Metallogenic Characteristics Of "Trinity" And Prospecting Prediction In Dachang Mining Area Of Qinglong,Guizhou Province

Guizhou Qinglong Dachang Mine Area is one of the important producing areas of antimony and gold in Guizhou Province.The study area is located in the Xingyi uplift-basin tectonic deformation zone,which is also called Xingyi uplift area.The sedimentary caprocks exposed in the shallow crust of the study area are mainly Late Paleozoic and Mesozoic strata.The sedimentary action is mainly marine sedimentation,and the marine-continental transitional phase.The second is the continental sedimentation,and the volcanic overflow of the continental volcanic overflow basalt in the middle and late Middle Permian.The exposed strata are the Permian,Triassic,Cretaceous,and Quaternary.Under the action of tectonic stress,the sedimentary caprocks in the Late Paleozoic are characterized by a combination of fault blocks inlaid by the “Graben-Horst”,which is mainly composed of NE and NNE strike.The faults are partially developed in the northwest and near-north-north faults;and a large number of NE,NW,and NNE dorsal obliques are arranged in parallel.The main minerals are strontium and gold.The typical deposits include Qinglong Dachang Antimony Mine and Shuiyindong Gold Mine.In this paper,the "trinity"-metallogenic geological body,metallogenic structure,metallogenic structural surface and metallogenic characteristics are studied.The genesis of the deposit,the age of diagenesis and mineralization,and the metallogenic mechanism and prospecting model are established.Based on the existing research results,this paper presents an inversion of the intercepted two-dimensional section in the three-dimensional space form by geophysical exploration: there is a large acid medium rock mass in the study area and its surrounding area,and it is inferred that the geological body caused by the residual gravity is low.The spatial form provides supportfor studying the metallogenic model of the region.According to the quartz test during the ore-forming period of the Dachang ore concentration area in Qinglong,Guizhou Province,the Rb-Sr isochron age is 94.3±5.9 Ma,indicating that the formation period of the strontium and gold deposits in the Qinglong Dachang ore district is Yanshan.period.According to the latest ore-forming fluid research,and the rare earth element geochemical characteristics of this rock ore sample,the ore-forming materials are mainly from the medium-acid magma deep in the mantle.According to the “long-distance-low-temperature hydrothermal type” of the gold-mining minerals in the ore-concentrating area,this paper selects the“intrusive rock-type minerals” mineral prediction method and establishes a large-scale model area.Through the binarization processing of MARS software,the continuous variable assignment is realized by manual input change interval,and the meaningful original data is extracted.The feature analysis method is used in MRAS software for location prediction.In the end,a total of five minimum prediction zones were delineated: the largest forecasting area of Dachang,the minimum forecasting area ofHeishanyu-Dipingping,the minimum forecasting area of rapeseed,the minimum forecasting area of ? ? Fangmaping,and the minimum forecasting area of the horse farm.