| In this paper, the regional metallogenic theory as a guide to learning than Lvchun East mine geological survey, the results of engineering geological prospecting and geochemical study of the catalog and other information, combined with the regional tectonic evolution, geological characteristics of the deposit and ore-controlling factors and the mineralization model similar comparative analysis of deposit, deposit metallogenic environment argumentation, metallogenic model, material sources summarize ore deposit characteristics, ore texture and structure characteristics and ore grade analysis, and to determine the extent and distribution of mineralization characteristics. By means of research, the main research results obtained with the following understanding:1.The mining area geological structure:the main tectonic fracture are nearly east-west, at the same time accompanied by the north west-south east rift and tectonic fracture zone between the layers, tectonic framework is relatively single. Among them, the main fault F1, F2, F3and F4faults.2.The spatial characteristics of the ore bodies:xi than east mining area the output of the main ore bodies controlled by structure, strata, magmatic rocks. According to mine tunnel on-the-spot investigation analysis, has found that there are two mineralized zone, located in the mining area, south of Fl fault F2fault, west of mineralized belt nearly east-west, tends to the south,25°to35°inclination, mineralized zone is mainly a layered-like layered output, the extension is larger, the thickness of20-40m, ore body around with strong silicification and pyritization, and exposed many bright spots dike, wall rock alteration are development, mainly include:silicification, sericitization, chloritization, pyritization and arsenopyrite mineralization, etc.3. Characteristics of mine ore:abundant plant species mining ore mineral, metal mineral components are pyrite, arsenopyrite, sphalerite, galena, pyrrhotite, argentite, white iron ore, natural gold and so on, metal sulfide mainly pyrite, followed by sphalerite, galena, pyrrhotite, argentite. The gangue minerals are mainly quartz, followed by chlorite, sericite, tourmaline, etc. Mainly has its type-half automorphic granular structure, residual structure, solid solution separation structure, metasomatic dissolution-residual structure, scattered disseminated structure, brecciated structure, dense disseminated-fine vein structure, net vein, ring structure.4.The deposit genetic types:xi depth than east mining area the formation of ore deposit is mainly between the surface and underground1km and1.5km, and the ore body and mineralized belt around lamprophyre is extremely development, through the analysis of the study found that closely related to the formation of ore bodies and lamprophyre, so the author thinks that learning is better than the east mine deposit type belongs to hypabyssal hydrothermal type deposit.5.The discussion of the relationship between orebody and lamprophyre and established a metallogenic model:lamprophyre and gold deposits in space symbiotic relationship is actually the result of deep fracture tectonic action. Lamprophyre is derived from the mantle is a product of deep fracture tectonic setting, and formed in the deep fracture tectonic activity area also happens to be favourable hydrothermal type gold deposits. Thus, the two are often close symbiosis in space. Is located in the ailaoshan fault in southern yunnan green spring acquisition than east gold polymetallic mine area is also so. The structure of the ailaoshan fault that make deep bright spot magma above invasion, but also provide a source of gold ore fluid channel, therefore, often found lamprophyre and gold are symbiotic. |
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