Geological Characteristics And Genesis Of Luowugou Lead-Zinc Ore Deposit In Puge County,Sichuan Province

The Luogou Pb-Zn deposit in Puge County is located in the upper Yangtze platform lead-zinc zone,is an important lead-zinc mine in Sichuan Province.In this paper,the Luogou Pb-Zn deposit in Puge County was chosen as the research object,and geological,geophysical and geochemical exploration activities have been carried out.Through the research on the large potential mineralization area of Puge County,the macro characteristics of the orebody are determined in the field work.Combined with indoor analysis,the mineral composition,chemical composition,structure and structure of the ore in the deposit and the alteration of the surrounding rock have been identified.Finally,the geological characteristics of the lead-zinc deposits in the area are summarized and the genesis of the deposit is analyzed.The purpose is to guide the further identification and delineation of lead-zinc ore body,provide scientific basis for accurately grasping the characteristics of lead-zinc reserves,analyzing prospecting prospect and subsequent industrial exploitation.The Luowugou lead-zinc deposit mainly occurs in the Dolomite strata in the Cambrian and Ordovician series and belongs to the sedimentary-altered Pb-Zn deposit in carbonate rocks.The main ore minerals are sphalerite,galena,a small amount of pyrite and limonite.The main gangue minerals are wollastonite,dolomite,barite and so on.Chemical composition,in addition to the main metal Zn,Pb and associated elements Ag content higher,there is a higher content of Gr and Ba.The Luowugou lead-zinc deposit is mainly divided into ore body,ore body,? ?? ore body,?ore body.Among them,No ?ore body has not been exposed completely in the study area.The occurrence of the ore body is controlled strictly by the broken zone in the rock formation,and the ore-bearing hydrothermal fluid penetrates along the broken zone in the rock formation.The lead-zinc deposits in the study area belongs to sedimentary-altered lead-zinc deposits.At present,the formation of Luowugou lead-zinc deposit has undergone two stages of mineralization: sedimentary mineralization and hydrothermal mineralization.It is because of going through two different metallogenic stages that Luowugou Pb-Zn deposit has the dual characteristics of sedimentary deposits and hydrothermal deposits.During the geochemical exploration work on the mining area,all the anomalous zones within the dolomite fractured zone in the area are anomalies related to the mineralization.These anomalies are mainly distributed in the interlayer crustal belt of dolomite strata in the mid-Ordovician Daqing Formation,and the data presented show a good prospecting prospect.Through the existing prospecting projects,it is found that the ore body extends along the trend more steadily.According to data from previous exploration projects in the study area,the maximum depth control of ore bodies in the study area is only 103 m.By further exploration of deep ore bodies,more resources and more resource category can be obtained.The lead-zinc anomaly soil delineated in the northern part of the study area has the characteristics of large area,high concentration and complete zonation.Through further work,it is expected that more lead-zinc ore bodies with industrial value will be discovered.