A method for prospecting for metallic ore in a shallow cover area
By combining geophysical exploration with shallow drilling and geochemical exploration, the problem of low exploration efficiency in shallowly covered areas for metal deposits has been solved, achieving efficient and accurate exploration while reducing costs.
Patent Information
- Application Number
- CN202610447661.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-04-07
- Publication Date
- 2026-06-09
AI Technical Summary
Traditional methods are inefficient and inaccurate in metal prospecting in shallowly covered areas, making it difficult to meet the needs of efficient exploration, resulting in low exploration levels and untapped potential resources.
A combination of geophysical exploration methods was adopted, including magnetic surveying, induced polarization profiling, well-to-ground charging, and audio-frequency magnetotelluric sounding, combined with shallow drilling and geochemical exploration to gradually narrow down the prospecting target area and conduct deep verification.
It improved the feasibility and efficiency of metal ore exploration in shallowly covered areas, reduced the amount of ineffective exploration work, lowered the exploration cost, and improved the exploration efficiency.
Smart Images
Figure CN122172315A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of mineral exploration technology, and in particular to a method for prospecting for metal deposits in shallowly covered areas. Background Technology
[0002] Shallowly covered areas typically refer to regions covered by loose Quaternary sediments (such as alluvial deposits, aeolian deposits, and colluvial deposits), with a cover layer thickness generally ranging from several meters to 200 meters. Bedrock exposure is limited or completely obscured. In my country, the total area of shallowly covered areas, including the Gobi Desert and other deserts, reaches 1.28 million square kilometers, accounting for 12.3% of the country's land area. These areas are particularly concentrated in the Northwest (Eastern Tianshan Mountains) and Northeast forest regions. These areas are often located in important metallogenic belts, with frequent magmatic activity and complex geological structures, possessing favorable conditions for metal mineralization. Many large and medium-sized metal deposits have been discovered, demonstrating enormous prospecting potential. However, due to the obscuring effect of the cover layer, metal prospecting in shallowly covered areas faces numerous bottlenecks. The applicability of traditional prospecting methods is significantly limited, resulting in an exploration rate generally below 10% in these areas. Only 2% of the total large and medium-sized deposits have been discovered nationwide, and a large amount of potential metal mineral resources have not yet been effectively exploited, becoming a key factor restricting the improvement of my country's metal mineral resource supply capacity.
[0003] Currently, metal prospecting in shallowly covered areas mainly relies on single or simple combinations of traditional geological surveys, geochemical exploration, geophysical exploration, and drilling projects. These methods have obvious limitations in practical applications and cannot meet the needs of efficient and accurate prospecting. Summary of the Invention
[0004] The purpose of this invention is to provide a method for prospecting for metal deposits in shallowly covered areas, in order to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides a method for prospecting for metal deposits in shallowly covered areas, comprising the following steps: S1. Obtain geological data of shallowly covered areas, analyze the geological data, and preliminarily select mineralized prospective areas in shallowly covered areas; S2. For the initially delineated shallow-cover mineralized prospective areas, delineate the prospecting target areas using a combination of geophysical exploration methods. S3. Conduct shallow drilling exploration in the prospecting target area to further narrow down the prospecting target area, and carry out a second round of shallow drilling exploration. S4. Combining the results of geophysical combined measurements and the results of the second round of shallow drilling geochemical exploration, we will conduct in-depth interpretation of each geophysical method, determine the exploration direction, and conduct a comprehensive analysis of each prospecting target area and mineralization potential in the shallow overburden area, and further screen the prospecting target areas. S5. Conduct in-depth verification of the selected mineral exploration target areas.
[0006] Preferably, step S1 specifically includes: Geological data of shallowly covered areas are obtained, and the material composition, cover thickness, scale, metallogenic geological background and metallogenic conditions of shallowly covered areas are analyzed. The characteristics of ore deposits, metallogenic processes and ore-controlling elements are extracted, and the metallogenic regularity and metallogenic specificity are summarized. Among them, the characteristics of ore deposits include ore-bearing rocks, ore-controlling structures and mineralization alteration. Based on the metallogenic regularity, metallogenic exclusivity, and regional geological conditions, prospective metallogenic areas in shallowly covered areas surrounding known mining areas are initially selected according to the direction of regional tectonic lines and the extension direction of ore bodies.
