Method for determining uranium metallogenic area of area to be surveyed

Abstract

The embodiment of the invention relates to the field of testing or analyzing materials by means of measuring chemical or physical properties of materials, in particular to a method for determining a uranium metallogenic area of a to-be-surveyed area, which comprises the following steps: acquiring soil radon gas data of the to-be-surveyed area; according to the soil radon gas data, determining a first uranium metallogenic favorable area of the to-be-surveyed area; according to the first uranium metallogenic favorable area, the positions of a plurality of drill holes are determined; acquiring a plurality of sandstone samples of the plurality of drill holes at a plurality of heights; determining the contents of montmorillonite and kaolinite in the plurality of sandstone samples; determining a second uranium metallogenic favorable area of the to-be-surveyed area according to the montmorillonite and kaolinite contents in the plurality of sandstone samples and the first uranium metallogenic favorable area; and determining the uranium metallogenic area of the area to be surveyed according to the contents of montmorillonite and kaolinite in the plurality of sandstone samples and the second uranium metallogenic favorable area. According to the method provided by the embodiment of the invention, the efficiency and accuracy of determining the uranium metallogenic area of the area to be surveyed can be improved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of testing or analyzing materials by means of determining chemical or physical properties of the materials, and in particular to a method for determining a uranium ore-forming area of a to-be-prospected area. BACKGROUND

[0002] The statements herein are merely provided to give a basic understanding of the present application and are not necessarily intended to constitute the prior art.

[0003] With the increasing global population and the advancement of industrialization, the demand for electricity and energy resources continues to rise. Nuclear energy, as a clean and efficient energy source, has attracted widespread attention because it not only reduces greenhouse gas emissions and helps mitigate the adverse effects of climate change, but also meets the growing demand for electricity.

[0004] Uranium resources are the basis for supporting nuclear energy. However, as uranium resources are continuously consumed, traditional uranium resources are decreasing. In order to ensure the normal supply of uranium resources, new uranium ore-forming areas need to be found to meet future demand.

[0005] However, the current technology for finding new uranium ore-forming areas still has many limitations. SUMMARY

[0006] In the following, a brief overview of the present application is given in order to provide a basic understanding of some aspects of the present application. It is to be understood that this overview is not a comprehensive overview of the present application. It is not intended to identify key or important parts of the present application nor is it intended to limit the scope of the present application. Its purpose is merely to present some concepts in a simplified form as a prelude to the more detailed description of a later discussion.

[0007] In view of the above problems, embodiments of the present application provide a method for determining a uranium ore-forming area of a to-be-prospected area.

[0008] The method comprises the following steps: S10, obtaining soil radon data of the to-be-prospected area; S20, determining a first uranium ore-forming favorable area of the to-be-prospected area according to the soil radon data; S30, determining positions of a plurality of drill holes according to the first uranium ore-forming favorable area; S40, obtaining a plurality of sandstone samples at a plurality of heights of the plurality of drill holes; S50, determining contents of montmorillonite and kaolinite in the plurality of sandstone samples obtained in the step S40; S60, determining a second uranium ore-forming favorable area of the to-be-prospected area according to the contents of montmorillonite and kaolinite in the plurality of sandstone samples determined in the step S50 and the first uranium ore-forming favorable area determined in the step S20; and S70, determining the uranium ore-forming area of the to-be-prospected area according to the contents of montmorillonite and kaolinite in the plurality of sandstone samples determined in the step S50 and the second uranium ore-forming favorable area determined in the step S60.

[0009] The method provided by the embodiment of the present application is used to obtain soil radon data, determine a first uranium mineralization favorable area according to the soil radon data, convert the survey of the whole area to be surveyed into the survey of the first uranium mineralization favorable area, and improve the efficiency of determining the uranium mineralization area; and the content of montmorillonite and kaolinite in a plurality of sandstone samples is determined, a second uranium mineralization favorable area is determined according to the content of montmorillonite and kaolinite in the plurality of sandstone samples and the first uranium mineralization favorable area, and then the uranium mineralization area of the area to be surveyed is determined according to the second uranium mineralization favorable area, so that the area to be surveyed can be gradually reduced, and the efficiency and accuracy of determining the uranium mineralization area of the area to be surveyed can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0010] Other objects and advantages of the present application will be readily understood and appreciated when the following description is read in conjunction with the accompanying drawings.

[0011] Figure 1 is a flowchart of the method provided by the embodiment of the present application.

[0012] Figure 2 is a schematic diagram of the uranium mineralization area of the area to be surveyed determined according to the method provided by the embodiment of the present application.

[0013] REFERENCE SIGNS:

[0014] 21, uranium mineralization area.

