The Geological Characteristics And Metallogenic Prognosis Of Chabuqiren Area In Dongwuzhumuqin Qi County

Inner Mongolia the study area is located in Tianshan-Xingmeng orogenic system(grade 1),Daxing'anling arc-basin system(grade l),Dongwuqi-duobaoshan island arc(grade ll).It is a part of the east Ujimqin Banner structural belt of the Inner Mongolia arc fold belt and a small part of the Xinhuaxia great Xing'an mountains uplift belt.Based on the project of "Pre-investigation of Chabuqiren Ag-polymetallic deposit in Dongwuzhumuqin county,Inner Mongolia",this paper mainly discusses the genesis of the deposit,systematically summarizes the metallogenic regularity of the deposit,and makes a preliminary evaluation of the prospecting prospect of Chabuqiren Ag-polymetallic.The main strata exposed in the study area are Upper Carboniferous-Lower Permian Baoli Gaomiao Formation,Upper Jurassic Manketou Obo Formation,Holocene alluvial-diluvial deposit and lacustrine deposit.Intrusive rocks are well developed in the middle part of the study area,showing a north-east distribution,which can be divided into porphyritic biotite monzonitic granite,granite porphyry and other rock types.The age is late Devonian and early Cretaceous.The main structural features are folds,followed by faults.Yanshanian structure is the main structure in the region,which plays a very important role in controlling the distribution and structural pattern of geological bodies in the region.Their presence is crucial Acidic magmatism and mineralization play a controlling role and create a favorable space for the formation of minerals On the basis of geological mapping,through large-scale geological,geophysical and geochemical survey and surface trench engineering disclosure and deep drilling engineering verification,On the basis of geological mapping,through large-scale geological,geophysical and chemical survey and surface trench engineering exposure and deep drilling engineering verification,we can find out the geological conditions of mineralization;roughly understand the distribution,size,shape,occurrence and grade changes of ore;roughly understand the material composition and ore quality.And carries on the corresponding comprehensive appraisal.It is considered that the ore bodies in the study area occur in the contact zone between the exhumed facies rhyolite of the Manketou Obo Formation and the metamorphic sandstone of the Baoli Gaomiao Formation,which is controlled by the structural fissures in the NE direction,and the silicification and epidotization of the surrounding.Metallic oxides such as limonite mineralization and pyrolusite mineralization are the direct criteria for ore prospecting.It is believed that the genetic type of the deposits in the study area is a meso-low temperature hydrothermal lead-zinc deposit controlled by structural fissures.It provides a theoretical basis for the next step work of the study area.