Metallogenetic Rules And Prediction Of Guilaizhuang Gold Orefield In Pingyi County Of Shandong Province

Guilaizhuang gold orefield is the most potential by resource amount in westernShangdong. There are three deposit types: Guilaizhuang, Mofanggou and Zhuojiazhuang.by the studyes of typical deposits, the paper discusses the metallogenic mechanism. Fromthe viewpoint of mineral resources prediction, the arthor divided them into twometallogenic and prediction models: crytoexplosive breccia gold deposit and carbonategold deposit. The prediction is based on the characteristics of the typical gold deposits,extract the ore-forming information, establish prospecting marks, construct the forecastingmodel, and finally make the metallogenic assessment and check the reliability ofevaluation. The main achievements obtained are as follows.The arthor has Established two kinds of prediction models and predictive factorcombination. The predictive factor combination of crytoexplosive breccia gold deposit:①Tongshi igneous complex has close relationship with gold mineralization.②Theintersection of NNE、EW and NE faults is more favorable to the emplacement ofmineralized rock and existing of gold ore body.③The intrusive breccia or hiddenexplosive breccia pipe at the edge mineralized intrusion is the important symbol for golddeposit.④The high positive to the high negative abnormal area of the gravity andmagnetic in the transitional zone is the favourable prospecting area.⑤The closelyassociated with gold mineralization element geochemical anomalies are Au、Ag、Cu、Zn、Pb、As、Te, Te etc. The predictive factor combination of carbonate gold deposit:①Thecontact zones between the Cambrian, Ordovician carbonate with the invasion rock is thefavorable mineralization position.②The fractures, cracks in layer of different directionare the favorable channel of migration of gold fluid, the interlayer fracture zone is themain ore storage space.③The high positive to the high negative abnormal area of thegravity and magnetic in the transitional zone is the favourable prospecting area.④Particular combination of multi-element anomalies is the indication of prospecting,as As、Sb、Ag、Pb. Delineated eight minimum predicting target areas, including one A class, four Bclass, and three C class.Evaluating the amount of resources in minimum predicting target areas withgeological volume method, The total amount of resources predicted is XXXkg. Correctedthe ore coefficient with the comparability of the model areas and the minimum predictingtarget areas, and evaluated the reliability of the amount of resources.