[0015] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner so as not to obscure the concept of the present application. DETAILED DESCRIPTION

[0016] In the following, exemplary embodiments of the present application will be described with reference to the drawings. In the description, not all features of the actual embodiments are described in order to make the description clear and brief. However, it should be appreciated that many embodiment-specific decisions must be made in the process of developing any such actual embodiment in order to achieve the specific goals of the developer, such as compliance with system- and business-related constraints, which can vary from one embodiment to another. In addition, it should be appreciated that, although the development effort can be very complex and time-consuming, it is merely a routine task for those skilled in the art who benefit from the contents of the present application.

[0017] It should also be noted that, in order to avoid obscuring the present application with unnecessary details, only the device structures and / or processing steps closely related to the scheme according to the present application are shown in the drawings, and other details not closely related to the present application are omitted.

[0018] In the related art, the soil radon data in the to-be-surveyed area or the distribution of a single mineral component in the to-be-surveyed area is used to determine the uranium mineralization area of the to-be-surveyed area, but there is a problem of low efficiency and poor accuracy in determining the uranium mineralization area of the to-be-surveyed area.

[0019] To solve the above problems, the embodiments of the present application provide a method for determining a uranium mineralization area of a to-be-surveyed area.

[0020] Reference is made to Figure 1 , Figure 1 is a flowchart of the method provided by the embodiments of the present application. The method can include the following steps: S10, obtaining soil radon data of a to-be-surveyed area; S20, determining a first uranium mineralization favorable area of the to-be-surveyed area according to the soil radon data; S30, determining positions of a plurality of drill holes according to the first uranium mineralization favorable area; S40, obtaining a plurality of sandstone samples of the plurality of drill holes at a plurality of heights; S50, determining the content of montmorillonite and kaolinite in the plurality of sandstone samples obtained in the step S40; S60, determining a second uranium mineralization favorable area of the to-be-surveyed area according to the content of montmorillonite and kaolinite in the plurality of sandstone samples determined in the step S50 and the first uranium mineralization favorable area determined in the step S20; and S70, determining a uranium mineralization area of the to-be-surveyed area according to the content of montmorillonite and kaolinite in the plurality of sandstone samples determined in the step S50 and the second uranium mineralization favorable area determined in the step S60.

[0021] The method provided by the embodiments of the present application obtains the soil radon data, determines the first uranium mineralization favorable area according to the soil radon data, converts the survey of the entire to-be-surveyed area into the survey of the first uranium mineralization favorable area, and thus improves the efficiency of determining the uranium mineralization area. In addition, the content of montmorillonite and kaolinite in the plurality of sandstone samples is determined, the second uranium mineralization favorable area is determined according to the content of montmorillonite and kaolinite in the plurality of sandstone samples and the first uranium mineralization favorable area, and then the uranium mineralization area of the to-be-surveyed area is determined according to the second uranium mineralization favorable area, so that the area to be surveyed can be gradually reduced, and thus the efficiency and accuracy of determining the uranium mineralization area of the to-be-surveyed area can be improved.

[0022] In some embodiments, in the step S10, the soil radon data of the to-be-surveyed area can be obtained by carrying out soil radon measurement in the to-be-surveyed area. Specifically, a plurality of radon measurement points can be selected in the to-be-surveyed area, and the radon data of the plurality of radon measurement points is measured to obtain the soil radon data.

[0023] In some embodiments, in the step S20, the following steps can also be included: S21, determining the mean and standard deviation of the soil radon data according to the soil radon data; S22, determining the outlier of the soil radon data according to the mean and standard deviation of the soil radon data; S23, determining the region in the to-be-surveyed area where the soil radon data is greater than the outlier determined in the step S22, i.e., the first uranium mineralization favorable region. Since radon is usually gathered in the uranium mineralization region, resulting in a higher radon concentration in the uranium mineralization region, therefore, by the above steps, the embodiments of the present application can limit the uranium mineralization region to the first uranium mineralization favorable region, so that only the first uranium mineralization favorable region needs to be surveyed subsequently, which reduces the difficulty of determining the uranium mineralization region and improves the efficiency and accuracy of determining the uranium mineralization region.

[0024] Specifically, the soil radon data and the mean of the soil radon data satisfy the following relationship

[0025]

[0026] In the formula, μ is the mean of the soil radon data, C i is the radon data measured by the i-th radon measuring point, and n is the number of radon measuring points; the standard deviation of the soil radon data, the mean of the soil radon data, and the soil radon data satisfy the following relationship

[0027]

[0028] In the formula, σ is the standard deviation of the soil radon data.

[0029] In some embodiments, in the step S22, the outlier of the soil radon data, the mean of the soil radon data, and the standard deviation of the soil radon data satisfy the following relationship

[0030] C MAX = μ + 2σ,

[0031] In the formula, C MAX is the outlier of the soil radon data.

[0032] In some embodiments, in the step S23, the following steps can be included: S231, determining the soil radon data contour map according to the soil radon data; S232, determining the contour line greater than the outlier of the soil radon data according to the outlier of the soil radon data determined in the step S22 and the soil radon data contour map determined in the step S231, and the region enclosed by the above contour line is the first uranium mineralization favorable region.

