A method for identifying structural geochemical anomalies in concealed ore detection

Abstract

The present invention provides a structural geochemical combination anomaly identification method for concealed ore detection, comprising: collecting a series of structural geochemical samples at the scale of a ore deposit or a mining area; determining the types and numbers of a series of elements based on expert knowledge for different types of hydrothermal deposits, and testing and analyzing their content values; determining the leading edge halo indicator elements, the near-ore halo indicator elements, and the tail halo indicator elements based on the axial zonation characteristics of the primary halo of the hydrothermal deposit; calculating the combined anomalies of the leading edge halo indicator elements, the near-ore halo indicator elements, and the tail halo indicator elements through orthogonal basis transformation, and drawing a spatial distribution pattern diagram of the three combined anomalies; revealing the deep mineralization characteristics of the hydrothermal deposit and the spatial positioning law of the ore body by studying the intensity, shape, size, and superposition relationship of the three combined anomalies. On this basis, determine the center of the anomaly, predict the occurrence space of the blind ore body, and delineate the prospecting target area.

Description

Technical Field

[0001] The invention relates to the field of geographic information technology, and in particular to a structural geochemical combination anomaly identification method for concealed mine detection. Background Art

[0002] According to the axial zonation of primary halo elements in hydrothermal deposits: the leading halo indicator elements are As, Sb, Hg, B, Ba, F, etc., the near-ore halo indicator elements are Au, Ag, Cu, Pb, Zn, Cd, etc., and the tail halo indicator elements are W, Bi, Mo, Mn, Co, Ni, etc. Multivariate statistical analysis methods, such as factor analysis and cluster analysis, are usually used to identify the combination relationship of tectonic geochemical primary halo elements and their abnormal patterns. However, when multivariate statistical analysis methods reveal the combination relationship of tectonic geochemical primary halo elements, they are usually affected by multiple factors, such as the correlation interference between the main factors, the superposition of multiple geological / geochemical processes, and the complex and variable composition of various geological bodies. They do not objectively reveal and interpret the combination relationship between tectonic geochemical primary halo elements, which brings uncertainty to the positioning prediction of deep concealed mines.

[0003] Therefore, how to accurately characterize the combination relationship and abnormal pattern between the primary halo elements in tectonic geochemistry to reduce the uncertainty of the location prediction of deep hidden mines is still a problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0004] The invention provides a structural geochemical combination anomaly identification method for concealed mine detection, which is used to solve the problem of uncertainty in the positioning prediction of deep concealed mines in the prior art.

[0005] The present invention provides a method for identifying structural geochemical combination anomalies for detecting hidden ore, comprising:

[0006] Collect a range of tectonic geochemical samples;

[0007] Determine the content values ​​of a series of elements of the series of structural geochemical samples by expert knowledge in laboratory testing and analysis, and form the series of elements into an element set;

[0008] Based on the axial zonation characteristics of primary halos of different types of hydrothermal deposits, the leading halo indicator elements, the near-ore halo indicator elements and the tail halo indicator elements in the element set are determined by expert knowledge;

[0009] Through orthogonal basis transformation, the combined anomalies of leading edge halo indicator elements, near-ore halo indicator elements and tail halo indicator elements are calculated respectively.

[0010] Draw the combined anomaly spatial distribution pattern of leading edge halo indicator elements, near-ore halo indicator elements and tail halo indicator elements, determine the anomaly center, and locate the hidden ore storage space.

[0011] According to a method for detecting hidden mines by identifying structural geochemical combination anomalies provided by the present invention, collecting a series of structural geochemical samples specifically includes:

[0012] The tectonic rocks were sampled using irregular grids, and sampling was intensified in fault zones, fissure zones, fracture zones, rock mass-ore source layer contact zones, mineralized zones, and at the interfaces between different rock masses.

[0013] According to a method for detecting hidden mines by identifying structural geochemical combination anomalies provided by the present invention, the step of collecting a series of structural geochemical samples further comprises:

[0014] In areas without structural development, the point spacing is enlarged to collect lithology control samples.

