阅读说明：本技术 快速寻找盆地隐伏砂岩型铀矿方法 (Method for rapidly searching basin concealed sandstone type uranium ore ) 是由 王培建 全旭东 范正国 江民忠 张积运 汪远志 段晨宇 骆燕 石岩 刘彦涛 于 2020-07-21 设计创作，主要内容包括：本发明涉及一种快速寻找盆地隐伏砂岩型铀矿方法,收集盆地铀矿地质及重力资料,研究砂岩型铀矿控矿构造特征；开展航空伽玛能谱测量,获取铀窗原始计数率；对原始铀窗计数率进行校正换算,求取铀含量,筛选航放铀异常及高场；对异常或高场进行地面查证,并采集土壤化探样,分析铀及镭元素含量,求取铀镭平衡系数；利用铀镭平衡系数进行约束,用航放铀含量数据计算测区镭含量,筛选镭异常及高场；制作镭异常及高场分布图,结合控矿构造圈定砂岩型铀矿找矿有利区。本发明能有效提取深源铀衰变子体镭异常信息,能快速圈定盆地隐伏砂岩型铀矿有利区,为盆地寻找隐伏铀矿提供了一种方法。(The invention relates to a method for rapidly searching a basin hidden sandstone type uranium deposit, which is used for collecting geological and gravity data of the basin uranium deposit and researching ore control structure characteristics of the sandstone type uranium deposit; carrying out aviation gamma energy spectrum measurement to obtain the original counting rate of a uranium window; correcting and converting the counting rate of the original uranium window, solving the uranium content, and screening abnormal aviation uranium release and high fields; ground checking is carried out on the abnormal or high-field, soil chemical samples are collected, the content of uranium and radium elements is analyzed, and the uranium radium balance coefficient is obtained; constraining by utilizing a uranium radium balance coefficient, calculating radium content in a detection area by utilizing aviation uranium content data, and screening radium abnormality and high fields; and (4) preparing radium abnormal and high-field distribution patterns, and determining the sandstone-type uranium ore prospecting favorable area by combining ore control structure. The method can effectively extract the abnormal information of deep source uranium decay daughter radium, can quickly define the beneficial region of the basin concealed sandstone type uranium ore, and provides a method for searching the concealed uranium ore in the basin.)

1. A method for rapidly searching basin concealed sandstone type uranium ore is characterized by comprising the following steps:

a. collecting geological data and gravity data of known uranium ores in a basin, and determining ore control structure characteristics of sandstone-type uranium ores;

b. carrying out aviation gamma energy spectrum measurement in a basin to obtain the original counting rate of a uranium window;

c. correcting and converting the original counting rate of the uranium window to obtain the uranium aviation discharge content data, counting the uranium aviation discharge content data of the basin, making an aviation discharge uranium content contour map, and screening the abnormal uranium aviation discharge and the high uranium aviation discharge field;

d. ground check is carried out on the screened aviation uranium anomaly and the aviation uranium high field, ground gamma energy spectrum is developed, the positions of the ground radioactive anomaly and the ground radioactive high field are determined, a measuring line is arranged by taking the ground radioactive anomaly and the ground radioactive high field as centers, soil geochemical measurement is carried out, the content of uranium elements and radium elements is analyzed, and the uranium radium balance coefficient is obtained;

e. gridding the uranium radium balance coefficients, extracting the uranium radium balance coefficients corresponding to different positions of the whole basin by using the flight path of the navigation uranium content data, and solving the radium content data of the whole basin;

f. according to the obtained radium content data of the whole basin, a radium content contour map is made, and radium abnormity and a radium high field are screened;

g. and (3) manufacturing radium abnormal and radium high-field distribution patterns, and combining geological data and gravity data of known uranium ores to define and control an ore fracture and radium abnormal or dense overlapping area of the radium high field as a sandstone type uranium ore prospecting beneficial area.

2. The method for rapidly searching for the basin hidden sandstone type uranium deposit according to claim 1, wherein in the step a, collecting geological and gravity data of the basin uranium deposit, vectorizing a geological map, digitizing the gravity data, extracting grid gravity data, calculating a grid gravity vertical first derivative, and making a gravity plane contour map; and (3) carrying out projection change on the geological map and the gravity plane isoline map, unifying the geological map and the gravity plane isoline map into the same coordinate system, and researching the ore control structure characteristics of the sandstone-type uranium ore by combining geological data.

