Outlining method for in-situ leaching sandstone-type uranium-bearing basin favorable mineralization section

Abstract

The invention belongs to the field of sandstone-type uranium ore exploration, and specifically discloses an outlining method for an in-situ leaching sandstone-type uranium-bearing basin favorable mineralization section. The method comprises the steps: determining a research area, and selecting a target layer; collecting a land surface sample of a bottom plate of a basin edge target layer, a drilled coal stone sample or a carbon mudstone sample; collecting sandstone samples of the above samples at the same layer; carrying out the vitrinite reflectance measurement of the collected coal stone sample or the collected carbon mudstone sample, and calculating the maximum burial depth of an ore-containing target layer; selecting apatite minerals from the collected mudstone sample, carrying out the fission-track dating of apatite, and carrying out the inversion of the relation between temperature and time in construction evolution; verifying whether the above inversion result is matched with the actual condition or not: extracting the measurement result if the above inversion result is matched with the actual condition, or else checking whether the sampling is standard or not; drawing an erosion thickness contour map in the research area according to an erosion thickness calculation result, carrying out the research of restriction of construction uplift erosion on uranium mineralization, and outlining a favorable mineralization section. The method is clear in sampling object, is clear in analysis flow, and is simple in operation.

Description

technical field [0001] The invention belongs to the field of ore-forming prediction and prospecting of sandstone-type uranium deposits in uranium-bearing basins, and specifically relates to a method for delineating favorable ore-forming sections of in-situ leaching sandstone-type uranium-bearing basins. Background technique [0002] The formation of sandstone-type uranium deposits is a complicated process. Generally speaking, the mineralization of sandstone-type uranium deposits requires rich uranium sources, good mud-sand-mud strata structure, large-scale slope belts, and favorable groundwater replenishment-path-drainage systems, and a continuous flow of ore-bearing fluids is required. Take the uranium to a suitable place to enrich it into a mine. [0003] There are many methods for locating favorable ore-forming sections in in-situ leaching sandstone-type uranium-bearing basins. The single-factor analysis methods mainly include geophysical electromagnetic method, seismic ...

AI Technical Summary

Problems solved by technology

However, both geological methods and geophysical and geochemical exploration methods have their own limitations. For example, they cannot macroscopically combine the regional geological structure and thermal history to delineate favorable ore-forming sections vertically from the time dimension.

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