[0033] In some embodiments, in the step S60, the following steps can also be included: S61, determining a high content area of montmorillonite in the to-be-prospected area according to the content of montmorillonite in the plurality of sandstone samples determined in the step S50; S62, determining a low content area of kaolinite in the to-be-prospected area according to the content of kaolinite in the plurality of sandstone samples determined in the step S50; S63, determining a region that is located in the first uranium mineralization favorable region, the high content area of montmorillonite determined in the step S61, and the low content area of kaolinite determined in the step S62, as a second uranium mineralization favorable region. Since montmorillonite and kaolinite are key minerals of sandstone type uranium deposits, and their contents are closely related to uranium mineralization regions, in the embodiments of the present application, by determining the content of montmorillonite and the content of kaolinite, the first uranium mineralization favorable region is further narrowed down to the second uranium mineralization favorable region according to the content of montmorillonite and the content of kaolinite, so that subsequent prospecting is only needed to be performed on the second uranium mineralization favorable region, which further reduces the difficulty of determining the uranium mineralization region and further improves the efficiency and accuracy of determining the uranium mineralization region.

[0034] In some embodiments, in the step S70, the following steps can also be included: S71, determining a ratio of the content of montmorillonite to the content of kaolinite in the second uranium mineralization favorable region according to the content of montmorillonite and the content of kaolinite in the plurality of sandstone samples determined in the step S50; S72, determining a preset ratio of the content of montmorillonite to the content of kaolinite in the uranium mineralization region; S73, determining a region in which the ratio of the content of montmorillonite to the content of kaolinite in the second uranium mineralization favorable region is greater than the preset ratio as the uranium mineralization region of the to-be-prospected area according to the ratio determined in the step S71 and the preset ratio determined in the step S72.

[0035] In such embodiments, by determining the ratio of the content of montmorillonite to the content of kaolinite in the plurality of sandstone samples, the second uranium mineralization favorable region can be further narrowed down according to the ratio of the content of montmorillonite to the content of kaolinite, so that the accuracy of the determined uranium mineralization region can be improved.

[0036] In the step S72, the preset ratio can be 2.5.

[0037] In some embodiments, in the step S61, the following steps can also be included: S611, correcting the montmorillonite content in the plurality of sandstone samples determined in the step S50 to obtain the corrected montmorillonite content in the plurality of sandstone samples; and S612, determining the high-content area of the montmorillonite in the area to be surveyed according to the corrected montmorillonite content in the plurality of sandstone samples. In such embodiments, by correcting the montmorillonite content in the plurality of sandstone samples determined in the step S50, the influence of abnormal data on the determination of the high-content area of the montmorillonite can be avoided, and the accuracy of the determined high-content area of the montmorillonite can be ensured.

[0038] In some embodiments, in the step S611, the following steps can also be included: S6111, determining the average value of the montmorillonite content in the plurality of sandstone samples according to the montmorillonite content in the plurality of sandstone samples determined in the step S50; S6112, determining the standard deviation of the montmorillonite content in the plurality of sandstone samples according to the montmorillonite content in the plurality of sandstone samples determined in the step S50 and the average value determined in the step S6111; and S6113, removing the abnormal data from the montmorillonite content in the plurality of sandstone samples determined in the step S40 to obtain the corrected montmorillonite content in the plurality of sandstone samples according to the average value determined in the step S6111 and the standard deviation determined in the step S6112. In such embodiments, by correcting the montmorillonite content in the plurality of sandstone samples determined in the step S50 through the above steps to remove the abnormal data, both the influence of abnormal data on the determination of the high-content area of the montmorillonite and the quantity of the montmorillonite content can be reduced, and the difficulty of subsequent operations can be reduced.

[0039] Specifically, the montmorillonite content in the plurality of sandstone samples and the average value of the montmorillonite content in the plurality of sandstone samples satisfy the following relationship

[0040]

[0041] In the formula, μ1 is the average value of the montmorillonite content in the plurality of sandstone samples, A i is the montmorillonite content in the i-th sandstone sample, and m is the number of sandstone samples; the montmorillonite content in the plurality of sandstone samples, the average value of the montmorillonite content in the plurality of sandstone samples, and the standard deviation of the montmorillonite content in the plurality of sandstone samples satisfy the following relationship

[0042]

[0043] In the formula, σ1 is the standard deviation of the montmorillonite content in the plurality of sandstone samples.

[0044] In some embodiments, in the step S6113, the abnormal data in the montmorillonite content in the plurality of sandstone samples can be data with abnormally high montmorillonite content or data with abnormally low montmorillonite content.

