| Zizou iron ore mine is in the Yangwu town,xinping county,yunnan province,where is 34 kilometres from the town which is one of the mining areas of Lu Kui mountain.For xinpingludian mining co.,ltd.and other companies to cooperate mining management.As a mine with a long history,Lu Kui mountain's mining degree is larger,and the mining method is transformed from open pit mining to tunnel mining.With the gradual decline of mining resources,The collage of land and resources engineering of Kunming university of science and technology was entrusted by xinpingludian mining co.,ltd.to undertake the reserve analysis of its own iron ore,and further carried out the follow-up deep prospecting projects,in order to provide a scientific basis for mining development and construction.I participated in this project with the project team leader,professor li bo,and based on this project,wrote my graduation thesis.In this paper,based on the metallogenic mechanism of Lu Kui Shan siderite are studied,mainly through the key elements of the sedimentary mineralization parsing,judging by isotope and formation s contrast ore-forming material sources,by polarized light microscopy for studying the sedimentary facies of surrounding rock,based on mineral for chemical analysis and electronic probe,to analyze the diagenetic minerals metallogenic process,systematic carding the modification of epigenesis and make full use of the law of the predecessors' summary and collection of data,to establish the metallogenic model of ore bodies,and draw the phase diagram.Through the study,the following conclusions are drawn:(1)Combined with the latest knowledge of stratigraphy,through the analysis of the formation and evolution of ore formation of reasoning,judging deposit before starting sedimentary period is about 1200 ma,rather than the previous 1600 ma,but just for mineral to make the 1600 ma inference should be transported before because it the terrigenous clastic,in the time of formation of the yunnan middle land,but the specific analysis of the metallogenic period we don't do.the transformation of siderite is the recrystallization caused by underground hot water,which is not affected by metamorphism.(2)The study on the sedimentary microfacies of dalongkou formation is a quantitative microscopic study on the basis of previous studies on the regional sedimentary facies.The histogram of the microfacies is obtained by observing the results of the biverruger model under the microscope of the sample flakes(3)The study of mineral relations reveals that the two types of ore have different tastes and different forms,and the composition is almost th e same.Through the observation under the microscope,it can also be seen that although the surrounding rocks were slightly metamorphic,no metamorphic minerals were observed in the minerals.It can be seen that the metamorphism had no effect on siderite,and the change of siderite was completely caused by recrystallization.(4)Ore bodies have undergone various processes from the beginning of sedimentation,and after sorting out different geological processes and establishing a horizontal relationship with time,they are divided into five different stages,forming a complete set of metallogenic model.(5)According to the classification of metallogenic stages,it can be known that the deposit has undergone sedimentation,transformation,epigenesis and remelting and recrystallization,so the type of deposit can be defined as sedimentary epigenetic transformation deposit. |
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