Study On Metallogenetic System Of Tonglushang Ore District Hubei

Tonglushan Fe,Cu,Au deposit is located in central part of the E-Dong ore concentration area of the Middle-Lower Yangtze River metallogenic belt, East China. Because of the characteristic of large reserve, high grade, many kinds of ores and large scale proved ore reserves occur, Tonglushan deposit has become the focus of domestic and foreign studies. After decades of large-scale development, most of the mining reserve resources appear inadequate crisis. Therefore, China Geological Survey carried out a series of crisis mines research and greatly developed in recent years. This paper is an important part of it. According to the study on previous materials in combination with the ore-prospecting practice by ourselves, we provide ample evidence for metallogenetic model of this ore deposit.It's described the system of space-time background and metallogenic evolution of ore-forming elements, the process of mineralization, forming a comprehensive summary of the product, combination of geophysical and geochemical characteristics of tectonic metallogenic system Tonglushan proposed a comprehensive geological model.Through research, the main results obtained are as follows:1, The magma rocks in Tonglushan area is the results of the under plating of mantle-derived magmas, is comprised of processes of the under plating of basaltic magma, contamination and fractional crystallization. The magma rocks is the resource of the metallogenic materials and fluids;2, The cooled- contract and low- pressure space, which occurred in contact belt between intermediate-acidic intrusive rocks and dolomite-marble, supplied the space and channels for metallogenic materials transportation and magma invasion.3, The supercritical fluid plays an important role in the mineralization of extract, migration and precipitation.4, This paper observes the mineralization periods from a new aesthetic aspect. including the supercritical fluid metallogenic period, criticality- transition iron formation period and fluid mixing copper formation period 3 stage.5, This paper from cooled- contract and low- pressure space point of view, explained the formation process of xenoliths mineralization period, and point out that there may be "sediment skarn" and "sediment skarn deposits" in this area.6, The geological characters and the metallogenic model of Tonglushan polymetallic deposit are introduced in the paper. And forecast the next prospecting ore field Tonglushan recommendations.