The Crystal Mineral Assemblage Of Iron Ore In Fluid And Mineralization Instruction Significance,jianshan Wuan,Hebei

Han xing region is China's important skarn type iron ore concentration area,and many people have done a lot of work to the area.Wuan region is an important part of han xing region.The iron ore of Yushiwa is a medium-sized skarn ore.The skarn model Emphasizes the contact metasomatism,but we find that the skarn model can't be used to jianshan area models,so we need to put forward a new model to explain the phenomenon.In recent years,studies have shown that fluid activity plays a role in the formation of ore deposit,dbecause the densityofpulp is difficult to abuse,so fluid will improve the ability on the rise of pulp.Accordingly,Sue ShangGuo and Tang zhong li(2010,2012)put forward the concept of "channel magmatic metallogenic system model.The theory is that the magma just as in the late magmatic evolution,thus can through the study of fluid in the rock crystal to understand the evolution of the pulp.Liquid crystal composition is refers to the direct combination of minerals from the fluid phase microtek,already in jinchuan deposit in gansu province has been a good explanation of the actual research.Jianshan in the north of Yushiwa iron mining area,andthe rock ore for diorite rock mass.The sampling position is in the east of YU shi wairon ore area.Through the main elements,trace elements,and combining with field survey and indoor microscopic analysis:1.We found that some crystals in rockaredirectly cry staled from the fluid phase.The fluid crystal combination of diorite rock mass:apatite-calcitealbitehornblende biotite-phlogopite-magnetite and hematite.The vein of diorite body fluid crystal combination:calcite-biotite-magnetite and hematite.Fluid crystal combination of limestone calcite:magnetite and hematite,these findings suggest the orebody in the process of migration is the presence of fluid.2.Apatite are fluorapatite indiorite rock mass,which relative LREE enrichment elements,and Eu,Nb,Sr,Ba,Ta show negative anomaly,U,Pb,Th show abnormal.The data of Yu shi wa have 2 sets of data in the ore and apatite trace characteristics show consistent,illustrates the Yu shi wairon ore deposit is closely related to formation of diorite magma.Apatite in F/Cl 10.85-55.07,conforms to the characteristics of the late magmatic,due to the apatite is volatile important carrying minerals F,Cl,OH,so the existence of apatite containing mineral melt-fluid flow can rise along weak tectonic belt and mineralization in the magma passage.3.We can divided magnetite intohigh silica(SiO₂>0.5%)and low silica(SiO₂<0.5%),and we found that a high content of Ti corresponds to the high content of Si magnetite,low Ti content corresponds to the low high content of Si magnetite,meaning high temperature is mainly produced highSimagnetite.In magnetite TiO2Al2O3-MgO style triangular diagram,high siliceous magnetite is closer to TiO2 and Al2O3 components and low siliceous magnetite near MgO style end,which show Ti,Al content decreased gradually with the evolution trend of the Mg content increased gradually.All Nb,Sr,Baof magnetite show negative anomaly,Th,Ta display is abnormal.Magnetite trace spider diagram and the REE diagram,according to the figure jianshan magnetite and Yu shi wamagnetite has certain homology.And from Yu shi wato jianshan,the particle size of magnetite the are from coarse to fine,and the kinds of minerals also gradually reduced.4.The phenomenon of hematite band composition and contact with calcite straight edge,and their geochemical characteristics,show that they are directly from fluid crystal.