[0007] Preferably, the geophysical exploration combination method includes magnetic surveying, induced polarization profiling, induced polarization sounding, well-to-ground charging method, and audio-frequency magnetotelluric sounding. By analyzing the outliers of each method, the prospecting target area is delineated comprehensively.
[0008] Preferably, the magnetic measurement adopts a small-to-medium scale measurement method to measure the planar distribution range of the ore body in the mining area and determine the dip of the ore body within 500 meters of the shallow overburden area.
[0009] Preferably, the induced polarization profile is obtained using a medium-to-large scale measurement method, based on ground power supply mode and shallow well power supply mode to acquire apparent polarization data of the mining area, and by analyzing the apparent resistivity and maximum value in the apparent polarization data, apparent polarization profile information of shallow-covered areas is obtained.
[0010] Preferably, the induced polarization sounding uses an induced polarization sounding scale device to obtain the location of the mineralized alteration zone at a depth of less than 300m in the shallow overburden area. The initial ABmax is set to 1200m, the initial power of the transmitting power source is set to 20KW, and the current is set to 6-10A. If the thickness of the shallow overburden layer increases, the ABmax distance and the power of the transmitting power source are increased.
[0011] Preferably, the well-to-ground charging method uses a high-power induced polarization device, which obtains shallow polarization anomaly zones within 500m of the shallow cover area by powering the excitation at the location of the alteration zone in the well and receiving it on the surface.
[0012] Preferably, step S3 specifically involves: conducting shallow drilling exploration verification of the prospecting target area, clarifying the rock, mineralization alteration and geochemical characteristics within the mining area, combining rapid field analysis to further narrow down the prospecting target area, and carrying out a second round of shallow drilling exploration verification.
[0013] Therefore, the present invention employs the above-described method for prospecting metal deposits in shallowly covered areas, which has the following beneficial effects: (1) By combining geophysical exploration, the problems of data distortion and low mineral exploration efficiency of traditional single exploration methods in this type of area have been solved, and the feasibility of metal mineral exploration in shallow overburden areas has been greatly improved. (2) By gradually narrowing the exploration range in shallow-covered areas, the blindness of deep drilling was avoided, the amount of ineffective exploration work was greatly reduced, the exploration cost was lowered, and the exploration efficiency was improved.
[0014] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0015] Figure 1 This is a flowchart of a method according to an embodiment of the present invention; Figure 2 This is a contour map of the high-precision magnetic field measurement ΔT polarization of an embodiment of the present invention; Figure 3 This is a plan view of the apparent polarization contour lines of the induced polarization profile according to an embodiment of the present invention. Figure 4 This is a plan view of the apparent resistivity contour lines of the induced polarization profile according to an embodiment of the present invention. Figure 5 This is a diagram showing the northward power supply result according to an embodiment of the present invention; Figure 6 This is a diagram showing the westward power supply result of an embodiment of the present invention; Figure 7 This is a diagram showing the eastward power supply result according to an embodiment of the present invention; Figure 8 This is a geochemical exploration result diagram of shallow Au drilling according to an embodiment of the present invention; Figure 9 This is a diagram showing the results of shallow Cu drilling geochemical exploration in an embodiment of the present invention. Figure 10 This is an alteration zone diagram of an embodiment of the present invention. Detailed Implementation
[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments, and therefore should not be construed as limiting the present invention.
[0017] Example like Figure 1 As shown, the present invention provides a method for prospecting for metal deposits in shallowly covered areas, comprising the following steps: S1. Obtain geological data for shallowly overburdened areas, analyze the material composition, overburden thickness, scale, metallogenic geological background, and metallogenic conditions of these areas, refine deposit characteristics, mineralization processes, and ore-controlling elements, and summarize metallogenic regularities and metallogenic specificity. Deposit characteristics include ore-bearing rocks, ore-controlling structures, and mineralization alteration. Based on metallogenic regularities, metallogenic specificity, and regional geological conditions, preliminary metallogenic prospective areas are selected in shallowly overburdened areas surrounding known mining areas, according to the direction of regional tectonic lines and the extension direction of ore bodies.
