ORE-CONTROLLING STRUCTURES IN PANGXIDONG Ag(Au) DEPOSIT, NORTHWEST GUANGDONG: Characteristics and regularities of structural control to rebodies

Metallogenetically,ore-controlling structure plays a role of ore-holding space.On the other hand,it is an important reason for the migrateion,concentration and precipitation of ore-forming material.For the purpose of metallogenetic prediction,however,prospectors pay more attention to ore-searching information or indicators,especially those macroscopical signs that can be simply and easily identified.The Pangxidong Ag(Au) deposit is a representative of its type in Northwest Guangdong Province.It is hosted in the altered rock of ore-controlling structure in the contact belt between Precambrian and Lower Paleaozoic compound gneiss and late Yanshanian granite.The orebodies are strictly restricted by the controlling structures in veins or lens.The variation of the forms and attributes of ore-controlling structures obviously affect the positioning of orebodies.The intersecting of differently oriented structures is the direct reason for the widened and thickened orebodies.