Synthetic Metallogenic Prognosis Of Au Deposit On Dong’an-Tangwanghe Region, Heilongjiang

Dongan-Tangwanghe Region located in Xiaoxing’anling ore district is a hotresearch area about epithermal deposite in China. Since last century,23gold depositsinclude Tuanjiegou gold deposit, Zhangsangou gold deposit, Gaosongshan golddeposit and Pingdingshan gold deposit have been found in this region. Differentscholars have studied this area from different directions such as metallogenicgeological background, ore-controlling structure, ore control rock, genesis of thedeposit, mineralization age and so on. However, it is hard to do geological work forlarge area of forest. Therefore, on the basis of previous studies, it has obvioussignificance to strengthen the study of regional geophysical, geochemical, remotesensing information and typical deposits for both epithermal metallogenic system andprospecting prediction in this area.The analytic result of stream sediments show systematic and regular elementdistributions. Anomalies of low-temperature elements and high-temperature elementsoccur in the western and eastern parts of the study area, respectively.The eastern areahas substantial potential for exploring Au deposits associated with middle-tolow-temperature elements, and this paper delineates33element anomaly associations.Combing edge detection of gravity and magnetic and linear ring structure of remotesensing, the faults of this area have been divided into3grades. Among all these faults,F1-F4fractures plays an important role in distribution of main rock and volcano rockstrata of this area. Though Principal component analysis, this paper extractsinformation of hydroxyl anomalies anomaly and iron staining anomaly. Combing theinformation of geology, geophysics and known deposits, this paper delineates4potential prospecting areas preliminary, and summarizes the prospecting features ofthese areas.Gaosongshan gold deposit occurs in the board room of Lower Cretaceous, andhas been controlled by faults. The deposit is made up of4ore bodies. Totally, thisdeposit has feature of Epithermal deposit. The prospecting feature of Gaosongshan gold deposit is to locate the area which have flat magnetic anomalies,Au-Ag-Sb-As-Bi element anomaly associations and hydroxyl anomalies. Under GISplatform, Combing all kind of datum, this paper has forecasted the most importantdirection for prospecting is the north of F1.The ore-forming mother rock of Tuanjiegou gold deposit is Mesozoic granites.The deposite is controlled by structure. Totally, this deposit has feature of Porphyrydeposit.Through calculation with method of finite element on electric prospecting, thegeoelectric model of this deposite has condition to distinguish the boundary ofNingyuancun group’ volcano rock strata, granite porphyry, schist layer and alterationzones which are nearby border of the granite porphyry. With this method, this paperhas extracted information of15th and23th exploratory line of periphery. And23thexploratory line has potential value.As the goal of23known deposite, through Bp, this paper have established allkind of evidence factor models, and acquired a group of weight. With this group ofweight, this paer have drew the probability map of prospecting, and delineates6potential prospecting areas.