Geophysical Anomaly Interpretation And Prospecting Prediction Of Yancheng Pb - Zn Deposits In Jiangcheng, Yunnan Province

Yanjiao lead-zinc mine is located at south of the Lanping-Simao mesozoic depression basin,in the Puer-Jiangcheng depression basin,13km away from the southwest of Jiangcheng county, belt between the Lixianjiang fault and Babianjiang fault. Deposit experienced two stages of sedimentation-diagenesis and supergene reformation.The paper is based on basic geology and geological investigation of field, on the basis of collecting a large number of geologic materials and analysis and research of a lot of macro and microscopic data,the mineralization and ore genesis were studied in this paper. It is suggested that the deposit is sedimentary-reformed stratabound pb-zn deposits. Ore-forming process divided into two mechanism that syngenetic location and epigenetic location, which has the mineralization of multi-resources, a variety of metastasis and influx system,and a variety of superposition.The transformation of hot brine is more important for mineralization and rich.On the basis of aforesaid work foundation, Obtain of the main achievements by means of the study of minerotect, ore-controlling structure, binding of macroscopic study microcosmic study. The main achievements of this thesis are listed as following:1. This paper analysis main factors of ore-controlling,the paper holds that deposit controlled by structure, formation and lithology, structure is the most significantly of ore-controlling, deposits all hosted in the Jingxin formation of under Cretaceous, ore-bearing rock is better sorting gray-offwhite fine-medium grain quartz sandstone.2. The main achievements of this thesis that obtained by means of induced-current middle-gradient and audio frequency magnetotelluric method are listed as following:this paper understand the induced electrical characteristics of mining area, the geological boundary of partial formation and the distribution of outcrop in fault structure is verified,and 5 abnormal induced electrical area have been delineated, verified 2 first order tectonic and 1 secondary structural, It can be inferred 5 first order tectonic and 7 secondary structural,there are 8 first order anomaly area and 3 secondary anomaly area,and 4 favorable metallogenic belt.3.On the basis of comprehensive research,the paper summarize metallogenic prognosis systematically,5 favourable target area for mineralization are proposed, and Analyze the prospecting potential of predicting area.