阅读说明：本技术 基于航放资料圈定盐湖型钾盐矿远景区的方法 (Method for delineating salt lake type sylvite prospect remote areas based on navigation data ) 是由 石连成 刘波 赵丛 韩鹏辉 张翔 张文峰 王勇刚 杨玉勤 沈正新 于 2021-09-23 设计创作，主要内容包括：本发明提供了一种基于航放资料圈定盐湖型钾盐矿远景区的方法,包括以下步骤：a、收集研究区的建造构造图、坐标位置和航空伽马能谱K/U/Th的grd网格数据。b、按照研究区设定的投影参数对建造构造图进行拼接和grd网格数据进行拼接。c、拼接的建造构造图并添加已知盐湖型钾盐矿坐标位置,绘制地质底图。d、对拼接的grd网格数据进行平均值归一化处理。e、对归一化的grd网格数据分别做K/U和K/Th的比值运算,之后进行增强运算,得到航放钾异常参数。f、对航放钾异常参数绘制等值线平面图。g、等值线平面图与地质底图叠加分析,二者重合区域即为圈定的盐湖型钾盐矿远景区。本发明方法将地质与航空地球物理信息相结合,能够快速、经济、较准确的圈定找矿远景区。(The invention provides a method for delineating a salt lake type sylvite prospect based on navigation data, which comprises the following steps of: a. and collecting a construction map, coordinate positions and grd grid data of the K/U/Th aeronautical gamma energy spectrum of the research area. b. And splicing the constructed construction diagram and splicing the grd grid data according to the projection parameters set in the research area. c. And (5) splicing the constructed map, adding the coordinate position of the known salt lake type sylvite, and drawing a geological floor map. d. And carrying out average value normalization processing on the spliced grd grid data. e. And respectively carrying out K/U and K/Th ratio operation on the normalized grd grid data, and then carrying out enhancement operation to obtain abnormal parameters of the potassium emission of the aviation. f. And drawing an isoline plan view of the potassium release abnormal parameters. g. And (4) performing superposition analysis on the contour line plan and the geological floor map, wherein the superposed area of the contour line plan and the geological floor map is the defined salt lake type sylvite prospect area. The method combines geological information and aviation geophysical information, and can rapidly, economically and accurately define and find the mineral prospect area.)

1. A method for delineating a salt lake type sylvite prospect scenic spot based on navigation data is characterized by comprising the following steps:

a. 1: 25 ten thousand construction diagrams, the coordinate position of the known salt lake type sylvite ore and grd grid data of the aviation gamma energy spectrum K, U, Th;

b. splicing the building construction drawing according to the established projection parameters to obtain a spliced building construction drawing; when the research area comprises a plurality of aviation geophysical prospecting working areas, splicing the grd grid data according to the set projection parameters to obtain spliced grd grid data;

c. b, extracting the fourth series lake Hunan chemical deposition construction, the recent series lake Hunan chemical deposition construction and the ancient series lake Hunan chemical deposition construction areas of the construction structure diagram spliced in the step b, adding the coordinate positions of known salt lake type sylvite ores, and drawing a geological floor diagram;

d. b, performing average normalization processing on the grd grid data spliced in the step b to obtain normalized grd grid data;

e. respectively carrying out K/U and K/Th ratio operation on the normalized grd grid data, and then carrying out (K/U) × (K/Th) operation to obtain abnormal parameters of potassium emission;

f. setting a background value for the potassium aviation discharge abnormal parameter obtained in the step e, extracting a high-value area of the potassium aviation discharge abnormal parameter larger than the background value, and drawing an isoline plan;

g. and (e) performing superposition analysis on the contour line plan in the step (f) and the geological floor map drawn in the step (c), wherein a superposed area of the contour line plan and the geological floor map is a defined salt lake type sylvinite distant scene.

2. The method for delineating the salt lake type sylvite landscape site based on the aerial data as claimed in claim 1, wherein in the step b, the projection transformation and the splicing of the framing construction map are performed according to the projection parameters established in the research area to obtain the spliced construction map; when the research area only comprises one aviation geophysical prospecting working area, splicing is not needed; when the research area comprises a plurality of aerial geophysical prospecting working areas, projection transformation needs to be carried out on the collected grd grid data, and then splicing is carried out to obtain spliced grd grid data.

3. The method for delineating the salt lake type sylvite prospect area based on the radiology data of claim 2, wherein in the step b, the jointed construction diagram is combined with the point, line and surface files of different image frames according to the classification of the geological units, and the combined point, line and surface file attributes are modified according to the classification of the geological units, so that the attributes are unified.

4. The method for delineating the salt lake type sylvite remote site based on the aerial data as claimed in claim 1, wherein in the step d, the average values of the spliced grd grid data are firstly counted respectively, and then each spliced grd grid data is divided by the corresponding average value to perform the normalization process, so as to obtain the normalized grd grid data.