[0045] In some embodiments, in the step S6113, the method can further include: determining a preset value of an abnormally high value of the content of smectite in the plurality of sandstone samples and a preset value of an abnormally low value of the content of smectite in the plurality of sandstone samples according to the average value determined in the step S6111 and the standard deviation determined in the step S6112; and removing data of the content of smectite in the plurality of sandstone samples greater than the preset value of the abnormally high value and data of the content of smectite in the plurality of sandstone samples less than the preset value of the abnormally low value according to the preset value of the abnormally high value and the preset value of the abnormally low value, so as to remove abnormal data. Specifically, the preset value of the abnormally high value of the content of smectite in the plurality of sandstone samples, the average value determined in the step S6111 and the standard deviation determined in the step S6112 satisfy the following relationship

[0046] Z 11 = μ1+ 3σ1,

[0047] In the formula, Z 11 is the preset value of the abnormally high value of the content of smectite in the plurality of sandstone samples; the preset value of the abnormally low value of the content of smectite in the plurality of sandstone samples, the average value determined in the step S6111 and the standard deviation determined in the step S6112 satisfy the following relationship

[0048] Z 12 = μ1- 3σ1,

[0049] In the formula, Z 12 is the preset value of the abnormally low value of the content of smectite in the plurality of sandstone samples.

[0050] In some embodiments, in the step S612, the method can further include the following steps: S6121, determining the average value of the content of smectite of each borehole according to the content of smectite in the plurality of sandstone samples after the correction; S6122, determining the contour map of the content of smectite in the area to be surveyed according to the average value of the content of smectite of each borehole; S6123, determining a preset value of the high content area of smectite; and S6124, determining the area in the contour map of the content of smectite in the area to be surveyed where the content of smectite is greater than the preset value determined in the step S6123 according to the contour map of the content of smectite in the area to be surveyed and the preset value determined in the step S6123, and the area is the high content area of smectite in the area to be surveyed. In such embodiments, by determining the contour map of the content of smectite in the area to be surveyed and the preset value of the high content area of smectite, the high content area of smectite in the area to be surveyed can be determined intuitively and accurately, which is conducive to reducing the difficulty of determining the high content area of smectite in the area to be surveyed and improving the efficiency of determining the high content area of smectite in the area to be surveyed.

[0051] In some embodiments, in the step S6123, the preset value of the high content area of montmorillonite can be determined according to the mean value and the standard deviation of the content of montmorillonite in the plurality of sandstone samples. Specifically, the preset value of the high content area of montmorillonite, the mean value of the content of montmorillonite in the plurality of sandstone samples, and the standard deviation of the content of montmorillonite in the plurality of sandstone samples satisfy the following relationship

[0052] Y1 = u1 + d1,

[0053] In the formula, Y1 is the preset value of the high content area of montmorillonite, u1 is the mean value of the content of montmorillonite in the plurality of sandstone samples, and d1 is the standard deviation of the content of montmorillonite in the plurality of sandstone samples.

[0054] In some embodiments, in the step S6122, the interval between the contour lines of the content of montmorillonite in the area to be surveyed determined in the step S6122 can be set to 5 wt.% so as to facilitate the determination of the low content area of montmorillonite.

[0055] In some embodiments, in the step S62, the following steps can be further included: S621, correcting the content of kaolinite in the plurality of sandstone samples determined in the step S50 to obtain the corrected content of kaolinite in the plurality of sandstone samples; and S622, determining the low content area of kaolinite in the area to be surveyed according to the corrected content of kaolinite in the plurality of sandstone samples. In such embodiments, by correcting the content of kaolinite in the plurality of sandstone samples determined in the step S50, the influence of abnormal data on the determination of the low content area of kaolinite can be avoided, and the accuracy of the determined low content area of kaolinite can be ensured.

[0056] In some embodiments, in the step S621, the following steps can be further included: S6211, determining the mean value of the content of kaolinite in the plurality of sandstone samples according to the content of kaolinite in the plurality of sandstone samples determined in the step S50; S6212, determining the standard deviation of the content of kaolinite in the plurality of sandstone samples according to the content of kaolinite in the plurality of sandstone samples determined in the step S50 and the mean value determined in the step S6211; and S6213, removing abnormal data from the content of kaolinite in the plurality of sandstone samples determined in the step S50 according to the mean value determined in the step S6211 and the standard deviation determined in the step S6212 to obtain the corrected content of kaolinite in the plurality of sandstone samples. In such embodiments, by correcting the content of kaolinite in the plurality of sandstone samples determined in the step S50 through the above steps to remove abnormal data, both the influence of abnormal data on the determination of the low content area of kaolinite and the quantity of the content of kaolinite can be reduced, and the difficulty of subsequent operations can be reduced.

[0057] Specifically, the content of kaolinite in the plurality of sandstone samples and the mean value of the content of kaolinite in the plurality of sandstone samples satisfy the following relationship

[0058]

[0059] In the formula, μ2 is the average value of the content of kaolinite in the plurality of sandstone samples, B i is the content of kaolinite in the i-th sandstone sample; the content of kaolinite in the plurality of sandstone samples, the average value of the content of kaolinite in the plurality of sandstone samples, and the standard deviation of the content of kaolinite in the plurality of sandstone samples satisfy the following relationship

[0060]

[0061] In the formula, σ2 is the standard deviation of the content of kaolinite in the plurality of sandstone samples.

