Study On Prediction Of Concealed Gold Deposits By Integrated Geoelectrochemical Technology In Yanyi Mining Area,Sichuan Province

The study area is located in the southern part of the Garze-Litang structural belt.The Garze-Litang metallogenic belt is an important gold metallogenic belt in China.Yanyi mining area is close to Soluogou large gold deposit.The mining area is a deep cutting of alpine meadow landform,and the effect of traditional geological prospecting is not good.In order to solve the problem of prospecting for concealed gold deposits in this area,a study on the prediction of concealed gold deposits by integrated geoelectrochemical technology in Yanyi mining area of Muli County,Sichuan Province has been carried out.In this paper,based on the geological metallogenic background,based on the exploration theory of geoelectrochemical integrated technology,and on the premise that the feasibility test in the known profile of Suoluogou gold deposit shows obvious ore effect,the ore prospecting work of geoelectrochemical integrated technology has been carried out in Yanyi mining area,and the results are as follows:(1)The feasibility study on the known profile of line 51 of Suoluogou gold deposit shows that the geoelectric extraction method,soil ionic conductivity measurement method and soil thermal release mercury measurement method are feasible and effective in searching for concealed gold deposits in alpine meadow landscape area.(2)Through the mathematical statistical processing of the element content of geoelectric extraction and measurement in Yanyi mining area,it is found that the abundance of gold elements in the study area is high and the ore-forming potential is great.Au element is the main ore-forming element in the study area,and other extracted elements and Au elements have a linear distribution trend.Other extracted elements can provide some indication information for searching for concealed gold deposits in this area.(3)The R-type factor analysis method was used to extract geoelectric elements,and four factors were obtained.Through the analysis of the element assemblage and regional element mineralization represented by the four factors,it is known that the main ore type in this area is gold deposit,and its metallogenic type is epithermal deposit.The degree of transformation in the later stage can be identified by the abnormal scale delineated by F₃ and F₄ factors.The eight elements extracted from geoelectricity can be divided into four kinds of element combinations:Cu-Zn-Hg,Au-Pb,As-Ag and Sb.(4)The data of geoelectric extraction of single element,combined element,soil thermal mercury release and soil ionic conductivity were processed and abnormal zoning was carried out to provide a basis for the point scoring mechanism of the ore-forming target area in the later stage.(5)Based on the multi-level fuzzy evaluation method,combined with the geological ore-forming conditions and the anomaly analysis characteristics of geoelectrochemical integrated technology in the study area,a four-level hierarchical structure of goal-criterion-factor-factor based on point research is constructed,and the point score is finally obtained.According to the point score,the target area of the study area is delineated,and four ore-forming targets are divided.According to the total score of the target area,the potential of the ore-forming target area is evaluated.It is suggested that the verification work order of the target area is as follows:target?(23.41)>target?(22.41)>target?(16.28)>target?(16.06).