[0015] According to a method for detecting hidden ore by identifying structural geochemical combined anomalies provided by the present invention, the combined anomalies of leading halo indicator elements, near-ore halo indicator elements and tail halo indicator elements are calculated by orthogonal basis transformation, specifically including:

[0016] The equilibrium value b1 of the leading edge halo indicator element is calculated by the following formula:

[0017]

[0018] Wherein, r1 represents the number of elements in the element set marked as leading edge halo indicator elements, s1 represents the number of elements in the element set not marked as leading edge halo indicator elements, g(x + ) represents the geometric mean value of the content of each element marked as the leading edge halo indicator element in the element set, g(x - ) represents the geometric mean value of the content of each element in the element set that is not marked as a leading edge halo indicator element;

[0019] The equilibrium value b2 of the indicator element near the ore halo is calculated by the following formula:

[0020]

[0021] Wherein, r2 represents the number of elements in the element set marked as near-ore halo indicator elements, s2 represents the number of elements in the element set not marked as near-ore halo indicator elements, g(y + ) represents the geometric mean value of the content of each element marked as a near-ore halo indicator element in the element set, g(y - ) represents the geometric mean value of the content of each element in the element set that is not marked as a near-halo indicator element;

[0022] The equilibrium value b3 of the leading edge halo indicator element is calculated by the following formula:

[0023]

[0024] Wherein, r3 represents the number of elements in the element set marked as tail halo indicator elements, s3 represents the number of elements in the element set not marked as tail halo indicator elements, g(x + ) represents the geometric mean value of the content of each element marked as the tail halo indicator element in the element set, g(x - ) represents the geometric mean of the content values ​​of each element in the element set that is not marked as a tail halo indicator element.

[0025] According to a method for detecting hidden ore by identifying structural geochemical combination anomalies provided by the present invention, during the detection model training process, the combined abnormal spatial distribution pattern of leading edge halo indicator elements, near-ore halo indicator elements and tail halo indicator elements is drawn to determine the anomaly center and locate the hidden ore occurrence space, specifically including:

[0026] The equilibrium values ​​b1, b2 and b3 were imported into GIS software, and the inverse distance weighted interpolation method was used to transform the discrete equilibrium values ​​b1, b2 and b3 into continuous equilibrium values ​​b1, b2 and b3, and the spatial distribution pattern of b1, b2 and b3 was obtained.

[0027] According to a method for detecting concealed ore by identifying structural geochemical combined anomalies provided by the present invention, the method of drawing the combined abnormal spatial distribution pattern of leading edge halo indicator elements, near-ore halo indicator elements and tail halo indicator elements, determining the abnormal center, and locating the hidden ore occurrence space also includes:

[0028] The spatial distribution pattern maps of b1, b2 and b3 are transformed into contour maps. According to the intensity, shape and size of the combined anomaly, the center of the element combination anomaly is determined and the mineralization law of the concealed ore is interpreted.

[0029] According to a method for detecting concealed ore by identifying structural geochemical combined anomalies provided by the present invention, the method of drawing the combined abnormal spatial distribution pattern of leading edge halo indicator elements, near-ore halo indicator elements and tail halo indicator elements, determining the abnormal center, and locating the hidden ore occurrence space also includes:

[0030] The combined anomaly contour maps of the leading edge halo indicator elements, the near-ore halo indicator elements and the tail halo indicator elements are superimposed together;

[0031] Based on the superposition relationship between b1, b2 and b3, the ore body erosion characteristics, the migration direction of ore-forming fluids, the deep mineralization characteristics and mineralization trends are judged, the hidden mineral storage space is located, and the prospecting target area is delineated.

