basis for delineating the new target to geological prospecting,three geophysical methods(double-frequency induced polarization method,audio magnetotelluric method and frequency spectra IP method)have been applied successively based on mineral geology survey project in Songtao-Tongren area of the eastern region.Results show that the area mineralization anomaly can be delineated using dual-frequency IP method depending on the amplitude frequency,and the frequency spectra IP method to further clarify the vertical depth and scope of anomaly delineated by dual-frequency IP method,as well as audio magnetotelluric method can be roughly divided into strata vertical electrical horizon and to identify the fault structure.These three methods verify and complement each other to reflect the good effects of the mineralization characteristics,classification of IP formation electrical combination,and identification of fault structure,providing the basis for defining prospecting target areas and a reference for the lead-zinc deposit exploration for the same type.

关 键 词：铅锌矿 双频激电法 音频大地电磁法 频谱激电法 

分 类 号：P631.3[天文地球—地质矿产勘探]