[0018] In this embodiment, the exploration of the Karaoyi gold-copper mine is carried out using a shallowly overburdened area as an example. This area is a typical shallowly overburdened area in the northern margin of the Junggar Basin, and no bedrock outcrops have been found in the mining area. According to the mineralization regularity of the mining area, the discovered high-grade copper-gold ore bodies are found in multiple layers, intersecting the interior of the diorite body in the form of fine veins. Therefore, the diorite body is an important ore-bearing rock body in the mining area.
[0019] S2. For the initially delineated shallow-cover mineralized prospective areas, mineral exploration target areas are delineated using a combination of geophysical exploration methods. These methods include magnetic surveying, induced polarization profiling, induced polarization sounding, well-to-ground charging, and audio-frequency magnetotelluric sounding. Anomalies from each method are analyzed to comprehensively delineate the mineral exploration target areas.
[0020] Magnetic measurement: A PMG-2 high-precision magnetometer with a working grid of 100×40 was used for 1:10,000 magnetic measurements. 1:10,000 magnetic measurements can reflect the planar extent of concealed rock masses. Among them, the two sets of high magnetic anomalies, C25-01 and C25-02, trending northwest, are closely related to the intermediate diorite rock mass revealed by shallow drilling. Figure 2 As shown.
[0021] Extended calculations are an important method for semi-quantitative interpretation of magnetic survey results. They can effectively suppress shallow interference and highlight the magnetic field characteristics caused by deep sources. After extended calculations, the C25-01 and C25-02 anomalous geological bodies have a certain burial depth, but the magnetic anomaly results are not obvious beyond a depth of 500m.
[0022] Induced polarization profile measurement: Induced polarization profile measurements were conducted in the eastern part of the mining area, such as... Figure 3 As shown in the planar map of apparent polarizability contour lines, the apparent polarizability anomaly in the shallowly covered area has a relatively low overall amplitude and a distinct northwest-trending characteristic, which is basically consistent with the corresponding geological structure direction. It generally exhibits a pattern of lower values in the northwest and higher values in the southeast. The apparent polarizability values in the northwest covered area are 0.06-0.7%, while those in the southeast bedrock area are between 0.8% and 1.9%. Figure 4 As shown, the corresponding apparent resistivity characteristics are generally stable, exhibiting a clear northwest-southwest trend, consistent with the apparent polarizability characteristics, which show a pattern of lower values in the northwest and higher values in the southeast. The apparent resistivity values in the northwest overburden area range from 70 Ω•m to 450 Ω•m, while those in the southeast bedrock area range from 450 Ω•m to 1200 Ω•m. This indicates that as the overburden thickness increases, both polarizability and resistivity values decrease significantly, suggesting the existence of low-resistivity shielding beneath the shallow overburden.
[0023] To minimize the impact of shallow overburden and low-resistivity shielding on artificial power supply, 1:10,000 induced polarization (IP) profile measurements were conducted using two power supply modes: ground-based and in-well. Other acquisition parameters were uniformly set as follows: ground-based acquisition, point spacing of 40m, initial ABmax of 1200m, power supply cycle of 16s, delay of 150ms, and two stackings. The in-well power supply mode showed significantly higher values in the high-value region compared to the ground-based mode, with a maximum value approximately 25% higher. Because the apparent resistivity calculation formula for the field source device in the in-well power supply mode differs from that in the ground-based power supply mode, and it is not a point power supply method under uniform half-space conditions, the in-well power supply mode cannot calculate the accurate apparent resistivity. Therefore, the apparent resistivity was obtained using the ground-based power supply mode.
[0024] Analysis of apparent resistivity and maxima in apparent polarization data reveals that the medium-to-high polarization (M1 > 1.5%) anomaly is closely related to copper-gold mineralization in diorite bodies. The surface low-to-low polarization (η ≥ 1.5%), medium-to-high resistivity (500–1000 Ω•m), and deep induced polarization sounding high polarization anomalies are a comprehensive reflection of the copper-gold mineralization.
