The Ore Prospecting And Characteristic Of Uranium Deposits Jianchuan To Jianshui Area In South Section Of Kangdian Axis

The dissertation is supported by China National Nuclear Corporation project, studying"The uranium resources potential evaluation of Kangdian Axis"and"The depth portion drilling verification of 306 uranium in Jiangchuan of in South Section of Kangdian Axis"as a backing.In summarizes and analyzes the predecessor material thoroughly in the foundation, take has representative in Jiangchuan 306 uranium mine as the key object of study, which dissect uranium mineralization characteristic, ore-controlling factors, mineralization condition etc.,and establishes ore-forming model of the uranium mine in Jiangchuan area.Using"seek the rule to research the point, and seek with the point the similar mineralization geological environment on the surface investigates"the technical route, and proposed that before may supply to further do the work the prospecting. The author acquired some outcomes and recognitions:1. Studying detailedly the rock stratal texture and sedimentary facies characteristics of the Jiangchuan to Jianshui area, the author dividesd in 3 sections of Chengjiang group sandstone's, such as the first section take alluvial fan facies as the characteristic; the second section take delta-lacustrine facies as the characteristic; the third section take braided-meandering river facies as the characteristic.2. The uranium mine mineralization of Jiangchuan 306 hosted in the faulted structure belt as well as in the faulted structure belt side the second section of Chengjiang group mottled sandstone structure crevasse, which grow the low temperature hydrothermal alteration, such as silicalite, chloritization-hydromicatizatio-n, metal-sulfide, sericite, hematite etc. The main controlling factors of uranium mineralization is fault , next for Meso- to Neoproterozoic unconformity; the mineralization fluid possibly originates from under the basis rock and through fault incised the Meso- to Neoproterozoic unconformity.3. Confirmed after the uranium mine depth portion drilling verification of Jiangchuan 306, that 306 fault for many issue of activity faults, the eraly is extension fault, the later is reverse fault. In the fault zone has the hydrothermal activity center, by no means along the entire fault zone. Hydrothermal rise channel located at stope nearby fault zone curve inflation spot, thus forms the shape"mushroom"structure alteration belt. Uranium ore-body mainly hosted in cataclastic rock in fault and in motley sandstone, cataclastic sandstone, mudstone.4. Through the geological investigation of route on the surface and ground Gamma-Ray spectrometry, discovered that 2 with 306 uranium mine similar geology environment, and tectonic-alteration belt in the Tonghai, which have the uranium equivalent exceptionally to demonstrate;5. This paper summaries the characteristic of 306 uranium mine and Ore-controlling factors in Jiangchuan, and discussed its mineralization model. then has carried on the appraisal to the Jiangchuan to Jianshui area uranium mine resources potential. The authors considered, prospecting direction should be alteration belts of through fault incised the Meso- to Neoproterozoic unconformity next, concrete is:"One Point, One Area", namely 306 uranium mines of Jiangchuan County and Tonghai area.These achievements and views the author obtained brokethrough inland traditional theory on"The Stratum"and"The Unconformity", they possess extremely important directing significance for ore exploration and prediction in Jiangchuan to Jianshui area.