The Application Of Fractal Method In Gold Deposit Evaluation And Prediction In Shandong Jiaodong Region

The essence of exploitation geochemistry data processing is the identification of the geochemistry background and geochemical anomaly and the anomalistic data processing aims at finding out geochemical information on ore from abundance of original data which were got in reconnaissance. For a long time, the threshold is confirmed on the assumption that the concentration of chemical elements in the crust follows a normal distribution or concentration of elements takes on a continuous change in space. However, the spatial distribution of geochemical elements is extremely complicated. Geochemical variables observed in the field of geochemical usually have the character of random variable and certain variable, but also have the structure of regional variables. Fractal geometry is an effective tool to depict irregular object. Fractal dimension can express the certain nature of irregular object. So fractal can be used to describe the regional geochemical variables, in order to reveal the randomness and the overall certainty. This paper uses fractal means to deal with geochemical data and fracture of Shandong province. At first, we use content-area means to obtain Au element threshold and draw the Au element concentration's anomalies distribution. Then compare with the gold mine distribution of Shandong province, we find the gold mines mostly distribute in the high anomalies area. Therefore, we can forecast the potential goldfield based on the anomalies distribution. We apply this method to other element, obtain their anomalies distribution. By comparing with the gold mine distribution of Shandong province, we can conclude the Au element have a close geochemical relationship with the Ag,As,Pb element, and have a little geochemical relationship with the Bi,Cd element. According to the geological theory, we use the linear structure of the region as a gold mineralization and gain favorable gold mining area combining with the Au element concentration's anomalies distribution. Regional prediction is composed of 11 region. The region 2, 8, 9, 10, 11 which have more known gold mine are major regional prediction. The region 1, 3, 6, 7 and fragmentary 4, 5 are new regional prediction. Fracture fractal dimension can direct deposit orientation and the mineral liquid movement. The more complex fracture, the greater scale, the higher fractal dimension, the stronger fractureactivity, so it is more helpful to the activation movement congregation for the mineand formation for the big and super big deposit.