3. The method for rapidly searching for the basin hidden sandstone type uranium deposit according to claim 1, wherein in the step b, an aviation gamma spectrum instrument is carried on a helicopter in the basin to carry out aviation gamma spectrum measurement, the measurement height is generally 80-100 m, and the distance between measurement lines is 200-500 m.

4. The method for rapidly searching for the basin concealed sandstone type uranium ore according to claim 1, wherein in the step c, correction conversion is carried out on an original counting rate of a uranium window, wherein the correction conversion comprises window stripping coefficients, ground sensitivity, atmospheric radon correction coefficients, altitude attenuation coefficients, aerial sensitivity and comprehensive background correction, so that aviation uranium content data are obtained; the method comprises the steps of counting aviation uranium discharge content data of basins, solving the average value and standard deviation of the whole basin, making an aviation uranium discharge content contour map, screening aviation uranium discharge abnormity and an aviation uranium discharge high field, wherein the aviation uranium discharge high field is larger than the average value x +2 times of standard deviation of the whole basin, and the aviation uranium discharge abnormity is larger than the average value x +3 times of standard deviation of the whole basin.

5. The method for rapidly searching for the basin concealed sandstone type uranium ore according to claim 1, wherein in the step d, when soil geochemistry measurement is carried out, the measurement distance is 1000-2000 m, the point distance is 100-500 m, collected soil samples are numbered, the weight of the samples is not less than 500 g, indoor chemical exploration is carried out to analyze the content of uranium and radium elements in the soil samples, and the uranium radium balance coefficient is obtained.

6. The method for rapidly searching for the basin concealed sandstone type uranium ore according to claim 1, wherein in the step f, the radium high field is more than x +2 times of standard deviation of the basin whole-area average value, and the radium anomaly is more than x +3 times of standard deviation of the basin whole-area average value.

Technical Field

The invention relates to a uranium ore exploration method, in particular to a method for quickly searching a basin concealed sandstone type uranium ore.

Background

Basin sandstone type uranium ore occupies the main position of uranium ore exploration in China, but through years of exploration and development, shallow exposed ore beds are basically found out, the uranium ore exploration difficulty is higher and higher, and the nuclear energy safety in China is directly influenced. The method and means for finding the uranium ores in the blind or deep sandstone type are further explored, the breakthrough of finding the uranium ores in the basin sandstone type in China is realized, the self-sufficiency of uranium resources is achieved, and the method and the device have important significance for guaranteeing the national safety of China.

Disclosure of Invention

The invention aims to provide a method for quickly searching basin concealed sandstone type uranium ores, and aims to solve the problems that the ore searching difficulty of the uranium ores is increasingly high and the nuclear energy safety of China is influenced.

The invention is realized by the following steps: a method for rapidly searching basin concealed sandstone type uranium ore comprises the following steps:

a. and collecting geological data and gravity data of the known uranium ore in the basin, and determining ore control structure characteristics of the sandstone-type uranium ore.

b. And carrying out aviation gamma energy spectrum measurement in the basin to obtain the original counting rate of the uranium window.

c. And correcting and converting the original counting rate of the uranium window to obtain the uranium navigation release content data, counting the uranium navigation release content data of the basin, making a uranium navigation release content contour map, and screening out the uranium navigation release abnormity and the uranium navigation release high field.

d. Ground verification is carried out on the aviation uranium anomaly and the aviation uranium high field obtained through screening, ground gamma energy spectrum is developed, the positions of the ground radioactive anomaly and the ground radioactive high field are determined, a measuring line is arranged by taking the ground radioactive anomaly and the ground radioactive high field as the center, soil geochemical measurement is carried out, the content of uranium elements and radium elements is analyzed, and the uranium radium balance coefficient is obtained.

e. And gridding the uranium radium balance coefficient, extracting the uranium radium balance coefficient corresponding to different positions of the whole basin by using the flight path of the navigation uranium content data, and solving the radium content data of the whole basin.

f. And (4) according to the obtained radium content data of the whole basin, making a radium content contour map, and screening radium abnormality and radium high field.

g. And (3) manufacturing radium abnormal and radium high-field distribution patterns, and combining geological data and gravity data of known uranium ores to define and control an ore fracture and radium abnormal or dense overlapping area of the radium high field as a sandstone type uranium ore prospecting beneficial area.

