Structural Ore-Controlling Rules And Prognosis Of Concealed Ores In Luziyuan Pb-Zn Deposit,Zhenkang Town,Wester Yunnan

The lead-zinc deposit of LuZiyuan, lied in the southern section of "Sanjiang" metallogenic belt in Baoshan and Zhenkang lead-zinc polymetallic belt mineralization zone, was the most super-largely polymetallic deposit found in recent years. Based on the study of the regional metallogenic geological background, the thesis systematically analyzes different directions of the mining area, different natures of structurally mechanical properties with the instruction of the geologically mechanical ore field theory, and divides structural system and summarizes structural ore-controlling regularity. On the study of geochemical features in LuZiyuan lead-zinc deposit, the thesis also discusses the migration and the occurrence regularity of ore-forming elements in space. According to the above studies, we can mark out favorable metallogenic target areas.The thesis mainly has the following understanding:(1) Through the comprehensive analysis of the regional metallogenic geological conditions, geological characteristics, the ore-forming elements and ore-forming fluid, I think that it is a lead, zinc and iron polymetallic deposit, having multiple ore-forming stages and skarn type from various mineral in the (high) temperature.(2) The formation of the deposit is strictly controlled by strata and structure. The combination of different directions in four groups shows that the formation of ore deposit at least has experienced four periods of tectonic movement. The NE-trending fault, the main fracture in LuZiyuan lead-zinc deposit, dominates the whole ore deposits and ore bodies in space, having the function of conducting and hosting ore. The intersection of different fractures in mining area is beneficial to the precipitation and enrichment of ore-forming fluid because of rock breaking, especially the intersection from NE to nearly EW, where rich thick ore often exists.(3) By cluster analysis and R factor analysis of microelements of LuZiyuan lead-zinc deposit in different middle faults, it further illustrates the formation of this deposit strictly under control of the direction of NE-treading fault. The lead-zinc mineralization has multiple period stages. The metallogenic matter has "multi-sources" mainly coming from deep ore-forming fluid, partly from ore-bearing strata.(4) According to geochemical characteristics and main prospecting marks, we have delimited the mid-piece of1220,1265,1350. From now on, some target regions have the verification from the mine tunnel engineering, while other targets remains to be validated in the future.