Application of fractal models to characterization of vertical distribution of Mo deposits in Henan Province

Characterization of the spatial distribution of elements of ore deposits have a guiding role to geological exploration and deep prospecting work. To fine describe the spatial distribution properties of metal elements in ore deposits and quantitative reveal deep concealed orebodies. In this paper, on the basis of the ore-forming mechanism and geological background and Mo values in 283 boreholes of Sandaozhuang, Nannihu and Shangfanggou molybdenum deposits, three fractal models including box counting method, power-law frequency model and R/S analysis were utilized respectively to comparative study the spatial distribution properties of Mo in boreholes of three ore deposits. The results obtained by the box counting method show that the box dimensions of mineralized boreholes are greater than that of Mo values in the non-mineralized boreholes, and the spatial distribution of Mo in three ore deposits exhibit self-similarity and complexity. The complexity of the vertical distribution of Mo values and the average values of Mo in boreholes from high to low is Sandaozhuang, Nannihu and Shangfanggou; The power-law frequency analysis reveals that the vertical distribution of Mo in 283 boreholes exhibit multifractal properties, and the fractal dimensions can be used as a parameters of quantitative description mineralization intensity and mineralization types, and provide proof to multistage mineralization and the superpose mineralization of the three ore deposits; The results of R/S analysis show that the vertical distribution of Mo in boreholes of the Sandaozhuang, southern area of the Nannihu and the Shangfanggou molybdenum deposit exist positive correlation, indicating that the homogeneous distribution of Mo and better continuity of mineralization in these zones and the deep of these zones have high probability of ore forming; the vertical distribution of Mo in boreholes of the west side of the Sandaozhuang molybdenum deposit, Northern area of the Nannihu molybdenum deposit- exist negative correlation, indicating that the heterogeneous distribution of Mo and worse continuity of mineralization in these zones and the deep of these zones have low probability of ore forming.