Mine prospecting method based on verification of abnormal high-value section of large-scale chemical prospecting profile

Abstract

The invention belongs to the technical field of mineral exploration, and provides a prospecting method based on verification of an abnormal high-value section of a large-scale chemical exploration section, and the method comprises the following steps: obtaining basic geological data and basic geological features of a working area; determining a geochemical exploration profile line, and carrying out geochemical exploration profile measurement along the profile line to obtain geochemical data; processing geochemical exploration profile measurement data, drawing a geochemical exploration profile map with a large scale of 1: 5000, and identifying an abnormally high value segment in the geochemical exploration profile map; analyzing geochemical characteristics of the abnormal high-value section; delineating a prospecting target area, and carrying out exploration verification on the prospecting target area; deeply analyzing the metallogenic conditions and ore control factors of the prospecting target area, and establishing a metallogenic mode and a prospecting model; performing prospecting prediction on the prospecting target area according to the metallogenic mode and the prospecting model; according to the method, the prospecting efficiency can be improved, deeper theoretical support can be provided through comprehensive analysis, and therefore the success rate and economic benefits of mineral resource exploration are increased.

Description

Technical Field

[0001] The invention belongs to the technical field of mineral exploration, and in particular is a mineral prospecting method based on verifying abnormal high-value sections of large-scale geochemical exploration profiles. Background Art

[0002] In the field of mineral resource exploration, traditional prospecting methods usually rely on a large amount of geological surveys and drilling operations in order to find suitable ore bodies;

[0003] However, existing technologies often lack accuracy in describing the distribution characteristics of geochemical elements. Traditional prospecting methods such as geological mapping and remote sensing technology can provide geological information in a large geographical area, but when faced with a complex geological environment, it is often difficult to reflect minor changes in chemical composition. This leads to the possibility of missing potential resource points even in areas with high mineralization potential. The blindness of drilling operations increases costs and risks, especially in areas with complex geological structures or insufficient data. Secondly, existing mineral resource exploration technologies often lack in-depth analysis of abnormally high value segments. Although many methods can identify abnormally high value phenomena, the subsequent analysis of the causal mechanism is often insufficient to effectively determine the source, migration and enrichment process of mineral resources. This neglect of the causes of mineral genesis makes exploration decisions lack scientific basis, thereby increasing the misjudgment rate of prospecting. In some cases, the lack of a full understanding of the causes of abnormally high values ​​may lead to misjudgment of the ore body, wasting a lot of manpower and material resources. In addition, existing technologies are also insufficient in terms of the success rate of prospecting and benefit evaluation. Since the conventional prospecting process is cumbersome and not systematic, the success rate is often lower than expected, and it requires a lot of repeated trials and corrections, which greatly increases the exploration time and cost. Although some advanced technologies have helped to increase the success rate of prospecting, the lack of effective comprehensive analysis tools and methods still cannot completely solve this problem, resulting in the evaluation of potential mining areas often limited to superficial observations, and failing to fully tap their economic potential.

[0004] To this end, technical personnel in this field have proposed a prospecting method based on verifying abnormally high-value sections of large-scale geochemical profiles, aiming to improve prospecting efficiency, provide more in-depth theoretical support through comprehensive analysis, and enhance the success rate and economic benefits of mineral resource exploration. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a prospecting method based on verifying abnormally high-value sections of large-scale geochemical exploration profiles to solve the problems mentioned in the background technology.

[0006] A prospecting method based on verifying abnormally high-value sections of large-scale geochemical exploration profiles comprises the following steps:

[0007] S1. Obtain basic geological data and basic geological characteristics of the work area;

[0008] S2. Determine the geochemical profile line, make it perpendicular to the mineralized zone or abnormal area, and conduct geochemical profile measurement along the profile line to obtain geochemical data including soil and rock samples;

[0009] S3. Process the geochemical profile measurement data, superimpose the data of different natures, and carry out geochemical profile measurement at a large scale of 1:5000 to identify the abnormally high value sections in the geochemical profile diagram;

[0010] S4. Analyze the geochemical characteristics of the abnormally high value section and determine the abnormal source in combination with the geological background;

[0011] S5. Integrate geochemical exploration data, basic chemical analysis results and original exploration profile data, conduct in-depth analysis of the mineralization conditions and ore-controlling factors in the work area, and establish a mineralization model and prospecting model;

[0012] S6. Based on the mineralization pattern and prospecting model combined with the geochemical characteristics and geological background of the abnormally high-value section, the prospecting target area is delineated, and sampling lines and trenching projects are verified in the areas with strong mineralization and alteration in the prospecting target area.

