The Research Of Zhongjia Iron Ore Deposit Geological Characteristics And Enrichment Regularity Of Its Associated Elements Of Indium Cadmium In Longyan County,Fujian Province

Study area is located in the southeast of mainland China the brink of the Pacific tectonic-magmatic-ore belt,which is a part of Nanling polymetallic ore belt in eastern China.lt lies in the Central and Western Pacific continental margin of more complex parts of the metal part of the metallogenic belt.Located on the governance structure-Tai Po,North East regional deep fault zone to the southwest section of belt west, Minxi-Meizhou Pb-Zn-Cu-Fe metallogenic belt of polymetallic ore Longyan-Zhangping-iron ore concentrate with depression Yangshan basal area,north east of Ma Heng Mine,The exposed rocks in the area of continental clastic rocks→coastal,chert, carbonate rocks and volcanic clastic rocks clip construction,Which distributed in the North East band evening among the Paleozoic depression along the eastern depressions Longyan group JingShezu clastic-carbonate-the main area of volcanic rock into the construction of seam position.In this paper, deposit geology, genesis and dispersed elements indium cadmium accumulation in the main line for the study,To economic geology, mineralogy theory, in the field based on geological survey, collect data on the regional geological mineralization, geological conditions and its regional context summarized.Containing mainly on the mining seam position, wall-rock alteration and mineralization characteristics of the relationship between the relevant conditions of ore-controlling lithology, structure, magmatic ore-forming conditions and ore-controlling factors were studied.This paper argues that the formation of iron deposits in the Early Carboniferous era roughly woodland group in the Carboniferous to the mid-late,But the late hydrothermal deposits of polymetallic sulphides superimposed formed in the early Yanshan.ZhongJia iron ore deposits in the characteristics of a complex origin for the marine volcanic deposits-hydrothermal superimposed transformation type magnetite deposits of polymetallic sulphides.The mineralization of ZhongJia iron ore bed experience the original iron formation (Marine volcanic sedimentary period) and later hydrothermal reform period (skarns period and quartz sulfide phase). After the formation of rich iron, the acidity of magmatic hydrothermal and carbonate form massive skarns minerals and tin metal sulfide magnetite under the complex metasomatism in the early stage of yanshan movement. According to the combination of ore mineral characteristics, the ore natural type appears vertical zoning trend.So,it can beroughly divided into limonite ore (sedentary product, pay attention to zoning), magnetic hematite ore,garnet (galena) ore through sphalerite, diopside-garnet sphalerite (magnetite) ore, diopside-pomegranate with rich zinc magnetite ore,diopside rich in zinc magnetite ore, quartz magnetite ore,(lead-zinc) magnetic pyrite ore, chalcopyrite ore type ore, etc. But some ores lack of the ore types.The content of associated disperse element In, Cd in the orebody is higher. Its main enrichment conditions has a significant positive correlation to mineral stone and the enrichment of sphalerite. In and Cd,being in isomorphism, enrich in late light color of sphalerite under the formation of liquid superposition in low temperature.In the average,In and Cd ore quality score respectively is:In0.0076%,0.0276%, which both are more than ten times of In and Cd minimum industrial used index (In0.0005%,0.002%) or even fit the requests of symbiosis ore of industrial deposits.According to the grade ZhongJia roughly calculated,the disperse element of749.11million tons of iron ore mining reserves are respectively, indium569.32tons, cadmium2067.54tons, indium reach a large size (more than500tons of indium for large),and has potential economic value.Through the research of disperse element In, Cd In beneficiation process, In, Cd in the ore are rich in sphalerite fine ore powder with main sphalerite.In the average,the quality scoreln and Cd in zinc concentrate are respectively:In0.0485%,0.3205%.The mill Cd mine of ore mined with the three process,the flotation magnetic-re-election, which contains useful elements In Cd, can be efficiently synthesis recycling in this process. This provide the reference for future comprehensive recycling of In,Cd in ore mining area.In Min Xinan-meizhou,this type of deposits Pb-Zn-Cu-Fe metal sulfide ore beltin are rich. With the representative research, it fills the gap of disperse element, cadmium minerals and research. And provides theoretical basis for mining disperse element, cadmium comprehensive recovery of indium in the future. But also provides reference for the research of deposits associated and disperse element and the comprehensive recycling in MinXiNan.