[0025] Induced polarization sounding: The location of mineralized alteration zones shallower than 300m in shallow overburden areas was obtained using an induced polarization sounding system. The initial ABmax distance was set to 1200m, the initial power of the transmitting power source was set to 20kW, and the current was set to 6-10A to minimize the impact of low-resistivity shielding. As the thickness of the shallow overburden layer increased, or the influence of the overburden material on the geophysical data increased, the ABmax distance and the power of the transmitting power source were increased.
[0026] Four induced polarization sounding profiles were established, from east to west: CS08 (overburden 10-20m), CS00 (overburden 20-30m), CS31 (overburden 40-50m), and CS47 (overburden 50-60m). Regarding apparent polarizability, all values were <1%, and the apparent polarizability changed from "vertical stripes" to "sparse and scattered" from east to west. Regarding apparent resistivity, the high-resistivity top interface gradually deepened from east to west.
[0027] Well-to-ground charging method: A high-power induced polarization (IP) device was used to carry out a well-to-ground charging method. The data acquisition parameters were: working grid density 160×40, power supply point depth 475m, and three infinite poles in the north, south and east directions.
[0028] like Figure 5 , Figure 6 and Figure 7As shown, by employing a method of power supply excitation at the alteration zone location in the well and surface reception, polarizability anomaly zonation was obtained. The anomaly zones extend in a northwest direction, exceeding 1.5 km in length and 100-200 m in width, and their extent closely matches historical borehole verification results. Specifically, in the north- and south-direction power supply data sets, the northwest-trending high polarizability anomaly zone is located north of the high magnetic anomaly zone, with an apparent polarizability range of 6-11%.
[0029] Audio magnetotelluric sounding: Audio magnetotelluric sounding was conducted using the Aether magnetotelluric instrument. Supplementary measurements were taken southward along the induced polarization profile to further reflect the distribution range of the mineralized altered rock mass. The depth measurement was 30 meters, and the measurement point spacing was 40 meters.
[0030] Based on the geological characteristics and metallogenic regularity of the Karaoyi copper-gold deposit, a comprehensive analysis of the geophysical exploration results suggests that "weak polarizability (>0.8%) + high surface magnetic anomaly (ΔT>400nT) + high resistivity" are important prospecting indicators for the ore-bearing concealed rock mass in the area. Based on the analytical characteristics, the northwest-trending extension zone of the mining area is delineated.
[0031] S3. Conduct shallow drilling exploration verification of the prospecting target area, clarify the rock, mineralization alteration and geochemical characteristics of the mining area, and combine with rapid field analysis to further narrow down the prospecting target area, and carry out a second round of shallow drilling exploration verification.
[0032] S4. Combining the results of geophysical combined measurements and the results of the second round of shallow drilling geochemical exploration, we will conduct in-depth interpretation of each geophysical method, determine the exploration direction, and conduct a comprehensive analysis of each prospecting target area and mineralization potential in the shallow overburden area, and further screen the prospecting target areas.
[0033] Through shallow drilling, the thickness of the overburden layer ranges from 10 to 60 meters, with an average of about 26 meters.
[0034] Geochemical characteristics show that the Au content ranges from 0.79 to 431 × 10⁻⁶. -9 The average is 13.78 × 10 -9 Shallow drilling revealed that the lithology of the gold mineralization was mainly diorite, quartz diorite, and granodiorite, with pyrite appearing in granular or veinlet forms in some areas. The shallow drilling revealed that the gold mineralization was generally distributed within concealed diorite and granodiorite, trending northwest. Figure 8As shown in the figure, 1 represents the interpreted Beitashan Formation; 2 represents the Beitashan Formation; 3 represents quartz diorite; 4 represents diorite; 5 represents interpreted diorite; 6 represents alkali feldspar granite porphyry; 7 represents interpreted alkali feldspar granite porphyry; 8 represents interpreted granodiorite; 9 represents rhyolite porphyry; 10 represents the geological boundary; 11 represents the interpreted geological boundary; 12 represents the interpreted fault; 13 represents the Yuyitas copper-gold deposit; 14 represents Au ≥ 200 ppb; 15 represents Au: 100-200 ppb; 16 represents Au: 50-100 ppb; 17 represents Au: 10-50 ppb; 18 represents Au: 0-10 ppb.