[0013] Preferably, the step S1 determines the geological background of the working area by collecting basic geological data including geological maps, topographic maps, geological profiles, magmatic activity records, and sedimentary environment information.

[0014] Preferably, determining the geochemical exploration profile line in step S2 includes: marking the existing mineralized belt or the abnormal area detected in history according to the geological background data obtained in step S1, and identifying the mineralization indication characteristics in combination with remote sensing image analysis;

[0015] Select profile lines perpendicular to known mineralized zones or consistent with geological structural trends to cover potential areas, and use cross-sections to collect data in key areas. In areas with complex geological conditions, the angle between the profile line and the stratigraphic trend should be no less than 60 degrees;

[0016] Use GPS and theodolite to accurately mark the starting point, end point and key turning points of the profile line on the topographic map or aerial photograph.

[0017] Preferably, the geochemical profile measurement along the profile line in step S2 includes: determining the sampling depth and interval according to the characteristics of the mineralized zone and historical data;

[0018] Conduct field measurements along the profile line, record the length, azimuth, slope angle parameters of the profile line, and collect different types of samples along the profile line, including soil, rock and sediment;

[0019] Number, record and preserve the collected samples, and record the location, depth, environmental conditions and sample properties of each sampling point;

[0020] The collected samples are sent to the laboratory for geochemical analysis to determine the content of key elements.

[0021] Preferably, the step S3 processes the geochemical profile measurement data, and the geochemical data processing includes data cleaning, data conversion, and calculation of background value and abnormal lower limit. The background value is the average value of the data after removing abnormal values, which is expressed as: where μ bg is the background value, N is the number of samples after removing outliers, X i For each sample value;

[0022] The lower limit of abnormality is expressed as: Where σ is the standard deviation; the data of different properties are superimposed and the main abnormal areas in the data are identified, which is expressed as:

[0023]

[0024] Among them, S is the superposition result, w i is the weight of the i-th variable, X i is the value of the i-th variable, and n is the total number of variables.

[0025] Preferably, the step S3 also uses software for drawing geochemical profiles and performs grid management on discrete data to smoothly display the data on a map;

[0026] Based on the gridded data, a contour map is drawn, and the background value and the lower limit of anomaly are marked in the contour map;

[0027] According to the scale of 1:5000, adjust the size and detail of the map and mark the outlier segments;

[0028] The Z-score statistical method is used to identify abnormally high value segments in the geochemical profile, which is expressed as:

[0029]

[0030] Among them, Z i For sample X i Z-score, X i The sample value to be analyzed is then used to determine the outlier value and identify the abnormally high value segment by setting the threshold.

[0031] Preferably, the step S6 integrates the geochemical data, laboratory analysis results and original exploration profile data, and on the basis of the data integration, conducts an in-depth analysis of the prospecting target area, analyzes the geological background of the target area, and analyzes the mineralization conditions and ore-controlling factors according to the geochemical data and laboratory analysis results;

[0032] According to the analysis results of geological background, mineralization conditions and ore-controlling factors, establish the mineralization model of the target area, including the mineralization process, mineralization age and properties of ore-forming fluids;

[0033] On the basis of the mineralization model, combined with geochemical data, laboratory analysis results and original exploration profile data, a prospecting model is established, which is expressed as:

[0034] M=f(G,C,F,S)

[0035] Among them, G is the geological characteristic parameter, C represents the geochemical characteristic parameter, F is the ore-controlling factor, and S is the prospecting mark.

[0036] Preferably, the step S7 performs prospecting prediction on the prospecting target area according to the mineralization mode and prospecting model, which is expressed as:

[0037] P pred =β0+β1X1+β2X2+...+β n X n

[0038] Among them, P pred represents the predicted mineralization potential or intensity, X1, X2, ..., X n represents the input features of the model, β1,β2,...,β n represents the model parameters;

[0039] Based on the prediction results, a threshold of mineralization potential is set to distinguish between ordinary areas and potential mining areas.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] 1. The present invention can depict the distribution characteristics of geochemical elements in detail through large-scale geochemical exploration profiles. By verifying abnormally high-value sections, the area where mineral resources may exist can be quickly locked, thereby greatly narrowing the scope of prospecting and improving the efficiency of prospecting. Combining knowledge and technical means of multiple disciplines such as geology and geochemistry, a comprehensive analysis of abnormally high-value sections can more accurately determine the existence of mineral resources and reduce the misjudgment rate.