[0032] The method for detecting hidden ore by identifying structural geochemical combination anomalies provided by the present invention collects a series of structural geochemical samples; tests and analyzes the content values ​​of a series of elements determined by expert knowledge, and combines these elements into an element set; determines the leading edge halo indicator elements, the near-ore halo indicator elements and the tail halo indicator elements based on the axial zonation characteristics of the primary halo of the hydrothermal deposit and the elements tested and analyzed; calculates the equilibrium values ​​of the leading edge halo indicator elements, the near-ore halo indicator elements and the tail halo indicator elements through orthogonal basis transformation, and plots their spatial distribution patterns to determine the anomaly center and predict blind ore bodies. The combined anomaly identification of the leading edge halo, the near-ore halo and the tail halo indicator elements of the structural geochemical primary halo is realized, and the deep mineralization characteristics of the hydrothermal deposit and the spatial positioning law of the hidden ore are revealed by analyzing the size, shape, intensity, superposition relationship and the like of the three combined anomalies. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A framework diagram for identifying and interpreting the combination anomaly of primary halo elements in tectonic geochemistry provided by the present invention;

[0035] Figure 2 A schematic flow chart of a concealed mine detection method for identifying structural geochemical combination anomalies provided by the present invention;

[0036] Figure 3 The spatial distribution pattern diagram of the tail halo balance value W-Sn-Bi-Mo provided by the present invention;

[0037] Figure 4 A contour map of the W-Sn-Bi-Mo combination anomaly of the tail halo balance value provided by the present invention;

[0038] Figure 5 The present invention provides a combined anomaly overlay diagram of leading edge halo indicator elements, near-ore halo indicator elements and tail halo indicator elements. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Due to the uncertainty of deep hidden mine location prediction in the prior art, Figure 1-Figure 5 The blind mine tracking method for identifying structural geochemical combination anomalies of the present invention is described.

[0041] Ore-forming elements form different types of hydrothermal deposits in different geological processes, such as magmatic hydrothermal deposits, metamorphic hydrothermal deposits, contact metasomatic deposits, porphyry deposits, etc., which are closely related to the mineralization temperature of the ore-forming elements. High, medium and low temperature hydrothermal processes can form different combinations of indicator elements, forming different primary halos in the surrounding rocks near the ore and inside the rock mass. According to the axial zoning sequence of the primary halo of the ore body, it can be divided into the front halo, the near-ore halo and the tail halo. The indicator elements of the front halo are As, Sb, Hg, B, Ba, F, I, etc., the indicator elements of the near-ore halo are Pb, Zn, Cu, Au, Ag, Cd, etc., and the indicator elements of the tail halo are W, Bi, Sn, Mo, Mn, Co, Ni, Cr, V, etc.

[0042] Structure is the dominant factor controlling the coupling relationship between various geological bodies in a certain area, and it is the only way to connect deep ore bodies with shallow surface mineralized primary halos. Structural geochemical research emphasizes the use of tectonic rocks collected in tectonic systems as research objects, and fractured tectonic rocks contain rich information about the aggregation and dispersion of mineralizing materials. Therefore, through the study of structural geochemistry, hidden mines can be detected and new mineral deposits can be discovered. Therefore, based on the elemental zonation characteristics of the primary halos of structural geochemistry, this patent innovatively proposes a structural geochemical combination anomaly identification method for concealed mine detection. Figure 1 The framework diagram for identifying and interpreting the anomaly of the primary halo elements in tectonic geochemistry provided by the present invention is as follows: Figure 1 As shown, the present invention emphasizes the guiding role of geological expert knowledge, by selecting a reasonable indicator element combination pattern, forming a group pair with the remaining elements, and then using orthogonal basis transformation (Formula 1) to calculate the orthogonal basis coordinates, also known as equilibrium values, and finally draw the spatial distribution pattern diagram and contour map of the equilibrium value. By studying the abnormal patterns of different element combinations in the primary halo of structural geochemistry, blind mine tracking, deep hidden mine positioning prediction and prospecting target area delineation can be achieved.

[0043]

[0044] Where r represents the number of elements in the first group marked with a positive sign (+), s represents the number of elements in the second group marked with a negative sign (-), and g(x + ) represents the geometric mean of the variables of each component in the first group whose elements are marked with a positive sign (+), g(x - ) represents the geometric mean of the component variables whose elements in the second group are marked with a negative sign (-).

