| This paper is based on the project of "Shannan uranium ore resources exploration in Le'an County,Jiangxi Province,"(No:200436009) of "The crisis of resources prospecting and mining project"Xiangshan uranium ore field in Jiangxi province,as one of the biggest volcanic-type uranium ore deposits in China,is the major domestics uranium mining recently.Although lots of research work have been done about this ore field before the 1980s last century,the mineralized alteration and ore-forming conditions in physics and chemistry are still poorly understanding for long time.Based on the collection and field observations,the results of the electronic probe and fluid inclusions in the research and analysis,and other means to identify the rock alteration and mineralization,as well as the type of this deposit.For these can enable effective and timely guidance of uranium ore field of mineral exploration,prospecting work so that more targeted to reduce blindness,and narrow the scope of work, improving the efficiency of exploration.The main achievements of this essay include as following:1.The Xiangshan uranium ore-field experienced three major large hydrothermal alteration process:before the mineralization to the albitzation metasomatism(albitzation alteration);mineralization to the fluorite-hydrom icatization alteration(acid alteration);and the latter part of siliceous alteration.Mineralization and alteration rock close relationship with uranium mineralization,pitting a band mineralization symmetrical distribution.We can get the concluded: albitzation alteration is the wide distribution of the signs prospecting constituency;calcium,magnesium explainthe existence of mineralization conditions merits of the evaluation index,and fluorite-hydrom icatization alteration is the emergence of Rich Ore occurrence of the environment based on the identification.2.The study of the fluid inclusions in Xiangshan uranium deposit prove:a uranium deposit fluid inclusions in the uniform temperature distribution in the range of 140～360℃.Peak distribution:Shazhou 200～260℃,Zou Jiashan 140～160℃,280 "-- 290℃,Hengjian 200～210℃,Nanpi 280～310℃,340～360℃;Deposits Depth: Shazhou 0.561～1.443 km,an average depth of 0.965 km:Zou Jiashan: 0.506～1.048 km,an average depth of 0.775 km;Nanpi 0.683～1.294 km, an average depth of 1.090 km;Hengjian 0.504～0.756 km,The average depth of 0.596 km;mineralization pressure(unit:10~5 Pa):Shazhou to 168.4 from 433.0,with an average of 289.4;Zou Jiashan to 151.8 from 314.5,with an average of 232.5;Nanpi to 204.8 from 388.1,with an average of 326.9; Hengjian For 151.3 to 226.9,with an average of 178.7.the mineralization solution average density is 0.93 g/cm~2. From the fluid inclusion of temperature,salinity,pressure and depth of mineralization can be seen broadly,the field of uranium ore deposits there is a zonal distribution of the characteristics,from the crater of the mountain broke out,the physical and chemical properties generally High into the trend.3.The fluid of Xiangshan uranium deposit com from:the hydrothermal of mineralization of Xiangshan uranium deposit are come from the a source of precipitation and water of the magma,and obviously has the "oxygen drift";speculate mineralization fluid C also may be the source of water of river and the magma.4.In Xiangshan uranium deposit,U mainly come from Zhen Dan-Cambrian rocks and the deep source of magma.Secondly,it may also come from the solidification of granite porphyry,Granitic porphyry,porphyry like granite and other rocks.
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