Metallogenic Regularity And Metallogneic Prediction On Pb-Zn Polymetallic Ore Deposits In The Saiduopugangri Region Qinghai Province

SaiDuogangGangri area is located in Yanshiping Pb-Zn-Fe(W,Sn,Sb)mineral belt of Qinghai.At present,more than 7 ore deposits and mineralization sites have been discovered.This paper takes Chuduoqu lead and zinc deposits,Jingriqiangma lead?zinc?silver mineralization point,Gangriqiangma copper mineralization point as the research object,fully collects predecessor's data,grasps the metallogenic geological background of this area,which is based on field geological survey,geochemistry and geophysics of mineral deposits research work.This paper discusses the origin of ore deposits,establishes the metallogenic model,summarizes the metallogenic laws,ore-control conditions and ore prospecting marks,and makes ore-forming predictions on the basis of this.Through the above work,we can get the following understanding.(1)The study shows that the Middle and Late Jurassic clastic rocks in the shallow-marine-sea-alternary facies deposits in the region contain higher Cu?Pb?Zn?and Ag,which have the role of a mineral source layer.The quartz positive porphyry during the Hiyama period provided the source and heat source for the formation of hydrothermal lead-zinc polymetallic ore.The North West distribution of the fracture structure in the area is the enrichment of Cu?Pb?Zn?and Ag,which plays the role of mineral conductivity and mineralization.(2)The hydrothermal lead-zinc polymetallic minerals in the research area are controlled by the back-continental basin of Yanshiping arc,and the geochemical and geophysical anomalies of the northwestward distribution are formed.The fracture in the zone develops and most of the deposits and mineral sites in the research area are distributed among them,which has laid a direction for prospecting in the study area.(3)The spread of fracture structures in the area,which controls the distribution and output of mineralized bodies and alteration zones in the area.(4)According to the known ore(chemical)points and mineralization clues that have been identified in the area,according to the known ore points,mineralization points and mineralization clues that have been identified in the area,and the distribution of important Geophysical and geochemical anomalies,combined with the construction of ore-bearing rocks and important ore control structures,three ore-seeking scenic spots have been set up,which are beneficial to 5 ore target areas.