Abstract:
The studies show that multitudinous vein rocks, mainly including intermediate-basic dikes, occurred in different ore deposits of Zhao-Ping Fault Belt. The gold mineralization is concord with intermediate-basic dike group for strike, and a part of the ore bodies are located on the contact zones between dike and wall rock, or occurred in dikes. The rare earth element geochemical characteristics of intermediate-basic dikes and ore are similar, which suggests that gold and vein rocks are of the same origin. The age of intermediate-basic dikes is from 110Ma to 130Ma, and the most time of the gold mineralization is 120Ma, which indicates the age of dikes-formation includes the gold ore-formation age, that is, the gold mineralization occurred during tectonic-magma evolution age of dike. There has to be the characteristic of temporal similarity, spatial harmonization and the same source of ore-forming material between gold mineralization and dikes, and the gold deposits result directly from the tectonic-magma evolution of medium-basic dike group in Zhao-Ping Fault Belt.