A method for locating favorable ore-forming lithofacies belts in sandstone-type uranium deposits

Abstract

The invention belongs to the technical field of sandstone-type uranium mine mineralization prediction, and relates to a sandstone-type uranium mine favorable mineralization lithofacies belt positioning method. The method includes the following steps that: step 1, regional geological data are collected, and a sandstone-type uranium mine uranium-prospecting key area and target horizon are determined; step 2, the sedimentary facies type and spatial distribution characteristics of the key area and the target horizon in the step 1 are sorted; and step 3, the sedimentary facies belt of favorable uranium mineralization is delineated qualitatively and quantitatively on the basis of a uranium-bearing stratum structure, sand body physical properties, lithological combinations, paleoclimate, oxidizing zone developmental conditions and uranium-bearing geological conditions.

Description

technical field [0001] The invention belongs to the technical field of metallogenic prediction of sandstone-type uranium deposits, and in particular relates to a positioning method for favorable ore-forming lithofacies belts of sandstone-type uranium deposits. Background technique [0002] Sandstone-type uranium deposits are the type of uranium deposits with the largest amount of uranium resources in my country, and are also an important type of industrial uranium mineralization in my country. With the increasing demand for uranium raw materials from the development of nuclear power and military industry in China, the exploration of sandstone-type uranium deposits has entered a comprehensive and rapid development. stage. For the exploration of sandstone-type uranium deposits in a certain working area, it is first necessary to clarify whether there are favorable ore-controlling factors for the development of sandstone-type uranium deposits in the area, and the lithofacies pale...

AI Technical Summary

Problems solved by technology

[0003] At present, the research on the location and identification of favorable ore-forming lithofacies belts of sandstone-type uranium deposits is very limited, and related research mainly focuses on the sedimentary facies characteristics of a single working area, such as Liu Jiaduo (Liu Jiaduo, Lin Shuangxing. Jurassic in the southern margin of Yili Basin Study on sedimentary microfacies and uranium ore-controlling conditions. Mineral Rock, 2003), Zhao Honggang (Zhao Honggang, Ou Guangxi. Sedimentary system and sandstone-type uranium mineralization in Dongsheng area, Ordos Basin. Uranium Geology, 2006), Luo Mei (Luo Mei, Zhao Jie. Sedimentary facies characteristics of the uranium-bearing layer in the northern Songliao Basin and its relationship with uranium mineralization. Abstracts of the Ninth Academic Annual Conference of the Chinese Society of Mineralogy, Petrology and Geochemistry, 2003), Fangshi (Fangshi, Yang Shanghai, Xu Laisheng et al. Analysis of lithofacies palaeogeography and sandstone-type uranium ore-forming conditions in Suhongtu Basin, Inner Mongolia. Abstracts of the 12th National Conference on Paleogeography and Sedimentology, 2012), etc., lack of comprehensive and systematic positioning of sandstone-type uranium deposits Method theory of favorable lithofacies belt for mineralization

[0004] In addition, most of the relevant research in the field of sandstone-type uranium deposits simply restores the sedimentary environment in the study area, and has not formed a complete set of methods based on lithofacies paleogeography to identify favorable lithofacies belts for uranium mineralization and then locate sandstone-type uranium deposits. The method system has a limited effect in the actual production practice process. In order to improve the success rate and accuracy of sandstone-type uranium deposit prediction and directly guide production, it is urgent to evaluate and study the favorable lithofacies conditions for mineralization. The ore and lithofacies belt is the main line, and the research method of multi-factor comprehensive quantitative evaluation method is tried to solve the above technical problems

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