Metallogenic Prediction At Depth In Jiaojia Gold Deposit, Shandong

Jiaojia Gold Deposit is located in the Zhaoyuan-Yexian gold belt in northwest Shandong Peninsula, which is bordered on the well-known Tancheng-Luzhong fault belt in the west. Gold mineralization was developed in the NNB- and NE-trending altered-fiactured zones. The alterations are characterized by K-feldsparization, pyretic-phyllic alteration, silicification, and carbonation.Based on the studies of the previous research results, the geological environment of the deposit is further analyzed, a zonal model developed, and enriched gold mineralization zone at depth interred.The geoslatistical results obtained show that the ranges of the three gold orebodies, No. I,II,and III, are successively decreased, indicating the mineralization continuity reduced; vertically, the three main orebodies present alternative changes in continuity.The fractal theory results calculated describes the vertical variation in gold mineralization, from which the extending at depth for the orebodies is inferredIt is predicted, with the gray GM (1,1) model, that the mineralization for both No. I and III is gradually intensified from shallow to the deep, and, although No. II gives the same character, its thickness trends to be reduced and it is weaker than the other two in mineralization intensity.