[0042] 2. By verifying the abnormally high value section, the present invention can further analyze the genetic mechanism of mineral resources, including the source of mineralizing materials, migration and enrichment process, etc., to provide more in-depth theoretical support for mineral prospecting;

[0043] 3. The present invention combines the abnormally high-value sections of geochemical profile data for mineral exploration, which can significantly improve the success rate of mineral exploration and greatly increase the possibility of actually obtaining ore bodies. Scientific evaluation of potential mining areas can increase the value of existing resources and maximize economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 The present invention is a flow chart of the prospecting method based on verifying the abnormally high-value section of the large-scale geochemical profile. DETAILED DESCRIPTION

[0045] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0046] As attached Figure 1 As shown:

[0047] Embodiment: The present invention provides a prospecting method based on verifying the abnormal high-value section of a large-scale geochemical exploration profile, comprising the following steps:

[0048] S1. Obtain basic geological data and basic geological characteristics of the work area; determine the geological background of the work area by collecting basic geological data including geological maps, topographic maps, geological profiles, magmatic activity records, and sedimentary environment information.

[0049] S2. Determine the geochemical profile line, make it perpendicular to the mineralized zone or abnormal area, and conduct geochemical profile measurement along the profile line to obtain geochemical data including soil and rock samples;

[0050] Determining the geochemical exploration profile line includes: marking the existing mineralized belt or the abnormal area detected in history according to the geological background data obtained in step S1, and identifying the mineralization indication characteristics in combination with remote sensing image analysis;

[0051] Select profile lines parallel to known mineralized zones or consistent with geological structural trends to cover potential areas, and use cross-sections to collect data in key areas to better understand the distribution of mineralization; in areas with complex geological conditions, the angle between the profile line and the stratigraphic trend should be no less than 60 degrees to reduce the interference of geological structures on geochemical exploration results;

[0052] Use GPS and theodolite to accurately mark the starting point, end point and key turning points of the profile line on the topographic map or aerial photograph.

[0053] Conducting geochemical profile surveys along the profile line includes: determining the depth and interval of sampling based on the characteristics of the mineralized zone and historical data;

[0054] Conduct field measurements along the profile line, record the length, azimuth, and slope angle parameters of the profile line, and collect different types of samples along the profile line, including soil, rock, and sediment, to ensure that the samples can represent the geochemical characteristics of the profile line;

[0055] Number, record and preserve the collected samples, and record the location, depth, environmental conditions and sample properties of each sampling point;

[0056] The collected samples are sent to the laboratory for geochemical analysis to determine the content of key elements.

[0057] By determining the geochemical profile line and conducting geochemical profile measurements, geochemical data including soil and rock samples are obtained, providing important basis for subsequent geological interpretation and mineral prospecting prediction.

[0058] S3. Process the geochemical profile measurement data, superimpose the data of different natures, and carry out geochemical profile measurement at a large scale of 1:5000 to identify the abnormally high value sections in the geochemical profile diagram;

[0059] The geochemical profile measurement data is processed. Geochemical data processing includes data cleaning, data conversion, and calculation of background value and abnormal lower limit. The background value is the average value of the data after removing abnormal values, expressed as: where μ bg is the background value, N is the number of samples after removing outliers, X i For each sample value;

[0060] The lower limit of abnormality is expressed as: Where σ is the standard deviation; the data of different properties are superimposed and the main abnormal areas in the data are identified, which is expressed as:

[0061]

[0062] Among them, S is the superposition result, w i is the weight of the i-th variable, X i is the value of the i-th variable, and n is the total number of variables.

[0063] It also uses software for drawing geochemical profiles and gridding discrete data to display the data smoothly on a map;

[0064] Based on the gridded data, a contour map is drawn, and the background value and the lower limit of anomaly are marked in the contour map;

[0065] According to the scale of 1:5000, adjust the size and detail of the map to ensure that the elements on the map are clearly visible and the scale correctly reflects the actual distance, and use color gradients or markings to highlight abnormally high-value segments; find abnormally high-value areas in the contour map, which are usually characterized by dense contour lines, bright colors, or significantly high values, and mark the location and range of the abnormally high-value segments on the geochemical profile map. This will help with subsequent geological interpretation and mineral exploration.

