Analysis On The Ore-controlling Factors And The Geological Feature Of Shihu Gold Deposits In Hebei Province

Lying in Lingshou county,Shijiazhuang City,Hebei province, Shihu gold deposits is a large-scale one in this area, which is located in the contact zone of Beiye-Mapeng-Yangjiazhuang fracture and Mapeng rock mass, and controlled by the regional structures and Mapeng rock mass. Thus, there exist useful ore-forming conditions.Through the researches of regional mineralization geology background and deposit geological features ,the author emphatically studies the relations between mineralization and strata, structures or magamatites, explains the evolutional properties of the ore fields and structures, analyzes the origin of the ore-forming matters and fluids, presents the new origin viewpoints of the deposits, sets up the metallogenic model of the gold deposits, and summarizes the mineralization enrichmental regulations.On the basis of the above-mentioned studies, the following conclusions are drawn.(1)Shihu mining area has undergone three larger evolutional stages,that is Pregeosyncline, Platfoum and Diwa.(2)The origin of gold deposits in Shihu ore field is mainly controlled by the factors of strata, magamatites as well as structures.(3)The origin of the metallogenic matters comes from the Tuanbokou formation.(4)The origin of ore-forming fluids comes from the mixtures of the magmatic hydrothermal and stratigraphic or atmospheric fluids.(5)The type of Shihu gold ore deposits belongs to a polygenetic compound ore deposit, which is mainly controlled by the magmatic hydrothermal fluids and characterized by the multi-factors, the multi-origins and the multi-stages.