[0035] Cu content ranges from 6.5 to 1020 × 10⁻⁶. -6 The average is 85.77 × 10 -6 The highest value is found in shallow hole IIQZ05, Cu: 1020 × 10⁻⁶. -6 The enrichment sites of Cu are similar to those of Au, mostly found in concealed diorite and granodiorite, and generally exhibit a northwest-trending banded distribution. Figure 9 As shown in the figure, 1 represents the interpreted Beitashan Formation; 2 represents the Beitashan Formation; 3 represents quartz diorite; 4 represents diorite; 5 represents interpreted diorite; 6 represents alkali feldspar granite porphyry; 7 represents interpreted alkali feldspar granite porphyry; 8 represents interpreted granodiorite; 9 represents rhyolite porphyry; 10 represents the geological boundary; 11 represents the interpreted geological boundary; 12 represents the interpreted fault; 13 represents the Yuyitas copper-gold deposit; 14 represents Cu: 1020 ppm; 15 represents Cu: 329 ppm; 16 represents Cu: 100-200 ppm; 17 represents Cu: 50-100 ppm; 18 represents Cu: 10-50 ppm; 19 represents Cu: 1-10 ppm.
[0036] With the aim of controlling concealed ore-bearing geological bodies, strike and dip control were implemented on the ore-bearing geological bodies (quartz diorite). Using Au ≥ 0.8 g / t and Cu ≥ 0.2% as boundary grades, the ore bodies were re-delineated using a limited extrapolation method. Six gold ore bodies were delineated, with lengths ranging from 160 to 480 meters and controlled depths of 80 to 220 meters, with an average Au grade of 2.18 g / t; twelve copper ore bodies were delineated, with lengths ranging from 160 to 800 meters and controlled depths of 80 meters, with an average Cu grade of 0.31%; and six gold-copper ore bodies were delineated, with a length of 160 meters and a controlled depth of 80 meters.
[0037] S5. Conduct in-depth verification of the screened mineral exploration target areas. For example... Figure 10The image shows the borehole alteration zoning map of the Karaoyi mining area. According to the porphyry copper-gold deposit alteration zoning, it can be divided from top to bottom into the propylitic alteration zone, the quartz-sericite alteration zone, and the silicification zone. The propylitic alteration (chloritization-epidote alteration-carbonatization) is mainly distributed on the outermost side, with alteration mineral assemblages of chlorite, epidote, calcite, and fine-grained pyrite. Within this alteration zone, biotite in the common host rocks and quartz diorite is transformed into chlorite, and plagioclase is transformed into chlorite, calcite, and sericite minerals. The quartz-sericite alteration zone (silicification-sericite alteration-epidote alteration-pyrite alteration-chalcopyrite alteration) is mainly distributed in the upper and middle parts of the borehole, within quartz diorite and monzodiorite. The alteration is intense, with alteration minerals primarily consisting of quartz, sericite, pyrite, and a small amount of chalcopyrite. Minor copper-gold mineralization is also present. In this alteration zone, quartz often forms veins filling the fissures of the ore-bearing rocks, creating quartz veins, pyrite-quartz veins, chalcopyrite-quartz veins, and isolated chalcopyrite veinlets. Sericitization often occurs alongside silicification, located within or at the edges of quartz veins. The silicification zone (silicification-sericite alteration-pyrite alteration-chalcopyrite alteration) is the alteration zone most closely related to copper-gold mineralization in the area. It is mainly distributed in the lower part of the borehole within quartz diorite and monzodiorite, exhibiting intense alteration. The alteration minerals are primarily quartz, sericite, pyrite, and chalcopyrite, making it the main ore-bearing zone for copper-gold mineralization. In this alteration zone, quartz generally occurs as veinlets or reticulate veins filling the fissures of the ore-bearing rocks, forming individual quartz veins, quartz-pyrite and chalcopyrite veins, or quartz-molybdenite veins. Sericite mostly occurs as fine veinlets or irregularly replaces feldspar, and the alteration is pink to flesh-colored. Verification shows that the shallowly overburdened area of this region has good potential for copper-gold deposits.