[0045] Figure 2 A schematic flow chart of a method for detecting hidden ore by identifying structural geochemical combination anomalies provided by the present invention, the method comprising:

[0046] Step 110, collect a series of structural geochemical samples.

[0047] Specifically, tectonic geochemical sample collection, that is, tectonic rock collection.

[0048] Step 120 , in laboratory testing and analysis, the content values ​​of a series of elements in a series of structural geochemical samples are determined based on expert knowledge, and the series of elements are grouped into an element set.

[0049] Specifically, a series of elements that need to be tested and analyzed are determined based on expert knowledge, and the content of each element in each sample is determined in the laboratory. The content of elements in structural geochemical samples is tested and analyzed. Generally, industry experts determine the types and quantities of elements to be measured based on their understanding of different types of hydrothermal deposits. Generally, it is necessary to test and analyze the content of more than 20 or even more than 30 elements in each sample.

[0050] Step 130, based on the axial zoning characteristics of primary halos of different types of hydrothermal deposits and through expert knowledge, determine the leading halo indicator elements, near-ore halo indicator elements and tail halo indicator elements in the element set.

[0051] Specifically, based on the axial zoning characteristics of the primary halos of different types of hydrothermal deposits and the measured tectonic geochemical elements, the leading halo indicator elements, near-ore halo indicator elements and tail halo indicator elements are determined.

[0052] Step 140, by orthogonal basis transformation, the equilibrium values ​​of the leading edge halo indicator element, the near-ore halo indicator element and the tail halo indicator element are calculated respectively.

[0053] Specifically, the three indicator elements are grouped with the remaining elements, and then the equilibrium values ​​of the leading halo indicator elements, near-ore halo indicator elements and tail halo indicator elements are calculated using the orthogonal basis transformation. The equilibrium values ​​are used to characterize the abnormal patterns of the indicator elements and their spatial distribution characteristics.

[0054] Step 150, draw the combined abnormal spatial distribution pattern of the leading edge halo indicator element, the near-ore halo indicator element and the tail halo indicator element, determine the abnormal center, and locate the hidden ore storage space.

[0055] Specifically, by analyzing the size, shape, intensity, superposition relationship, etc. of the three types of combined anomalies, the deep mineralization characteristics of hydrothermal deposits and the spatial positioning laws of hidden mines are revealed.

[0056] The method for detecting hidden ore by identifying structural geochemical combination anomalies provided by the embodiment of the present invention collects a series of structural geochemical samples; tests and analyzes a series of element content values ​​determined by expert knowledge; determines the leading edge halo indicator elements, near-ore halo indicator elements and tail halo indicator elements based on the axial zonation characteristics of the primary halo of different types of hydrothermal deposits and the elements tested and analyzed; calculates the equilibrium values ​​of the leading edge halo indicator elements, near-ore halo indicator elements and tail halo indicator elements through orthogonal basis transformation; plots the element combination anomalies represented by the equilibrium values ​​and their spatial distribution patterns, determines the anomaly center, and predicts hidden ore. The invention realizes the combined anomaly identification of the leading edge halo, near-ore halo and tail halo indicator elements of the structural geochemical primary halo, and reveals the deep mineralization characteristics of hydrothermal deposits and the spatial positioning law of hidden ore by analyzing the size, shape, intensity, superposition relationship, etc. of the three combined anomalies.

[0057] Based on the above embodiment, in the method, collecting a series of structural geochemical samples specifically includes:

[0058] The tectonic rocks were sampled using irregular grids, and sampling was intensified in fault zones, fissure zones, fracture zones, rock mass-ore source layer contact zones, mineralized zones, and at the interfaces between different rock masses.

[0059] Specifically, instead of sticking to the fixed grid sampling method in the traditional geochemical primary halo, the tectonic rock collection is carried out along the conductive structures, such as faults, intrusive contact structures, etc., with irregular grid sampling, and intensified sampling in fault zones, fissure zones, broken zones, rock-ore source layer contact zones, mineralized zones and the junctions of different rock bodies.

