Environmental index method for dividing epigenetic alteration of in-situ leaching sandstone type uranium ore rock

Abstract

The invention relates to the technical field of mineral geological exploration and particularly discloses an environmental index method for dividing epigenetic alteration of in-situ leaching sandstonetype uranium ore rocks. The method comprises steps of 1, setting a rock environment index sample; 2, performing field on-site sampling; 3, carrying out experimental analysis on the sample, feeding the sample into a laboratory in time after sample sampling, and carrying out rock specific potential determination delta Eh, low-valence sulfur S2- analysis and organic carbon Cy analysis; and 4, analyzing, sorting and utilizing experimental data. The method is advantaged in that three kinds of rock environment index analysis data such as the rock specific potential delta Eh, low-valence sulfur S2-and organic carbon Cy which are slightly influenced by air are selected for combined judgment, the rock geochemical environment can be accurately judged, the rock epigenetic alteration intensity can be determined, zoning property of a rock epigenetic alteration zone of the in-situ leaching sandstone type uranium ore is researched, judged and divided, quantitative gamma logging data is combined, uranium-bearing property and uranium enrichment factors are analyzed, and the uranium ore occurrence position is accurately captured.

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 leached 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 oxi...

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.