The Ore-Controlling Regularity And The Study Of The Orientation Of Minetal Prospecting Of Qiansunjia Gold Deposit

The northwest area of Jiaodong peninsula is the main gold industrial base of China. A great deal of geological research work have done in the area. There are many Linglong granite and Guojialing granodiorite here. By collecting and processing geochemical data of two types of granite, the geochemical characteristics of granite have been analyzed and compared this time, for example:main element characteristics, REE characteristics et. al.Qiansunjia gold deposit locates the south of Qiansunjia-Wasunjia fault zone, between Jiaojia fault zone and Lingbei fault zone. The quartz vein-type ore body and the structural altered rock type can be found in the gold deposit. It's metallotectonic location is rather special, at the same time the geological research work is very little, so hold a examination is necessary. By researching the characteristics of Qiansunjia gold geology, vein ore-controlling fractures, the features of rock alteration, combination of structures, we draw some basic understanding.The ore body of Qiansunjia gold deposit is controlled by the contact zone of granite mass, especially there is a close relationship with small phanerocryst Guojialing granodiorite. The ore body is mainly located in the ore-controlling faults, but the mineralization also can be found in the Guojialing Granodiorite of foot wall of the ore-controlling faults. The ore-controlling faults make up the grid-like shear structure system. The major faults and secondary faults control the concentration of ore body together, showing the feature of concentration in different section. The formation and distribution of ore body is dominated by potassium alteration and structure fault. But ore body of 9 mineral vein is very particular, the characteristics of potassium alteration and REE are obviously different from other rock, indicating a special formation mechanism. The 9 mineral vein have the distribution regularity of left-lateral sense and right column On the top 2 mineral vein is dominant, but in the lower 4 mineral vein is dominant. The mineralization of 4 mineral vein is best and it's side-pitching orientation is south west, so prospecting area will be better in the deep. The relationship of 2 mineral vein and 4 mineral vein fault is conjugate shear fault. The superimposed localization of ductile shear and ductile shear is the best place for mineralization, it is of great indicative significance for mineral prospecting. This time the metallogenic model of Orogenic gold deposit is established, which ore-bearing hydrothermal fluid of net-like ductile shear belt concentrate in the brittle fracture, and Qiansunjia gold deposit is located in the structure subsystem of the foot wall of net-like ductile shear belt -in the Qainsunjia-Wasunjia fault zone. The mineral prospecting of Qiansunjia gold deposit is optimistic,4 mineral vein,9 mineral vein, new 1 mineral vein are the main target.Through summing up the mineralization and occurrence regularity from Qiansunjia gold deposit, we hope that it is useful for pointing out the next step in the direction of prospecting work and resolving the actual production problem of mine, at the same time we can grasp the formation and concentration regularity of northwest, Jiaodong.