[0066] The Z-score statistical method is used to identify abnormally high value segments in the geochemical profile, which is expressed as:

[0067]

[0068] Among them, Z i For sample X i Z-score, X i The sample value to be analyzed is then used to determine the outlier value and identify the abnormally high value segment by setting the threshold.

[0069] S4. Analyze the geochemical characteristics of the abnormally high value section and determine the abnormal source in combination with the geological background;

[0070] S5. Integrate the geochemical data, basic chemical analysis results and original exploration profile data, conduct in-depth analysis of the mineralization conditions and controlling factors of the working area, and establish a mineralization model and prospecting model; the geochemical data include drilling location, depth, ore type, degree of mineralization, surrounding rock characteristics and other information; laboratory analysis results include chemical composition, mineral composition and its content, etc.; original exploration profile data include geochemical profile diagram, abnormal high value section, geological characteristics and physical properties, etc.

[0071] Through the integration of geochemical data, basic chemical analysis results and original exploration profile data, and on the basis of data integration, in-depth analysis of the prospecting target area is carried out to analyze the geological background of the target area, and the mineralization conditions and ore-controlling factors are analyzed according to the geochemical data and laboratory analysis results;

[0072] According to the analysis results of geological background, mineralization conditions and ore-controlling factors, establish the mineralization model of the target area, including the mineralization process, mineralization age and properties of ore-forming fluids;

[0073] On the basis of the mineralization model, combined with geochemical data, laboratory analysis results and original exploration profile data, a prospecting model is established, which is expressed as:

[0074] M=f(G,C,F,S)

[0075] Among them, G is the geological characteristic parameter, C represents the geochemical characteristic parameter, F is the ore-controlling factor, and S is the prospecting mark.

[0076] By combining geochemical data, laboratory analysis results and original exploration profile data to make mineral exploration predictions, the success rate of mineral exploration can be effectively improved.

[0077] According to the mineralization pattern and prospecting model, prospecting prediction is carried out for the prospecting target area, which is expressed as:

[0078] P pred =β0+β1X1+β2X2+...+β n X n

[0079] Among them, P pred represents the predicted mineralization potential or intensity, X1, X2, ..., X n represents the input features of the model, β1,β2,...,β n Represents model parameters; according to the prediction results, the threshold of mineralization potential is set to distinguish between ordinary areas and potential mining areas; then by comparing the actual drilling results with the model prediction results, the model is continuously adjusted and optimized to improve the prediction accuracy of the model.

[0080] Based on the established mineralization pattern and prospecting model, the prospecting target area is predicted, various input characteristics are effectively utilized, and the evaluation of mineralization potential is output through mathematical models.

[0081] S6. Based on the mineralization model and prospecting model combined with the geochemical characteristics and geological background of the abnormally high-value section, the prospecting target area is delineated, and the sampling line and trenching engineering verification is carried out in the areas with strong mineralization and alteration in the prospecting target area;

[0082] By verifying the prospecting methods of abnormally high-value sections of large-scale geochemical exploration profiles, the accuracy and success rate of prospecting can be effectively improved, the relevant costs can be reduced, and sustainable resource development and management can be promoted.

[0083] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in this application. Without departing from the scope of the present invention, other replacements, improvements, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to specific embodiments, but extends to a variety of modifications still falling within the scope of the appended claims.

[0084] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0085] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, without undue experimentation, the development effort will be a routine task of design, fabrication, and production.

[0086] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A prospecting method based on verifying abnormally high-value sections of large-scale geochemical exploration profiles, characterized in that: The following steps are involved: S1. Obtain basic geological data and basic geological characteristics of the work area; S2. Determine the geochemical profile line, make it perpendicular to the mineralized zone or abnormal area, and conduct geochemical profile measurement along the profile line to obtain geochemical data including soil and rock samples; S3. Process the geochemical profile measurement data, superimpose the data of different natures, and carry out geochemical profile measurement at a large scale of 1:5000 to identify the abnormally high value sections in the geochemical profile diagram; S4. Analyze the geochemical characteristics of the abnormally high value section and determine the abnormal source in combination with the geological background; S5. Integrate geochemical exploration data, basic chemical analysis results and original exploration profile data, conduct in-depth analysis of the mineralization conditions and ore-controlling factors in the work area, and establish a mineralization model and prospecting model; S6. Based on the mineralization pattern and prospecting model combined with the geochemical characteristics and geological background of the abnormally high-value section, the prospecting target area is delineated, and sampling lines and trenching projects are verified in the areas with strong mineralization and alteration in the prospecting target area.

