摘要
银水寺铅锌矿床位于大别造山带北缘,是大别山地区最大的矽卡岩型矿床。20世纪90年代至2005年,安徽省地质矿产勘查局313地质队先后在银水寺铅锌矿外围发现黄冲、黑石崖和庙冲等多个铅锌矿点,今后银水寺地区仍然是寻找多金属矿的有利位置。CSAMT法是以电偶源为信号源的人工频率电磁测深法,优点是勘探深度大及抗干扰能力强等。为了解银水寺地区电性结构特征、区内断裂构造分布情况等,2015年11月,在该区开展了可控源音频大地电磁(CSAMT)测量,对采集的原始数据进行预处理、静态校正等;然后进行二维电阻率反演并绘制电阻率断面图;根据研究区地质情况推测区内断裂构造分布情况,进一步圈定成矿有利部位,为找矿提供有利依据。结果表明,CSAMT法在寻找隐伏构造方面有很好的应用效果。
Yinshuisi lead-zinc deposit is located on the northern edge of the Dabie orogenic belt and is the largest skarn deposit in the Dabie Mountains.From the 1990 s to 2005,the 313 Geological Team of the Anhui Provincial Bureau of Geology and Mineral Exploration discovered several lead-zinc deposits such as Huangchong,Heishiya and Miaochong on the periphery of the Yinshuisi Lead-zinc Mine.In the future,the Yinshuisi area will remain Look for favorable locations for polymetallic mines.The CSAMT method is an artificial frequency electromagnetic sounding method with a galvanic source as the signal source.The advantages are large exploration depth and strong anti-interference ability.In order to understand the electrical structure characteristics of the Yinshuisi area,the distribution of fault structures in the area,etc.,in November 2015,a controllable source audio magnetotelluric(CSAMT)measurement was carried out in the area,and the collected raw data were preprocessed and statically corrected.Then,two-dimensional resistivity inversion was carried out and the resistivity section was drawn.According to the geological conditions of the study area,the distribution of fault structures in the area was inferred,and favorable locations for mineralization were further delineated to provide a favorable basis for prospecting.The results show that the CSAMT method has a good application effect in finding hidden structures.
作者
范长丽
倪鹏
FAN Changli;NI Peng(Anhui Institute of Geophysical and Geochemical Exploration Technology)
出处
《现代矿业》
CAS
2021年第5期28-32,共5页
Modern Mining
关键词
可控源音频大地电磁测量
多金属矿
推覆构造
controlled source audio magnetotelluric survey
polymetallic mine
nappe structure