[0060] Based on any of the above embodiments, in the method, collecting a series of structural geochemical samples further includes:

[0061] In areas without structural development, lithology control samples are collected.

[0062] Specifically, in areas without structural development, the point spacing is enlarged during sampling to collect lithological control samples.

[0063] Based on any of the above embodiments, in the method, the combined anomaly of the leading halo indicator element, the near-ore halo indicator element and the tail halo indicator element is calculated by orthogonal basis transformation, specifically including:

[0064] The equilibrium value b1 of the leading edge halo indicator element is calculated by the following formula:

[0065]

[0066] Wherein, r1 represents the number of elements in the element set marked as leading edge halo indicator elements, s1 represents the number of elements in the element set not marked as leading edge halo indicator elements, g(x +) represents the geometric mean value of the content of each element marked as the leading edge halo indicator element in the element set, g(x - ) represents the geometric mean value of the content of each element in the element set that is not marked as a leading edge halo indicator element;

[0067] The equilibrium value b2 of the indicator element near the ore halo is calculated by the following formula:

[0068]

[0069] Wherein, r2 represents the number of elements in the element set marked as near-ore halo indicator elements, s2 represents the number of elements in the element set not marked as near-ore halo indicator elements, g(y + ) represents the geometric mean value of the content of each element marked as a near-ore halo indicator element in the element set, g(y - ) represents the geometric mean value of the content of each element in the element set that is not marked as a near-halo indicator element;

[0070] The equilibrium value b3 of the leading edge halo indicator element is calculated by the following formula:

[0071]

[0072] Wherein, r3 represents the number of elements in the element set marked as tail halo indicator elements, s3 represents the number of elements in the element set not marked as tail halo indicator elements, g(x + ) represents the geometric mean value of the content of each element marked as the tail halo indicator element in the element set, g(x - ) represents the geometric mean of the content values ​​of each element in the element set that is not marked as a tail halo indicator element.

[0073] Specifically, assuming that each sample is tested for the content of 8 elements, 8 variables can be obtained, namely x1, x2, x3, x4, x5, x6, x7, and x8.

[0074] If the leading edge halo indicator variables are x2 and x3, they are taken as a group, and the remaining variables x1, x4, x5, x6, x7, x8 form another group. The two groups form a group pair b1 = [x2, x3 | x1, x4, x5, x6, x7, x8]. According to the orthogonal basis change formula, the equilibrium value b1 of the leading edge halo indicator element can be calculated, that is:

[0075]

[0076] If the near-ore halo indicator variables are x1 and x5, we can get the group pair b2 = [x1, x5|x2, x3, x4, x6, x7, x8]. According to the orthogonal basis change formula, we can calculate the equilibrium value b2 of the near-ore halo indicator element, that is:

[0077]

[0078] If the tail halo indicator variables are x4, x6, x7, we can get the group pair b3 = [x4, x6, x7|x1, x2, x3, x5, x8]. According to the orthogonal basis change formula, we can calculate the equilibrium value b3 of the tail halo indicator element, that is:

[0079]

[0080] Based on any of the above embodiments, in the method, drawing the combined abnormal spatial distribution pattern of the leading edge halo indicator element, the near-ore halo indicator element and the tail halo indicator element, determining the abnormal center, and predicting the blind ore body specifically includes:

[0081] The equilibrium values ​​b1, b2 and b3 were imported into GIS software, and the inverse distance weighted interpolation method was used to transform the discrete equilibrium values ​​b1, b2 and b3 into continuous equilibrium values ​​b1, b2 and b3, and the spatial distribution pattern of b1, b2 and b3 was obtained.

[0082] Specifically, the equilibrium values ​​b1, b2 and b3 are imported into GIS software, and the inverse distance weighted interpolation method is used to transform the discrete equilibrium values ​​b1, b2 and b3 into continuous equilibrium values ​​b1, b2 and b3, and three spatial distribution pattern maps are obtained. Figure 3 This is the spatial distribution diagram of the W-Sn-Bi-Mo combination anomaly of the tail halo balance value provided by the present invention.