[0038] Therefore, the present invention adopts the above-mentioned method for metal ore prospecting in shallowly covered areas. By gradually narrowing the prospecting range in shallowly covered areas, the blindness of deep drilling is avoided, the amount of ineffective exploration work is greatly reduced, the prospecting cost is lowered, and the prospecting efficiency is improved.
[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.
Claims
1. A method for prospecting for metallic minerals in shallowly covered areas, characterized in that, Including the following steps: S1. Obtain geological data of shallowly covered areas, analyze the geological data, and preliminarily select mineralized prospective areas in shallowly covered areas; S2. For the initially delineated shallow-cover mineralized prospective areas, delineate the prospecting target areas using a combination of geophysical exploration methods. S3. Conduct shallow drilling exploration in the prospecting target area to further narrow down the prospecting target area, and carry out a second round of shallow drilling exploration. S4. Combining the results of geophysical combined measurements and the results of the second round of shallow drilling geochemical exploration, we will conduct in-depth interpretation of each geophysical method, determine the exploration direction, and conduct a comprehensive analysis of each prospecting target area and mineralization potential in the shallow overburden area, and further screen the prospecting target areas. S5. Conduct in-depth verification of the selected mineral exploration target areas.
2. The method for prospecting for metal deposits in shallowly covered areas according to claim 1, characterized in that, Step S1 specifically includes: Geological data of shallowly covered areas are obtained, and the material composition, cover thickness, scale, metallogenic geological background and metallogenic conditions of shallowly covered areas are analyzed. The characteristics of ore deposits, metallogenic processes and ore-controlling elements are extracted, and the metallogenic regularity and metallogenic specificity are summarized. Among them, the characteristics of ore deposits include ore-bearing rocks, ore-controlling structures and mineralization alteration. Based on the metallogenic regularity, metallogenic exclusivity, and geological conditions within the region, prospective metallogenic areas in shallowly covered areas surrounding known mining areas are initially selected according to the direction of regional tectonic lines and the extension direction of ore bodies.
3. The method for prospecting for metal deposits in shallowly covered areas according to claim 1, characterized in that: The geophysical exploration combination method includes magnetic surveying, induced polarization profiling, induced polarization sounding, well-to-ground charging method, and audio-frequency magnetotelluric sounding. By analyzing the outliers of each method, the prospecting target area is delineated comprehensively.
4. A method for prospecting for metal deposits in shallowly covered areas according to claim 2, characterized in that: The magnetic survey employs a small-to-medium scale measurement method to measure the planar distribution range of the ore body in the mining area and determine the dip of the ore body within 500 meters of the shallow overburden area.
5. A method for prospecting for metal deposits in shallowly covered areas according to claim 2, characterized in that: The induced polarization profile was obtained using a medium-to-large scale measurement method. Based on the ground power supply mode and the shallow well power supply mode, the apparent polarization data of the mining area was obtained. By analyzing the apparent resistivity and maximum value in the apparent polarization data, the apparent polarization profile information of the shallow cover area was obtained.
6. A method for prospecting for metal deposits in shallowly covered areas according to claim 2, characterized in that: The induced polarization sounding uses an induced polarization sounding scale device to obtain the location of the mineralized alteration zone within 300m of the shallow overburden area. The initial ABmax is set to 1200m, the initial power of the transmitting power source is set to 20KW, and the current is set to 6-10A. If the thickness of the shallow overburden layer increases, the ABmax distance and the power of the transmitting power source are increased.
7. A method for prospecting for metal deposits in shallowly covered areas according to claim 2, characterized in that: The well-to-ground charging method employs a high-power induced polarization device, which uses power supply to excite the alteration zone in the well and receives the signal on the surface to obtain the shallow polarization anomaly zoning of the shallow cover area at a depth of 500m.
8. A method for prospecting for metal deposits in shallowly covered areas according to claim 1, characterized in that, Step S3 specifically involves: conducting shallow drilling exploration verification of the prospecting target area, clarifying the rock, mineralization alteration and geochemical characteristics within the mining area, combining rapid field analysis to further narrow down the prospecting target area, and carrying out a second round of shallow drilling exploration verification.