5. The method for delineating the salt lake type sylvite landscape site based on the aviation amplifier data as claimed in claim 1, wherein in the step f, the specific operation of setting the background value for the abnormal parameter of the aviation amplifier potassium obtained in the step e is as follows: firstly, counting the maximum value, the minimum value, the average value and the mean square error of the aviation potassium discharge abnormal parameters after enhancement treatment, and if the average value is not in accordance with the normal distribution, carrying out iterative removal treatment of the mean square error of +/-2 times of the average value until the average value is in accordance with the normal distribution; and (4) counting the average value and the mean square error of the abnormal parameters of the potassium radioamplifier which are in accordance with normal distribution after the processing, taking the average value plus 0.5 time mean square error as a background value, extracting a high value area of the abnormal parameters of the potassium radioamplifier which is greater than the background value, and drawing an isoline plan.

6. The method for delineating the prospect of the salt lake type sylvite mine based on the aerial discharge data as claimed in claim 1, wherein in the step g, the prospect is classified according to the comprehensive information characteristics of the known salt lake type sylvite mine.

Technical Field

The invention relates to the technical field of sylvite exploration, in particular to a method for delineating a salt lake type sylvite prospect based on aerial discharge data.

Background

Under the target requirements of strengthening strategic mineral resource planning management, improving reserve safety guarantee energy and implementing a new round of mining breakthrough strategic action, the exploration and development of the sylvite mineral resources are bound to bring up a new climax. The aerial gamma-ray spectrum measurement is used as a method which can directly detect the content distribution of the potassium element on the earth surface, has wide coverage, is rapid and efficient, and can provide a basis for delineating the sylvite prospect. In recent years, large-area aviation geophysical prospecting measurement mainly based on uranium, multi-metal and oil gas is completed in basins such as China western firewood, Tuhaan, Quercoas, Tarim and the like, and a large amount of aviation gamma energy spectrum data are obtained. How to establish a method for delineating the distant scenic spot of the salt lake type sylvite ore based on the aviation amplifier data based on the known mineralization characteristics of the salt lake type sylvite ore and the aviation gamma energy spectrum data has important significance.

In the investigation of apocynum sylvestre at the end of the 20 th century, a distant scenic spot was defined by adopting a technology combining geophysical prospecting and remote sensing, but no clear technical method is formed for the distant view evaluation of the salt lake type sylvite. The seismic and natural gamma well logging method with high exploration precision is mainly suitable for an exploration stage with a small work area range and is not suitable for an early long-term evaluation stage.

Disclosure of Invention

The invention aims to provide a method for delineating a salt lake type sylvite prospect based on navigation data, so as to solve the problem that the existing method for delineating the salt lake type sylvite prospect is ambiguous.

The invention is realized by the following steps: a method for delineating a salt lake type sylvite prospect scenic spot based on navigation amplifier data comprises the following steps:

a. 1: 25 ten thousand construction diagrams, the coordinate position of the known salt lake type sylvite ore and grd grid data of the aviation gamma energy spectrum K, U, Th;

b. splicing the building construction drawing according to the established projection parameters to obtain a spliced building construction drawing; when the research area comprises a plurality of aviation geophysical prospecting working areas, splicing the grd grid data according to the set projection parameters to obtain spliced grd grid data;

c. b, extracting the fourth series lake Hunan chemical deposition construction, the recent series lake Hunan chemical deposition construction and the ancient series lake Hunan chemical deposition construction areas of the construction structure diagram spliced in the step b, adding the coordinate positions of known salt lake type sylvite ores, and drawing a geological floor diagram;

d. b, performing average normalization processing on the grd grid data spliced in the step b to obtain normalized grd grid data;

e. respectively carrying out K/U and K/Th ratio operation on the normalized grd grid data, and then carrying out (K/U) × (K/Th) operation to obtain abnormal parameters of potassium emission;

f. setting a background value for the potassium aviation discharge abnormal parameter obtained in the step e, extracting a high-value area of the potassium aviation discharge abnormal parameter larger than the background value, and drawing an isoline plan;

g. and (e) performing superposition analysis on the contour line plan in the step (f) and the geological floor map drawn in the step (c), wherein a superposed area of the contour line plan and the geological floor map is a defined salt lake type sylvinite distant scene.

Further, the invention can be realized according to the following technical scheme:

in the step b, performing projection transformation and splicing of the framing construction drawing according to the projection parameters set in the research area to obtain a spliced construction drawing; when the research area only comprises one aviation geophysical prospecting working area, splicing is not needed; when the research area comprises a plurality of aerial geophysical prospecting working areas, projection transformation needs to be carried out on the collected grd grid data, and then splicing is carried out to obtain spliced grd grid data.

In the step b, merging the point, line and surface files of different map sheets according to the classification of the geological units for the spliced construction map, and modifying the attributes of the merged point, line and surface files according to the category of the geological units to make the attributes uniform.

In the step d, firstly, the average values of the spliced grd grid data are respectively counted, and then, normalization processing is performed on each spliced grd grid data by dividing the corresponding average value, so as to obtain normalized grd grid data.

