Geological Characteristics And Prospecting Prediction Of Niujiaotang Lead-zinc Deposit,Southern Guizhou

The Qiannan Depression is one of the important lead-zinc deposits in southern China.There are Huaxi lead-zinc ore fields in western Hunan,Songtao smell brain lead-zinc deposit in northeast Guizhou,Tongrenbukou field in northeast Guizhou-pond slope zinc Deposits,Niujiaotang lead-zinc deposit in Qiannan,and other typical MVT-type lead-zinc deposits.The object of this study: The Niujiaotang Lead-Zinc Deposit is the lead-zinc deposit with the largest proven reserves and the most representative geological characteristics of the deposit.The study of the geological characteristics of the deposit shows that:(1)During the carbonate carbonate platform carbonate production in the Niujiaotang deposit,the tectonic background is similar to the lead-zinc deposits in other areas around the Yangtze platform;(2)the ore bodies are concentrated in Among the Cambrian carbonate rocks,the lithological combinations that are closely related to mineralization are the lithological boundaries of coarse-grained dolomite,oolitic dolomite,and argillaceous dolomite;(3)The ore bodies are mostly layered and layer-like.And lenticular,a small number of ore bodies are irregular or cylindrical,breccia-like ore can be seen in the tectonic development area;(4)the development and morphological distribution of ore bodies are significantly controlled by faults and interlayer structures,mainly eroded breccia,The areas where tectonic breccias and interlayer slippage are developed are areas where the ore bodies are concentrated;(5)There are few mineral types and the combination is relatively single.The main ore minerals in most deposits are sphalerite,pyrite,galena,and the degree of erosion is relatively High ore deposits are siderite,siderite,etc.;(6)Trace and rare earth element characteristics indicate that in addition to Zn and Cd,Niujiaotang lead-zinc ore-associated gangue minerals show that all other uncles have the same performance.Loss,hydrothermal calcite and perimeter The rocks have consistent rare earth distribution patterns,are all light rare earth enriched,and have the characteristics of positive Ce anomaly and negative Eu anomaly,indicating that the ore-forming environment is a reducing environment.The above characteristics show that the Niujiaotang lead-zinc deposit is similar to other typical deposits in the western Hunan-Qiandong metallogenic belt.Based on the geochemical studies of previous deposits,the Niujiaotang lead-zinc deposit is considered to be a typical MVT-type lead-zinc deposit.The collection and analysis of geophysical prospecting and scientific research results in the area show that the physical properties of lead-zinc ore bodies,structures,and surrounding rocks in the area are significantly different.When using the geophysical prospecting galvanometer to sweep the surface,the effect is obvious,and it has a good prospecting effect.Based on a comprehensive summary of the ore-forming geological background and lead-zinc ore-controlling geological conditions in the area,combined with the known distribution of ore deposits,points,and ore bodies,this article follows the principle of minimum area and maximum ore content.The locations where all kinds of mineralization information are concentratedly displayed define the prospecting target area.