[0062] In some embodiments, in the step S6213, the abnormal data in the content of kaolinite in the plurality of sandstone samples can be data with abnormally high content of kaolinite or data with abnormally low content of kaolinite.

[0063] In some embodiments, in the step S6213, the following can also be included: according to the average value determined in the step S6211 and the standard deviation determined in the step S6212, determining a preset value of the abnormally high value of the content of kaolinite in the plurality of sandstone samples and a preset value of the abnormally low value of the content of kaolinite in the plurality of sandstone samples; and according to the determined preset value of the abnormally high value and the preset value of the abnormally low value, eliminating the data of the content of kaolinite in the plurality of sandstone samples greater than the preset value of the abnormally high value and eliminating the data of the content of kaolinite in the plurality of sandstone samples lower than the preset value of the abnormally low value, to achieve the elimination of abnormal data. Specifically, the preset value of the abnormally high value of the content of kaolinite in the plurality of sandstone samples, the average value determined in the step S6211, and the standard deviation determined in the step S6212 satisfy the following relationship

[0064] Z 21 = μ2+ 3σ2,

[0065] In the formula, Z 21 is the preset value of the abnormally high value of the content of kaolinite in the plurality of sandstone samples; the preset value of the abnormally low value of the content of kaolinite in the plurality of sandstone samples, the average value determined in the step S6211, and the standard deviation determined in the step S6212 satisfy the following relationship

[0066] Z 22 = μ2- 3σ2,

[0067] In the formula, Z 22 is the preset value of the abnormally low value of the content of kaolinite in the plurality of sandstone samples.

[0068] In some embodiments, in the step S622, the following steps can also be included: S6221, determining the average of the kaolinite content of each borehole according to the kaolinite content of the modified plurality of sandstone samples; S6222, determining the kaolinite content contour map in the area to be surveyed according to the average of the kaolinite content of each borehole; S6223, determining the preset value of the low content area of kaolinite; S6224, determining the area in the kaolinite content contour map in the area to be surveyed where the kaolinite content is less than the preset value determined in S6223, which is the low content area of kaolinite in the area to be surveyed. In such embodiments, by determining the kaolinite content contour map in the area to be surveyed and the preset value of the low content area of kaolinite, the low content area of kaolinite in the area to be surveyed can be determined intuitively and accurately, which is conducive to reducing the difficulty of determining the low content area of kaolinite in the area to be surveyed and improving the efficiency of determining the low content area of kaolinite in the area to be surveyed.

[0069] In some embodiments, in the step S6223, the preset value of the low content area of kaolinite can be determined according to the average and the standard deviation of the kaolinite content of the plurality of sandstone samples. Specifically, the preset value of the low content area of kaolinite, the average of the kaolinite content of the plurality of sandstone samples, and the standard deviation of the kaolinite content of the plurality of sandstone samples satisfy the following relationship:

[0070] Y2 = u2 + d2,

[0071] In the formula, Y2 is the preset value of the low content area of kaolinite, u2 is the average of the kaolinite content of the plurality of sandstone samples, and d2 is the standard deviation of the kaolinite content of the plurality of sandstone samples.

[0072] In some embodiments, in the step S6222, the interval between the contours of the kaolinite content contour map determined in the area to be surveyed can be set to 5 wt.% to facilitate the determination of the low content area of kaolinite.

[0073] In some embodiments, in the step S63, the first uranium ore-forming favorable area, the montmorillonite content contour map, and the kaolinite content contour map can be spatially layered and superimposed in the GIS platform, and the area that is simultaneously located in the first uranium ore-forming favorable area, the high content area of montmorillonite determined in the step S61, and the low content area of kaolinite determined in the step S62 is determined as the second uranium ore-forming favorable area through spatial intersection operation.

[0074] In some embodiments, in the step S40, green sandstone samples at multiple heights of the multiple drill holes are obtained. Compared with the content of montmorillonite and kaolinite in the gray sandstone samples, the content of montmorillonite and kaolinite in the green sandstone samples is higher. Therefore, in the embodiments of the present application, the green sandstone samples at multiple heights of the multiple drill holes are obtained instead of the gray sandstone samples, which is more conducive to measuring the content of montmorillonite and kaolinite in the sandstone samples.

[0075] In some embodiments, in the step S30, the multiple drill holes are located on the transverse and longitudinal exploration lines of the first uranium metallogenic favorable area, and the distance between any two adjacent drill holes is equal, so as to ensure that the selected drill holes can reflect the distribution of montmorillonite and kaolinite in the area to be explored, thereby ensuring that the second uranium metallogenic favorable area can be determined according to the content of montmorillonite and kaolinite in the sandstone samples obtained from the drill holes.