In the step f, the specific operation of setting a background value for the potassium radioemission abnormal parameter obtained in the step e is as follows: firstly, counting the maximum value, the minimum value, the average value and the mean square error of the aviation potassium discharge abnormal parameters after enhancement treatment, and if the average value is not in accordance with the normal distribution, carrying out iterative removal treatment of the mean square error of +/-2 times of the average value until the average value is in accordance with the normal distribution; and (4) counting the average value and the mean square error of the abnormal parameters of the potassium radioamplifier which are in accordance with normal distribution after the processing, taking the average value plus 0.5 time mean square error as a background value, extracting a high value area of the abnormal parameters of the potassium radioamplifier which is greater than the background value, and drawing an isoline plan.

And step g, grading and dividing the prospecting prospect area by combining the comprehensive information characteristics of the known salt lake type sylvite mine.

According to the method, after the construction maps of the research area are spliced, coordinate positions are added to the spliced construction maps to form a geological base map, meanwhile, splicing, normalization processing and ratio operation are carried out on grd grid data to obtain abnormal parameters of potassium emission by air, an isoline plan is drawn by processing the abnormal parameters of potassium emission by air, and the geological base map and the isoline plan are overlapped to obtain the defined salt lake type sylvinite scenic spot. The method has the advantages of easy acquisition of data information, simple data processing, rich mineral abnormal information and obvious form, and can provide favorable basis for rapidly delineating salt lake type sylvite prospect scenic spots. The method combines geological information and aviation geophysical information, and can rapidly, economically and accurately define and find the mineral prospect area.

Detailed Description

The invention discloses a method for delineating a salt lake type sylvite prospect based on navigation data, which comprises the following steps of:

a. 1: 25 thousands of construction maps, coordinate positions of known salt lake type sylvite mines and grd grid data of the aviation gamma energy spectrum K, U, Th.

b. Splicing the building construction drawing according to the established projection parameters to obtain a spliced building construction drawing; and when the research area comprises a plurality of aviation geophysical prospecting working areas, splicing the grd grid data according to the set projection parameters to obtain the spliced grd grid data. The predetermined projection parameters are projection parameters that are set according to the work requirements of the region of interest.

Specifically, the projection transformation and the splicing of the framing construction diagram are performed according to the projection parameters set in the study area, and the spliced construction diagram is obtained. And merging the point files, the line files and the surface files of different image frames according to the classification of the geological units for the spliced construction map, and modifying the attributes of the merged point files, line files and surface files according to the category of the geological units to unify the attributes.

When the research area only comprises one aviation geophysical prospecting working area, splicing is not needed; when the research area comprises a plurality of aerial geophysical prospecting working areas, projection transformation needs to be carried out on the collected grd grid data, and then splicing is carried out to obtain spliced grd grid data.

c. And c, extracting the fourth series lake Hunan chemical deposition construction, the recent series lake Hunan chemical deposition construction and the ancient series lake Hunan chemical deposition construction areas spliced in the step b, adding the coordinate positions of known salt lake type sylvinite, and drawing a geological floor map.

d. And c, carrying out average normalization processing on the grd grid data spliced in the step b to obtain normalized grd grid data.

Specifically, the average values of the spliced grd grid data are respectively counted, and then each spliced grd grid data is divided by the corresponding average value to perform normalization processing, so as to obtain normalized grd grid data.

e. And respectively carrying out K/U and K/Th ratio operation on the normalized grd grid data, and then carrying out (K/U) × (K/Th) operation to obtain the potassium aviation discharge abnormal parameters.

In the step e, K/U, K/Th ratio operation is respectively performed on the normalized aviation gamma energy spectrum K, U, Th grid data to enhance aviation potassium discharge abnormal information, and in order to highlight the characteristics of high potassium, low uranium and low thorium of the aviation gamma energy spectrum of the salt lake type sylvite mine, the operation of aviation potassium discharge abnormal parameter information enhancement processing (K/U) (K/Th) is performed.

f. And e, setting a background value for the potassium aviation discharge abnormal parameter obtained in the step e, extracting a high-value area of the potassium aviation discharge abnormal parameter larger than the background value, and drawing an isoline plan.

The specific operation of setting the background value of the potassium aviation discharge abnormal parameter obtained in the step e is as follows: firstly, counting the maximum value, the minimum value, the average value and the mean square error of the aviation potassium discharge abnormal parameters after enhancement treatment, and if the average value is not in accordance with the normal distribution, carrying out iterative removal treatment of the mean square error of +/-2 times of the average value until the average value is in accordance with the normal distribution; and (4) counting the average value and the mean square error of the abnormal parameters of the potassium radioamplifier which are in accordance with normal distribution after the processing, taking the average value plus 0.5 time mean square error as a background value, extracting a high value area of the abnormal parameters of the potassium radioamplifier which is greater than the background value, and drawing an isoline plan.

g. And (e) performing superposition analysis on the contour line plan in the step (f) and the geological floor map drawn in the step (c), wherein a superposed area of the contour line plan and the geological floor map is a defined salt lake type sylvinite distant scene. And (4) grading and dividing the prospecting prospect area by combining the comprehensive information characteristics of the known salt lake type sylvite ore.