The Study On Ectono-Geochemistry Of Luziyuan Lead-Zine Polymetallic Deposit

This paper takes the Luziyuan lead-zinc polymetallic deposit(LZYPD) in Yunnan as the research object and the genesis is discussed on the basis of the detailed summary and study on the regional metallogenic background and geological characteristics. The prospecting target areas are delimited on the basis of researching the ore-controlling structure properties and geochemical anomaly by the application of the theory and method of the tectono-geochemistry, then provides the guidance for further prospecting of this mining area. The main research results in this paper are as follows:(1)The results show that LZYPD is medium-high temperature skarn type deposit which is related to concealed intermediate-acid lithosome by the analysis of regional geological background, ore deposit geological characteristics, ore-forming material sources and ore-forming fluid.(2) The analysis results of the fracture structures and tectonic joints statistical in the mining area show that structures are the important metallogenic factors controlled the spatial distribution of ore bodies. The NE-trending fractures in the mining area are the main ore-controlling structures and have the characteristics of ore-transmitting and ore-hosting, which mainly experienced three periods of tectonic activities: compresso-shear, tenso-shear, extension.(3)Taconites associated with mesothermal hydrotherm on the level of1220m and1350m are similar in Pb and Zn ore-forming element assemblage by the analysis of the taconites trace elements in the mining area, which reflected partial ore-forming material from the deep hydrothermal.There is partial corresponding relationship between the high value areas of mineralization element factors and the known orebodies, which indicates the mineralization factors are the reflection of the primary haloes of the orebodies and provides an important basis for metallogenic prediction. The high value areas of main mineralization factor are obviously controlled by the fractures and mainly distributed between F2and F2-1, near F3, which show that the NE-trending structures are the channel of the hydrothermal.The high temperature mineralizing factor element assemblages in the tectonite trace factor elements show that the mineralization is associated with the deep hydrothermal.(4) According to the distribution characteristics of the orebodies and the main indicator of the ore-prospecting, Five key prospecting target areas are delimited in the mining area, three of ones on the level1220m and two on the level1350m. These work lay a foundation for the next exploration in the mining area.