[0076] In some embodiments, when the positions of the drill holes are determined, a typical drill hole can be selected, and the position of the typical drill hole is determined.

[0077] In some embodiments, the distance between any two adjacent drill holes can be 100m-200m, so as to ensure that the selected drill holes can reflect the distribution of montmorillonite and kaolinite in the area to be explored, while avoiding that the number of selected drill holes is too large to affect the efficiency of determining the uranium metallogenic area. For example, the distance between any two adjacent drill holes is 150m.

[0078] In some embodiments, in the step S40, multiple sandstone samples are obtained at each drill hole in the height direction at equal intervals, so as to obtain as many samples of each stratum as possible, which is conducive to improving the accuracy of the determined content of montmorillonite and kaolinite.

[0079] In some embodiments, in the step S40, multiple sandstone samples are obtained at each drill hole in the height direction at equal intervals with a spacing of 5m-10m. In such embodiments, the multiple sandstone samples are obtained at equal intervals with the above spacing range, which is further conducive to improving the accuracy of the determined content of montmorillonite and kaolinite.

[0080] For example, multiple sandstone samples are obtained at each drill hole in the height direction at equal intervals with a spacing of 6m.

[0081] In some embodiments, in the step S50, the following steps can also be included: S51, cleaning the plurality of sandstone samples obtained in the step S40; S52, pretreating the plurality of cleaned sandstone samples; S53, reprocessing the plurality of pretreated sandstone samples to make the plurality of sandstone samples into a plurality of natural slices; and S54, measuring the contents of montmorillonite and kaolinite in the plurality of natural slices to determine the contents of montmorillonite and kaolinite in the plurality of sandstone samples. In such embodiments, the plurality of sandstone samples obtained in the step S40 are cleaned to remove the mud avoided in the obtained sandstone samples, so as to avoid the mud on the surface of the sandstone samples from affecting the measurement of the contents of montmorillonite and kaolinite. Meanwhile, the plurality of cleaned sandstone samples are pretreated to make the sandstone samples into natural slices. Furthermore, by making the sandstone samples into natural slices, it is not only convenient to measure the contents of montmorillonite and kaolinite, but also beneficial to ensure the accuracy of the finally determined contents of montmorillonite and kaolinite in the sandstone samples.

[0082] Specifically, the plurality of sandstone samples obtained in the step S40 are cleaned. The plurality of cleaned sandstone samples are crushed and sieved to obtain a plurality of sandstone samples with a preset particle size. Then, the plurality of sieved sandstone samples are pickled to remove the carbonate cement in the sandstone samples, so as to avoid affecting the measurement of the contents of montmorillonite and kaolinite. Then, the plurality of pickled sandstone samples are dried, and the slice method is used to make natural slices, and the contents of montmorillonite and kaolinite in the natural slices are measured. The preset particle size can be 60-80 mesh, for example, 70 mesh. When the plurality of pickled sandstone samples are dried, the plurality of pickled sandstone samples can be placed in a blast drying oven and dried at 80°C for 24 hours.

[0083] In some embodiments, in the step S54, the contents of montmorillonite and kaolinite in the plurality of natural slices can be measured by using an X-ray fluorescence spectrometer or a hyperspectral scanner, and the measurement error is controlled within ±2%. Specifically, the contents of montmorillonite and kaolinite in the plurality of natural slices can be measured by using an X-ray fluorescence spectrometer indoors, and the contents of montmorillonite and kaolinite in the plurality of natural slices can be measured by using a hyperspectral scanner outdoors.

[0084] The process of determining the uranium metallogenic area of the to-be-surveyed area by using the method provided by the embodiments of the present application is described below. The to-be-surveyed area is the Hangjinqi surveying area in the northern part of the Ordos Basin.

[0085] (1) First, soil radon measurement work is carried out in the Hangjinqi surveying area in the northern part of the Ordos Basin. When measuring, the point distance between radon measurement points is set to 100 m, the line distance of a line composed of a plurality of radon measurement points is set to 1000 m, the radon data of 2000 radon measurement points are obtained, and are sequentially recorded as C1, C2, C3, …, C2000. 2000 .

[0086] (2) According to the 2000 radon data, the mean and standard deviation of the 2000 radon data are calculated, and then according to the calculated mean and standard deviation of the 2000 radon data, the abnormal value of the radon data is calculated; then, according to the 2000 radon data, the contour map of the 2000 radon data is determined, and according to the calculated abnormal value of the radon data and the contour map of the 2000 radon data, the area enclosed by the contour line greater than the abnormal value of the soil radon data is determined, that is, the first uranium mineralization favorable area.

