: In south China"s most important sandstone-type uranium mineralization belt,west-ern Yunnan TengChong block group of Cenozoic basin, great progress has been made in Sa new survey. Especially in southern Longchuanjiang basin,drilling a new industrial ore b-odies, for the study of the metallogenic mechanism and provided the precious material ex-ploration prospecting direction.In view of the Western Yunnan Metallogenic belt special"te-ctonics--uranium-lithofacies--ore-forming", to trace uranium source area, rebuild superimposeed mineralization process, establishing ore-prospecting criteria and deposit exploitation an-d utilization has important significance, but rarely seen reports.STheStechnologySofSICP-MS,SE-MPASandShigh-resolutionSSEMSw-ereSappliedSinSthisSresearchStoSanalyzeStheSrockSofSmineralizatio-nSareaSinSTuantianSTownship.STheSa-nalyticSdataSshowSthatSCoffiniteSisStheSmainSuraniumSmineralSi-nSthisSarea,SwithSsomeSuraniumSbear-ingSmineralsS(horiteSandSmonazite)SexistingSinSthere.STheseSmi-neralsSareSexistingSinStheSformSofSmi-croSgrainSandSinfectionSstatusSinStheSinterstitialSmaterialSandSabsorbingSonStheSsurfaceSofSdetritalSmi-nerals.SASpartSofSmineralsSexistSinStheSfissureSofSalterationSbio-titeSan-dSquartzSgranuleSinStheSformSo-fSuraniumSparticleSassembly.STheSimagesSofSareaSscanningSsh-owStha-tStheSdistributionScharacteristic-cSofSuraniumSelementShasSpositivelyScorrelationSwithSthoriummSandSYttriumSelementSinStheSmineraliz-ationSarea. It indicates theSsandstone type uranium d-eposit inSTuantian Longchuanjiang Basin,that Th, rare earth element Y content may have hi-gher background value, to recover the provenance has a certain instruction significance. T-he supply of uranium source in Longchuanjiang Basin may haveSmultipleSsourcesSandSmultip-le phase.