Geological Characteristics of the Gold and Multiple-Metal Mineralization Areas in the Deluwu Rock Body and Surroundings in Hezuo City,Gansu Province

Abstract:The gold and multiple-metal mineralization areas in the Dewulu rock body and surroundings lie in the western section of the Caledonian fold belt in the central Qinling Mountains.Mineral resources of this mine district include gold,antimony,copper,lead,and zinc.Mineralization types are mainly altered rock-type gold (Sb) mineralization type and skarn-type copper arsenic,copper-lead-zinc mineralization type.The occurrence distribution in space of all ore sites shows a characteristic of equal-interval,controlled by the nearly north-south trending fault and alteration zones.Products of mineralization and alteration include pyrite,electrical petrochemical,silicification,sericite,arsenopyrite-oriented,antimony mineralization,secondary alteration to limonite,and kaolin.In this paper,based on the metallogenic characteristics,distribution rule of deposits,ore-forming geological characteristics,and ore-controlling factors of this region,from aspects of the tectonic setting and regional tectonic activity,we study the mechanism of mineralization structures in the fracture-alteration zones and suggest the ore-search direction in the future.