[0083] Based on the above embodiment, in the method, drawing the combined abnormal spatial distribution pattern of the leading edge halo indicator element, the near-ore halo indicator element and the tail halo indicator element, determining the abnormal center, and locating the hidden ore occurrence space also includes:

[0084] The spatial distribution pattern maps of b1, b2 and b3 are transformed into contour maps. According to the intensity, shape and size of the combined anomaly, the center of the element combination anomaly is determined and the mineralization law of the concealed ore is interpreted.

[0085] Specifically, Figure 3 The spatial distribution map of the tail halo balance value W-Sn-Bi-Mo combination anomaly provided by the present invention is converted into a contour map by setting a reasonable threshold value, so as to quickly determine the shape, scale and size of the anomaly center. Figure 4 The contour map of the tail halo balance value W-Sn-Bi-Mo combination anomaly provided by the present invention is as follows: Figure 4As shown, the combined anomaly contour map of the tail halo balance value W-Sn-Bi-Mo is displayed.

[0086] Based on the above embodiment, in the method, drawing the combined abnormal spatial distribution pattern of the leading edge halo indicator element, the near-ore halo indicator element and the tail halo indicator element, determining the abnormal center, and locating the hidden ore occurrence space also includes:

[0087] The combined anomaly contour maps of the leading edge halo indicator elements, the near-ore halo indicator elements and the tail halo indicator elements are superimposed together;

[0088] Based on the superposition relationship between b1, b2 and b3, the ore body erosion characteristics, the migration direction of ore-forming fluids and the mineralization trend are judged, the hidden ore storage space is located, and the prospecting target area is delineated.

[0089] Specifically, Figure 5 The superposition diagram of the indicator elements of the leading edge halo, near-ore halo and tail halo provided by the present invention is as follows: Figure 5 As shown in the figure, the combined abnormal contour maps of the leading edge halo, near-ore halo and tail halo indicator elements are superimposed together, and other relevant elements, such as mineral deposits, faults, etc. are superimposed. Through the superposition relationship between b1, b2 and b3, the ore body erosion characteristics, the migration direction of ore-forming fluids and the mineralization trend are judged, blind ore bodies are predicted, the hidden ore storage space is located, and the prospecting target area is delineated.

[0090] The key points of the present invention are as follows:

[0091] (1) For different hydrothermal deposits, the indicator elements of the leading halo, near-ore halo, and tail halo will be different, especially the indicator elements of the near-ore halo. Therefore, geological experts need to have a good understanding of the genetic characteristics of the deposits and give full play to the leading role of expert knowledge in order to select a reasonable combination of indicator elements.

[0092] (2) When converting the spatial distribution map of equilibrium values ​​into a contour map, it is necessary to select an appropriate threshold to draw the contour lines in order to better express and determine the abnormal center.

[0093] (3) When superimposing the contour maps of the indicator elements of the leading halo, near-ore halo, and tail halo, the expression of the three line types should be clear and easy to distinguish, which will help to correctly interpret the superposition relationship and deep mineralization laws.

[0094] Compared with the conventional multivariate statistical analysis method for determining the element combination relationship and anomaly pattern of the primary halo of tectonic geochemistry, the advantages of this invention are reflected in the following three aspects: (1) Taking into account the guiding role of geologists' professional knowledge, geologists can quickly determine the indicator element combination pattern of the front halo, near-ore halo and tail halo of hydrothermal deposits based on the genetic characteristics of hydrothermal deposits, while eliminating the interference of other elements; (2) It solves the closure effect problem of composition data and eliminates the pseudo-correlation phenomenon between elements, making the experimental results and the interpretation of mineralization laws more objective; (3) It is efficient, practical and robust in enhancing hidden source anomalies, simulating pseudo-anomalies, and intuitively interpreting geological / geochemical processes.

