Study On Characteristics And Prospecting Marks Of Pb-zn-cu Deposit Outside Jinxing Mining Area Of Keshiketenqi,inner Mongolia

The study area is located 20 km southwest of Bayanchagan Sumu,Keshiketeng Banner,Inner Mongolia Autonomous Region.The geotectonic location is located in the central trough fold system in Inner Mongolia(II)Sunite Right Banner,late Hualixi trough fold belt(II4)The west edge of the Zhesi-Linxi complex syncline(II41),the southern margin of the Daxinganling volcanic rock belt,and the west side of the Daxinganling main ridge deep fault.The lead-zinc-silver polymetallic ore body in the study area is produced in the near-south-north-north and north-west fault fracture zone,and the fracture zone has been filled by the Hualixi or Yanshanian diorite,and the surrounding rock of the ore body is flash length.Based on the project of “Special Investigation of Lead,Zinc and Silver Deposits in the Venus Mining Area”,the paper selects the geological characteristics of the lead-zinc-silver deposits in the periphery of the Jinxing mining area and the research contents of the genesis.The research has important guiding significance for further prospecting in the area.Based on the existing data collected in the study area,the field geology background,deposit characteristics,deposit genesis and ore-controlling factors of lead-zinc deposits are mainly studied through field work and indoor comprehensive test analysis.According to the study,the deposit is controlled by the north-western Nyimadu-Bayincha dry-torsion fracture(fracture)layer and the northwest-oriented Jilin Guole extensional torsion(fracture)layer.A series of fractured(fracture)structures derived from different sub-levels derived from the sub-levels form the main tectonic framework of the area;the lead-zinc-silver-copper deposits are distributed in diorite or diorite The surrounding rock of the ore body is diorite porphyrite,the ore body is vein-like and lenticular,the ore is lead-zinc mineralized diorite porphyrite(diazoite),and the mineral composition is sphalerite,galena,pyrite.And a small amount of pyrite,chalcopyrite,the mineral combination is a typical combination of medium and low temperature minerals,so the deposit is a medium-low hydrothermal filling vein deposit.The obvious near-mineral surrounding rock alteration is a direct prospecting sign.Due to the presence of limonite mineralization,silicification,chlorite and sericitization near the ore body,the localized fluorite mineralization makes the surface color of the surrounding rock easy.The recognized brownish purple color is more eye-catching and intuitive.The outer contact zone,which is generally about 0.5-2 km away from the Yanshanian granitoid complex,is a favorable part for finding such deposits.The abnormal polarization rate and the abnormal resistivity of the IPR are important indirect prospecting indicators,especially the wide anomalous zone between 3-5% of the polarizability value,which provides a clear indication for finding blind ore bodies.