Sedimentary basin base uranium fertility and sandstone-type uranium deposit mineralization potentiality evaluation method

Abstract

The invention belongs to the technical field of uranium mines, and specifically discloses a sedimentary basin base uranium fertility and sandstone-type uranium deposit mineralization potentiality evaluation method. The method comprises the following steps: S1, comprehensively measuring aerial gamma energy spectra in a base provenance area; S2, collecting a medium acidic igneous rock sample in an aerial radioactivity measurement work area, and performing 80-mesh and 200-mesh pollution-free crushing on the sample; S3, measuring the quantity of ferrous oxide and major and minor components in the 200-mesh pollution-free powder; S4, measuring the share of active uranium in the 80-mesh pollution-free powder; S5, analyzing and arranging data about the content of uranium and thorium, the thorium-uranium ratio and the leaching rate of the active uranium; and S6, analyzing the base rock uranium fertility and evaluating the sandstone-type uranium deposit mineralization potentiality in combination with the data results of S1 and S4. The method is used for judging the uranium fertility of large sedimentary basin margin erosion source areas, and providing basis for large sedimentary basin sandstone-type uranium deposit mineralization potentiality evaluation.

Description

technical field [0001] The invention belongs to the technical field of uranium deposits, and in particular relates to a method for evaluating the mineralization potential of uranium-bearing and sandstone-type uranium deposits in the basement of sedimentary basins. Background technique [0002] Sandstone-type uranium deposits occupy a very important position in the structure of global uranium resources. They are also one of the four traditional industrial types of uranium deposits in my country, and their total potential resources also rank first among the four major industrial types of uranium deposits in my country. The research on the metallogenic regularity of sandstone-type uranium deposits must be implemented in the evaluation and prediction criteria of sandstone-type uranium deposits. For a certain research area or work area, the first question to be answered is whether there is any prospect of sandstone-type uranium deposits in this area? This is evaluation. If so, ...

AI Technical Summary

Problems solved by technology

[0003] So far, the formation, distribution and identification of sandstone-type uranium deposits have gone through the research history of "three major criteria" and "five major criteria", specifically involving "tectonic criteria, regional hydrogeological criteria, paleoclimate and modern climate Criterion, Lithology-Lithofacies Geochemistry Criterion, Hydrogeology Criterion, and Diagenetic Epigenesis Criterion”; most of the aforementioned evaluation criteria did not list the uranium source as the necessary mineralization conditions and evaluation criteria for sandstone-type uranium deposits , not to mention the quantitative standard and the share of active uranium

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