| The Taoshan uranium ore field is one of the important granite-type uranium orefields in southern of China.PingShang(6213)uranium deposits are produced in the middle of the TaoShan mountain.Taoshan mountain is located in the north of the Nanling tectonic zone.It's a multi-stage multi-stage complex rock.The deposit is located on the upper plate of the Taoshan fault zone,mainly in the early Yanshanian medium coarse grained biotite granite and granule dolomite granite.Tectonic and magma of Yanshanian activity is strong and ordinary,the deposit hydrothermal alteration development,mainly: hematitization,chloritization and so on.The paper mainly studied the occurence state of Uranium posits in the 6213 deposit of Taoshan,using methods of electron probe,Laser Raman,X-rad and polarizing microscope.The main gangue minerals of the uranium deposits are quartz,chlorite,mica,pyrite and so on.Alteration of minerals is related to mineralization.The main uranium minerals of PingShang deposit are Pitchblende,Brannerite and Coffinite.It is believed that the uranium minerals are mainly in the form of independent minerals,which exist in the gaps and fissures of the mineral and partly grow on the edge of other minerals.For example,Pitchblende is mainly veiny,disseminated growth in other gangue minerals such as(chlorite,rutile,etc.)cracks Uranium is mostly granular,disseminated.coffinite is the symbiosis between rutile,chlorite and apatite brannerite is mainly colloidal,fibrous.Others is small particles wrapped tightly in the apatite.The ore body is concentrated in the fault development area.The rock is broken and There are a lot of structure.These ore-bearing fissures were developed on the main fault of the Taoshan mountain,forming a large mineralization zone.However,The constructs of NNE And Other constructs is no deposit,It forms a mineralization zone with the structure of NEE.Therefore,Mineralization is controlled by fault.Mineralization has a certain relationship with medium-grained biotite granite.Alteration and construc,formed orebody enrichment zone.The wall rock alteration is closely related to uranium mineralization It Not only affects the activation and migration of uranium,but also has a significant impact on the final uranium mineralization.The deposit is more than a period of the consequence of multi-type alteration.Chlorite is mineral that studied deposit widely,chlorite can be used as a geothermal thermometer,and It can also be studying the formation of chlorite deposits and uranium deposits.The results show that the temperature of the deposit is 209 °,which belongs to the reduction environment,Uranium mineralization may be more closely related to argillaceous rocks.The formation of deposits is the result of multiple geological processes. |
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