An environmental index method for classifying post-genetic alteration of in situ leaching sandstone-type uranium ore rocks

Abstract

The invention relates to the technical field of mineral geological exploration, and specifically discloses an environmental index method for classifying the epigenetic alteration of in-situ leached sandstone-type uranium ore rocks. The method includes: 1. Setting rock environment index samples; 2. Carrying out field sampling; 3. Carrying out experimental analysis of the samples, and sending the samples to the laboratory in time after the sample sampling is completed, to measure the rock specific potential ΔEh, low price Sulfur S 2‑ Analysis and analysis of organic carbon Cy; 4. Analysis and utilization of experimental data. This method selects rock specific potential ΔEh, low-valent sulfur S 2‑ Combined judgment with the analysis data of three kinds of rock environment indicators such as organic carbon Cy can accurately judge the rock geochemical environment, determine the intensity of rock epigenetic alteration, and realize the zoning of the rock epigenetic alteration zone of in-situ leaching sandstone-type uranium deposits. Judgment and division, combined with quantitative gamma logging data, analysis of uranium content and uranium enrichment factors, to accurately capture the occurrence of uranium ore.

Description

technical field [0001] The invention belongs to the technical field of mineral geological exploration, and in particular relates to an environmental index method for classifying the epigenetic alteration of in-situ leaching sandstone type uranium ore rocks. Background technique [0002] In-situ leaching sandstone-type uranium ore has the advantages of easy economic mining and environmental protection, making it an important type of natural uranium supply market in the world, and has been widely valued by countries all over the world. The key to finding this type of uranium deposit is the rock geochemical environmental index (hereinafter referred to as "environmental index") classification technology for the strength and weakness of epigenetic alteration of in-situ leaching sandstone-type uranium deposits. Because through this technology, it is possible to quickly, accurately, practically and effectively delineate the ore-forming site—the front of the oxidation zone or the ox...

AI Technical Summary

Problems solved by technology

[0005] The color of sedimentary rocks is mainly controlled by the valence state and content of iron, as well as the form of existence. The oxidation-reduction properties of rocks can be evaluated by virtue of the color and valence iron content of rocks. The color of the core taken out of the core tube is quite different from the color of the core after dehydration. The reason is that when the core is exposed to the air, the surface of the ferrous iron minerals in the rock is easily oxidized, such as: pyrite and iron dolomite covering The upper layer of yellow-brown iron hydroxide and molybdenum sulfide is covered with a layer of blue film-like blue molybdenum, and the copper sulfide is covered with verdigris, etc. As a result, the analysis data cannot accurately reflect the real environment of the rock.