In the step a, collecting geological and gravity data of the basin uranium deposit, vectorizing a geological map, digitizing the gravity data, extracting grid gravity data, solving a grid gravity vertical first derivative, and manufacturing a gravity plane isoline graph; and (3) carrying out projection change on the geological map and the gravity plane isoline map, unifying the geological map and the gravity plane isoline map into the same coordinate system, and researching the ore control structure characteristics of the sandstone-type uranium ore by combining geological data.

In the step b, carrying an aviation gamma spectrum instrument on the basin by a helicopter to carry out aviation gamma spectrum measurement, wherein the measurement height is generally 80-100 m, and the distance between measurement lines is 200-500 m.

In the step c, carrying out correction conversion on the original counting rate of the uranium window, wherein the correction conversion comprises window stripping coefficient, ground sensitivity, atmospheric radon correction coefficient, altitude attenuation coefficient, aerial sensitivity and comprehensive background correction, so as to obtain uranium aviation discharge content data; the method comprises the steps of counting aviation uranium discharge content data of basins, solving the average value and standard deviation of the whole basin, making an aviation uranium discharge content contour map, screening aviation uranium discharge abnormity and an aviation uranium discharge high field, wherein the aviation uranium discharge high field is larger than the average value x +2 times of standard deviation of the whole basin, and the aviation uranium discharge abnormity is larger than the average value x +3 times of standard deviation of the whole basin.

In step d, when soil geochemistry measurement is carried out, the measurement distance is 1000-2000 m, the point distance is 100-500 m, the collected soil sample is numbered, the weight of the sample is not less than 500 g, the content of uranium and radium elements in the soil sample is analyzed through indoor chemical exploration, and the uranium radium balance coefficient is obtained.

In step f, the radium high field is larger than the average value x +2 times of standard deviation of the whole basin area, and the radium abnormality is larger than the average value x +3 times of standard deviation of the whole basin area.

The method comprises the steps of analyzing ore control structure characteristics of sandstone-type uranium ores by collecting known geological data and gravity data of the uranium ores in the basin, carrying out aerial gamma-ray spectrum measurement, obtaining an aerial uranium discharge abnormity and a uranium high field according to the measured data, carrying out ground detection and verification on the uranium abnormity and the uranium high field, calculating radium content data of the whole basin, screening out the radium abnormity and the radium high field, and finally delineating an area where ore control breakage and radium abnormity or radium high field are overlapped intensively to serve as an ore finding beneficial area. The method can quickly and effectively extract the abnormal information of the radium of the basin source exploration uranium decay daughter, provides a quick and effective method for searching the concealed or deep sandstone-type uranium ore in the basin, has wide application prospect, and is suitable for popularization and application.

Drawings

FIG. 1 is a flow chart of the present invention.

Detailed Description

As shown in fig. 1, the present invention comprises the steps of:

a. and collecting geological data and gravity data of the known uranium ore in the basin, and determining ore control structure characteristics of the sandstone-type uranium ore.

b. And carrying out aviation gamma energy spectrum measurement in the basin to obtain the original counting rate of the uranium window.

c. And correcting and converting the original counting rate of the uranium window to obtain the uranium navigation release content data, counting the uranium navigation release content data of the basin, making a uranium navigation release content contour map, and screening out the uranium navigation release abnormity and the uranium navigation release high field.

d. Ground verification is carried out on the aviation uranium anomaly and the aviation uranium high field obtained through screening, ground gamma energy spectrum is developed, the positions of the ground radioactive anomaly and the ground radioactive high field are determined, a measuring line is arranged by taking the ground radioactive anomaly and the ground radioactive high field as the center, soil geochemical measurement is carried out, the content of uranium elements and radium elements is analyzed, and the uranium radium balance coefficient is obtained.

e. And gridding the uranium radium balance coefficient, extracting the uranium radium balance coefficient corresponding to different positions of the whole basin by using the flight path of the navigation uranium content data, and solving the radium content data of the whole basin.

f. And (4) according to the obtained radium content data of the whole basin, making a radium content contour map, and screening radium abnormality and radium high field.

g. And (3) manufacturing radium abnormal and radium high-field distribution patterns, and combining geological data and gravity data of known uranium ores to define and control an ore fracture and radium abnormal or dense overlapping area of the radium high field as a sandstone type uranium ore prospecting beneficial area.

