Ore-forming Geological Conditions And Prospective Evaluation Of Fe And Pb-Zn In Weina River Area,Inner Mongolia

The geotectonic position of study area in Da Xing’anling Range-Co-Inner Mongolia geosynclinal folded system(grade Ⅰ),Da Xing’anling geosynclinal folded system(sub Ⅰgrade),Xigui Tuqi china force geosyncline fold belt(grade Ⅱ),Xigui Tuqi complex anticline(grade Ⅲ),Zhongshishan-zhongdaoshan fold belt(Ⅳ).In this paper,based on the project "mineral geological survey in Wiener River of Inner Mongolia hulunbier city",carry out the system to collect and analysis the predecessors in the area of geological,geophysical and geochemical exploration data,the study of ore-forming geological conditions,geophysical and geochemical information systematically,propose the research area delineation of ore prospecting model,metallogenic prediction,optimization prospecting target area,pointed out the direction for further prospecting work in research area.The following are the main points of this thesis:In the area of Lizeshan and Zhongdaoshan iron ore produced in granite and lower middle Ordovician middle Duobaoshan formation marble contact zone skarn and its outer,genetic type belongs to skarn type.Wiener River lead-zinc ore produced in Hongshuiquan formation of argillaceous siltstone,chlorite sericite slate,silicified slate and fine-grained feldspar sandstone,genetic type belongs to magmatic hydrothermal type.In the area close to the mineralization strata in Ordovician middle Duobaoshan formation,the lower Carboniferous Hongshuiquan formation.The magmatic rocks are related to the intermediate acid magmatic rocks formed by acid magmatism in the Late Carboniferous and early Jurassic.The study area is affected by the NE trending tectonic belt,and the fracture is mainly dominated by NE trending and EW faults.The metallogenic epoch,the relationship between the main mineralization period and late Variscan early Yanshan period magmatic activity closely.The study area of skarn,pyrite mineralization,limonite mineralization,carbonation is to find gold,copper,iron,lead,zinc,molybdenum ore direct prospecting signs.The slate development zone is a direct prospecting mark for gold,lead,zinc and molybdenum ore,which is changed to silicification,chlorite,chlorite and carbonation.Ore body in the surface and near the surface easy to form a variety of oxide gossan.Combining with the geological characteristics,prospecting criteria and comprehensive study of geochemical information and metallogenic regularities,establish 2 models for prospecting,and delineate the Lizeshan iron(molybdenum)and other polymetallic metallogenic prediction area(grade Ⅰ),the Weiner River hulunbier polymetallic grade Ⅱmetallogenic prediction area each one,preferably two prospecting target area.