[0087] (3) Select the existing horizontal and vertical exploration lines in the first uranium mineralization favorable area, and select 23 typical drill holes at equal intervals of 100m-200m (for example, 150m), sequentially recorded as X1, X2, X3, …, X 23 ; then, at an interval of 5m-10m (for example, 6m), 99 green sandstone samples of the lower section of the Zhiluo Group are collected at equal intervals in each drill hole.

[0088] (4) Wash the 99 collected sandstone samples, crush and sieve the 99 washed samples through a 60-80 mesh (for example, 70 mesh) sieve; then, the sieved samples are subjected to acid washing treatment, and after acid washing treatment, the samples are placed in a forced air drying oven at 80°C and dried for 24h; then, the dried samples are made into natural slices by the scraping method.

[0089] (5) The content of montmorillonite and kaolinite in the natural slices is measured by X-ray fluorescence spectrometer, the measurement error is controlled within ±2%, and the measured content of montmorillonite and kaolinite is recorded.

[0090] (6) The mean of the measured montmorillonite content in the sandstone samples, the standard deviation of the montmorillonite content, the mean of the measured kaolinite content in the sandstone samples, and the standard deviation of the kaolinite content are calculated; then, according to the mean and standard deviation of the montmorillonite content in the sandstone samples, the abnormal high value and abnormal low value of the measured montmorillonite content are removed; according to the mean and standard deviation of the kaolinite content in the sandstone samples, the abnormal high value and abnormal low value of the measured kaolinite content are removed, and the corrected montmorillonite and kaolinite content in the multiple sandstone samples is obtained, totaling 97.

[0091] (7) According to the 97 corrected data, the mean of the montmorillonite content in each drill hole and the mean of the kaolinite content in each drill hole are determined, and according to the mean of the montmorillonite content in each drill hole and the mean of the kaolinite content in each drill hole, the montmorillonite content contour map and the kaolinite content contour map are determined, and the contour interval in the contour map is set to 5wt.%.

[0092] (8) According to the 97 data, the mean value of the content of montmorillonite, the standard deviation of the content of montmorillonite, the mean value of the content of kaolinite and the standard deviation of the content of kaolinite in the 97 data are determined; then, according to the mean value of the content of montmorillonite, the standard deviation of the content of montmorillonite, the mean value of the content of kaolinite and the standard deviation of the content of kaolinite in the 97 data, the high content area of montmorillonite in the area to be surveyed and the low content area of kaolinite in the area to be surveyed are determined.

[0093] (9) The first uranium metallogenic favorable area, the montmorillonite content contour map and the kaolinite content contour map are overlaid in space on the GIS platform, and the overlapping area of the first uranium metallogenic favorable area, the high content area of montmorillonite and the low content area of kaolinite is extracted through spatial intersection operation, that is, the second uranium metallogenic favorable area.

[0094] (10) The ratio of the content of montmorillonite to the content of kaolinite in the second uranium metallogenic favorable area is determined, and the area where the ratio of the content of montmorillonite to the content of kaolinite in the second uranium metallogenic favorable area is greater than 2.5 is determined, see Figure 2 , Figure 2 is a schematic diagram of the uranium metallogenic area 21 of the area to be surveyed determined by the method provided by the embodiments of the present application, and the area where the ratio of the content of montmorillonite to the content of kaolinite in the second uranium metallogenic favorable area is greater than 2.5 is the uranium metallogenic area 21 of the area to be surveyed.

[0095] For the embodiments of the present application, it also needs to be explained that the embodiments and the features in the embodiments of the present application can be combined with each other to obtain new embodiments without conflict.

[0096] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for determining the uranium mineralization region of an area to be explored, characterized in that, The method includes the following steps: S10. Obtain soil radon data for the area to be surveyed; S20. Based on the soil radon data, determine the first favorable uranium mineralization area in the area to be explored; S30. Determine the locations of multiple boreholes based on the first favorable uranium mineralization area; S40. Obtain multiple sandstone samples at multiple heights from the multiple boreholes; S50. Determine the content of montmorillonite and kaolinite in the multiple sandstone samples obtained in step S40; S60. Based on the montmorillonite and kaolinite content in the multiple sandstone samples determined in step S50 and the first favorable uranium mineralization area determined in step S20, determine the second favorable uranium mineralization area of ​​the area to be explored. S70. Based on the montmorillonite and kaolinite content in the multiple sandstone samples determined in step S50 and the second favorable uranium mineralization area determined in step S60, determine the uranium mineralization area of ​​the area to be explored.

2. The method according to claim 1, characterized in that, Step S20 also includes the following steps: S21. Based on the soil radon data, determine the mean and standard deviation of the soil radon data; S22. Based on the mean and standard deviation of the soil radon data, determine the outliers of the soil radon data; S23. Determine the area in the survey area where the soil radon data is greater than the outlier value determined in step S22, i.e., the first favorable area for uranium mineralization.