Firstly, collecting geological and gravity data of a basin uranium deposit, carrying out vectorization on a geological map, digitalizing the gravity data, extracting grid gravity data, solving a grid gravity vertical first-order derivative, and manufacturing a gravity plane isoline graph. And (3) carrying out projection change on the geological map and the gravity plane isoline map, unifying the geological map and the gravity plane isoline map into the same coordinate system, and researching the ore control structure characteristics of the sandstone-type uranium ore by combining geological data. The slope structure is characterized by gradual change on the grid gravity, and the fracture structure is shown as different face boundaries or linear abnormal zones in the gravity plane contour map part of the grid gravity or the vertical first derivative.

Then, carrying an aviation gamma spectrum instrument on the basin by a helicopter to carry out aviation gamma spectrum measurement, wherein the measurement height is generally 80-100 m, the measurement line interval is 200-500 m, and the original counting rate of the uranium window is obtained through aviation gamma spectrum measurement.

Carrying out correction conversion on the obtained uranium window original counting rate, wherein the correction conversion comprises a window stripping coefficient, ground sensitivity, an atmospheric radon correction coefficient, a height attenuation coefficient, air sensitivity and comprehensive background correction, so as to obtain aviation uranium content data; the method comprises the steps of counting aviation uranium discharge content data of a basin, solving an average value and a standard deviation of the whole basin, making an aviation uranium discharge content contour map, screening aviation uranium discharge abnormity and an aviation uranium discharge high field, wherein the aviation uranium discharge high field is generally larger than the average value x +2 times of the whole basin, and the aviation uranium discharge abnormity is generally larger than the average value x +3 times of the whole basin.

Ground verification is carried out on the aviation uranium anomaly and the aviation uranium high field obtained through screening, ground gamma spectrum measurement is firstly carried out, irregular route measurement of a gamma spectrum instrument model is utilized, the ground radioactive anomaly or the high field position is searched, a navigation positioning instrument is utilized to extract coordinates, and a foundation is provided for lateral line arrangement.

Then soil geochemical measurement is carried out, a measuring line is arranged by taking ground radioactive abnormity or a high field as a center, the measuring distance is 1000-2000 m, the point distance is 100-500 m, the collected soil sample is numbered, the weight of the sample is not less than 500 g, the content of uranium and radium elements in the soil sample is analyzed through indoor chemical exploration, the balance coefficient of the uranium radium is obtained, and the balance coefficient of the uranium radium is radium content/uranium content × 3.4.4 3.4 × 10^-7。

The uranium radium balance coefficients are gridded, corresponding uranium radium balance coefficients of different positions of the whole basin are extracted by using the flight path of the navigation uranium content data, and the navigation uranium radium data is multiplied by the uranium radium balance coefficients and then multiplied by 3.4 × 10^-7Thus, the radium content data of the whole basin is obtained. And according to the obtained radium content data of the whole basin, calculating the average value and the standard deviation of the radium content data of the whole basin area, making a radium content contour map, and screening radium abnormality and radium high field. The radium high field is generally larger than the average value x +2 times of standard deviation of the whole basin area, and the radium abnormity is generally larger than the average value x +3 times of standard deviation of the whole basin area.

A radium abnormal and high-field distribution map is manufactured, a sandstone-type uranium ore control structure explained by geological and gravity data is projected onto the radium abnormal and high-field distribution map, a man-machine interaction mode is adopted, a sandstone-type uranium ore searching beneficial area is defined in a region where fracture of ore control, radium abnormal and high-field dense superposition are defined, and the deep part of the area has better sandstone-type uranium ore searching potential.

The method comprises the steps of analyzing ore control structure characteristics of sandstone-type uranium ores by collecting known geological data and gravity data of the uranium ores in the basin, carrying out aerial gamma-ray spectrum measurement, obtaining an aerial uranium discharge abnormity and a uranium high field according to the measured data, carrying out ground detection and verification on the uranium abnormity and the uranium high field, calculating radium content data of the whole basin, screening out the radium abnormity and the radium high field, and finally delineating an area where ore control breakage and radium abnormity or radium high field are overlapped intensively to serve as an ore finding beneficial area. The method can quickly and effectively extract the abnormal information of the radium of the basin source exploration uranium decay daughter, provides a quick and effective method for searching the concealed or deep sandstone-type uranium ore in the basin, has wide application prospect, and is suitable for popularization and application.