[0095] Finally, 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for identifying structural geochemical anomalies in concealed mine detection. It is characterized in that include: Collect a range of tectonic geochemical samples; Determine the content values ​​of a series of elements of the series of structural geochemical samples by expert knowledge in laboratory testing and analysis, and form the series of elements into an element set; Based on the axial zonation characteristics of primary halos of different types of hydrothermal deposits, the leading halo indicator elements, the near-ore halo indicator elements and the tail halo indicator elements in the element set are determined by expert knowledge; Through orthogonal basis transformation, the combined anomalies of leading edge halo indicator elements, near-ore halo indicator elements and tail halo indicator elements are calculated respectively, including: The equilibrium value of the leading edge halo indicator element is calculated by the following formula b 1 : in, represents the number of elements in the element set marked as leading edge halo indicator elements, represents the number of elements in the element set that are not marked as leading edge halo indicator elements, represents the geometric mean of the content values ​​of each element marked as the leading edge halo indicator element in the element set, It represents the geometric mean value of the content of each element in the element set that is not marked as a leading halo indicator element; The equilibrium value of the indicator element near the ore halo is calculated by the following formula b 2 : in, represents the number of elements in the element set marked as near-ore halo indicator elements, represents the number of elements in the element set that are not marked as near-ore halo indicator elements, It represents the geometric mean value of the content of each element marked as near-halo indicator element in the element set, It represents the geometric mean value of the content of each element in the element set that is not marked as a near-ore halo indicator element; The equilibrium value of the leading edge halo indicator element is calculated by the following formula b 3 : in, represents the number of elements in the element set marked as tail halo indicator elements, represents the number of elements in the element set that are not marked as tail halo indicator elements, It represents the geometric mean value of the content of each element marked as tail halo indicator element in the element set, It represents the geometric mean value of the content of each element in the element set that is not marked as a tail halo indicator element; Draw the combined abnormal spatial distribution pattern of leading edge halo indicator elements, near-ore halo indicator elements and tail halo indicator elements, determine the abnormal center, and locate the hidden ore storage space, including: The balance value b 1 , b 2 and b 3 Imported into GIS software, the discrete equilibrium values ​​are interpolated using the inverse distance weighted interpolation method. b 1 , b 2 and b 3 Transformed to a continuous equilibrium value b 1 , b 2 and b 3 ,get b 1 , b 2 and b 3 The spatial distribution pattern of The method of drawing the combined abnormal spatial distribution pattern of the leading edge halo indicator element, the near-ore halo indicator element and the tail halo indicator element, determining the abnormal center, and locating the hidden ore occurrence space also includes: Will b 1 , b 2 and b 3 The spatial distribution pattern map is transformed into a contour map, and the center of element combination anomaly is determined according to the intensity, shape and size of the combination anomaly, so as to interpret the mineralization law of concealed ore; The method of drawing the combined abnormal spatial distribution pattern of the leading edge halo indicator element, the near-ore halo indicator element and the tail halo indicator element, determining the abnormal center, and locating the hidden ore occurrence space also includes: The combined anomaly contour maps of the leading edge halo indicator elements, the near-ore halo indicator elements and the tail halo indicator elements are superimposed together; based on b 1 , b 2 and b 3 The superposition relationship between them can be used to determine the erosion characteristics of the ore body, the migration direction of the ore-forming fluid, the deep mineralization characteristics and the mineralization trend, locate the space for hidden mineral occurrence, and delineate the prospecting target area.

2. The method for detecting hidden mines by identifying structural geochemical anomalies according to claim 1, It is characterized in that The collecting of multiple structural geochemical samples specifically includes: The tectonic rocks were sampled using irregular grids, and sampling was intensified in fault zones, fissure zones, fracture zones, rock mass-ore source layer contact zones, mineralized zones, and at the interfaces between different rock masses.

3. The method for predicting hidden ore by identifying structural geochemical combination anomalies according to claim 2, It is characterized in that The collection of a series of structural geochemical samples also includes: In areas without structural development, the point spacing is enlarged to collect lithology control samples.

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