3. The method according to claim 1, characterized in that, Step S60 also includes the following steps: S61. Based on the montmorillonite content in the multiple sandstone samples determined in step S50, determine the high montmorillonite content areas in the area to be surveyed. S62. Based on the kaolinite content in the multiple sandstone samples determined in step S50, determine the low-kaolinite content areas in the area to be surveyed. S63. Based on the first favorable uranium mineralization region, the high montmorillonite content region determined in step S61, and the low kaolinite content region determined in step S62, determine the region that is simultaneously located within the first favorable uranium mineralization region, the high montmorillonite content region determined in step S61, and the low kaolinite content region determined in step S62, i.e., the second favorable uranium mineralization region.

4. The method according to claim 1, characterized in that, Step S70 also includes the following steps: S71. Based on the montmorillonite and kaolinite contents in the multiple sandstone samples determined in step S50, determine the ratio of montmorillonite content to kaolinite content in the second uranium mineralization favorable area. S72. Determine the preset ratio of montmorillonite content to kaolinite content in the uranium mineralization area; S73. Based on the ratio determined in step S71 and the preset ratio determined in step S72, determine the area in the second uranium mineralization favorable area where the ratio of montmorillonite content to kaolinite content is greater than the preset ratio, i.e., the uranium mineralization area of ​​the area to be explored.

5. The method according to claim 3, characterized in that, Step S61 also includes the following steps: S611. Correct the montmorillonite content in the plurality of sandstone samples determined in step S50 to obtain the corrected montmorillonite content in the plurality of sandstone samples. S612. Based on the corrected montmorillonite content in the multiple sandstone samples, determine the high-content montmorillonite areas within the area to be surveyed.

6. The method according to claim 5, characterized in that, Step S611 also includes the following steps: S6111. Based on the montmorillonite content in the plurality of sandstone samples determined in step S50, determine the average value of the montmorillonite content in the plurality of sandstone samples. S6112. Based on the montmorillonite content in the plurality of sandstone samples determined in step S50 and the average value determined in step S6111, determine the standard deviation of the montmorillonite content in the plurality of sandstone samples. S6113. Based on the average value determined in step S6111 and the standard deviation determined in step S6112, remove the abnormal data in the montmorillonite content of the multiple sandstone samples determined in step S40 to obtain the corrected montmorillonite content of the multiple sandstone samples.

7. The method according to claim 6, characterized in that, Step S612 also includes the following steps: S6121. Based on the corrected montmorillonite content in the plurality of sandstone samples, determine the average montmorillonite content of each of the boreholes. S6122. Based on the average montmorillonite content of each borehole, determine the montmorillonite content contour map of the area to be surveyed. S6123. Determine the preset values ​​for high montmorillonite content areas; S6124. Based on the montmorillonite content contour map of the area to be surveyed and the preset value determined in S6123, determine the area in the montmorillonite content contour map of the area to be surveyed where the montmorillonite content is greater than the preset value determined in S6123. The area is the high montmorillonite content area in the area to be surveyed.

8. The method according to claim 3, characterized in that, Step S62 also includes the following steps: S621. Correct the kaolinite content in the plurality of sandstone samples determined in step S50 to obtain the corrected kaolinite content in the plurality of sandstone samples. S622. Based on the corrected kaolinite content in the multiple sandstone samples, determine the low-kaolinite content areas within the area to be surveyed.

9. The method according to claim 8, characterized in that, Step S621 also includes the following steps: S6211. Based on the kaolinite content in the plurality of sandstone samples determined in step S50, determine the average value of the kaolinite content in the plurality of sandstone samples. S6212. Based on the kaolinite content in the plurality of sandstone samples determined in step S50 and the average value determined in step S6211, determine the standard deviation of the kaolinite content in the plurality of sandstone samples. S6213. Based on the average value determined in step S6211 and the standard deviation determined in step S6212, remove the abnormal data in the kaolinite content of the multiple sandstone samples determined in step S50 to obtain the corrected kaolinite content in the multiple sandstone samples.

10. The method according to claim 9, characterized in that, Step S622 also includes the following steps: S6221. Based on the corrected kaolinite content in the plurality of sandstone samples, determine the average kaolinite content of each of the boreholes; S6222. Based on the average kaolinite content of each borehole, determine the kaolinite content contour map of the area to be surveyed. S6223. Determine the preset values ​​for the low-content areas of kaolinite; S6224. Based on the kaolinite content contour map of the area to be surveyed and the preset value determined in S6223, determine the area in the kaolinite content contour map of the area to be surveyed where the kaolinite content is less than the preset value determined in S6223. The area is the low kaolinite content area in the area to be surveyed.

11. The method according to any one of claims 1-10, characterized in that, In step S40, green sandstone samples are obtained at multiple heights from the multiple boreholes.

12. The method according to any one of claims 1-11, characterized in that, In step S30, The plurality of boreholes are located along the horizontal and vertical exploration lines of the first uranium mineralization favorable area, and the distance between any two adjacent boreholes is equal.

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