2. A prospecting method based on verifying abnormally high-value sections of large-scale geochemical exploration profiles as claimed in claim 1, characterized in that: The step S1 determines the geological background of the work area by collecting basic geological data including geological maps, topographic maps, geological profiles, magmatic activity records, and sedimentary environment information.

3. A prospecting method based on verifying abnormally high-value sections of large-scale geochemical exploration profiles as claimed in claim 1, characterized in that: Determining the geochemical exploration profile line in step S2 includes: marking the existing mineralized belt or the abnormal area detected in history according to the geological background data obtained in step S1, and identifying the mineralization indication characteristics in combination with remote sensing image analysis; Select profile lines perpendicular to known mineralized zones or consistent with geological structural trends to cover potential areas, and use cross-sections to collect data in key areas. In areas with complex geological conditions, the angle between the profile line and the stratigraphic trend should be no less than 60 degrees; Use GPS and theodolite to accurately mark the starting point, end point and key turning points of the profile line on the topographic map or aerial photograph.

4. A prospecting method based on verifying abnormally high-value sections of large-scale geochemical exploration profiles as claimed in claim 3, characterized in that: The geochemical profile measurement along the profile line in step S2 includes: determining the sampling depth and interval according to the characteristics of the mineralized zone and historical data; Conduct field measurements along the profile line, record the length, azimuth, slope angle parameters of the profile line, and collect different types of samples along the profile line, including soil, rock and sediment; Number, record and preserve the collected samples, and record the location, depth, environmental conditions and sample properties of each sampling point; The collected samples are sent to the laboratory for geochemical analysis to determine the content of key elements.

5. A prospecting method based on verifying abnormally high-value sections of large-scale geochemical exploration profiles as claimed in claim 1, characterized in that: The step S3 processes the geochemical profile measurement data. The geochemical data processing includes data cleaning, data conversion, and calculation of background value and abnormal lower limit. The background value is the average value of the data after the abnormal value is removed, which is expressed as: where μ bg is the background value, N is the number of samples after removing outliers, X i For each sample value; The lower limit of abnormality is expressed as: Where σ is the standard deviation; The data of different natures are superimposed and the main abnormal areas in the data are identified, which can be expressed as: Among them, S is the superposition result, w i is the weight of the i-th variable, X i is the value of the i-th variable, and n is the total number of variables.

6. A prospecting method based on verifying abnormally high-value sections of large-scale geochemical exploration profiles as claimed in claim 5, characterized in that: The step S3 also uses software for drawing geochemical profiles and gridding the discrete data to smoothly display the data on the map; Based on the gridded data, a contour map is drawn, and the background value and the lower limit of anomaly are marked in the contour map; According to the scale of 1:5000, adjust the size and detail of the map and mark the outlier segments; The Z-score statistical method is used to identify abnormally high value segments in the geochemical profile, which is expressed as: Among them, Z i For sample X i Z-score, X i The sample value to be analyzed is then used to determine the outlier value and identify the abnormally high value segment by setting the threshold.

7. A prospecting method based on verifying abnormally high-value sections of large-scale geochemical exploration profiles as claimed in claim 1, characterized in that: The step S6 integrates the geochemical data, laboratory analysis results and original exploration profile data, and conducts in-depth analysis of the prospecting target area on the basis of the data integration, analyzes the geological background of the target area, and analyzes the mineralization conditions and ore-controlling factors according to the geochemical data and laboratory analysis results; According to the analysis results of geological background, mineralization conditions and ore-controlling factors, establish the mineralization model of the target area, including the mineralization process, mineralization age and properties of ore-forming fluids; On the basis of the mineralization model, combined with geochemical data, laboratory analysis results and original exploration profile data, a prospecting model is established, which is expressed as: M=f(G,C,F,S) Among them, G is the geological characteristic parameter, C represents the geochemical characteristic parameter, F is the ore-controlling factor, and S is the prospecting mark.

8. A prospecting method based on verifying abnormally high-value sections of large-scale geochemical exploration profiles as claimed in claim 1, characterized in that: The step S7 performs prospecting prediction on the prospecting target area according to the mineralization mode and prospecting model, which is expressed as: P pred =β0+β1X1+β2X2+...+β n X n Among them, P pred represents the predicted mineralization potential or intensity, X1, X2, ..., X n represents the input features of the model, β1,β2,...,β n represents the model parameters; Based on the prediction results, a threshold of mineralization potential is set to distinguish between ordinary areas and potential mining areas.

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