Lithium ore exploration method based on carbonate rock tectonic environment

Abstract

The present invention relates to the technical field of mineral exploration, and provides a lithium ore exploration method based on a carbonate rock tectonic environment. The lithium ore exploration method based on a carbonate rock tectonic environment includes: conducting geophysical exploration on a lithium-bearing target area to obtain geophysical exploration results; based on the geophysical exploration results, determining the position information of the lithium-bearing layer and the position information of the water-conducting structure area; arranging boreholes along the water-conducting structure area for sampling to obtain sampling results; based on the sampling results, determining the position of the lithium-bearing area, fully considering the enrichment distribution of lithium in the coal measures of the carbonate platform and the characteristics of ore-forming control factors, improving the control degree and exploration efficiency of the scope boundary of the lithium-bearing area under the carbonate rock tectonic environment, and reducing the exploration cost.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral exploration, and particularly to a lithium ore exploration method based on a carbonate rock tectonic environment. Background Art

[0002] A carbonate platform is a very large and flat shoal, often submerged by very shallow tidal seawater, surrounded by steep slopes and deep sea, and there is land connected to the platform by low islands. Carbonate platforms often develop on shallow-bottom volcanoes, immature clastic rocks and evaporites, or more mature continental clastic rocks. In the upper intertidal zone to the supratidal zone, due to the extremely shallow water cover and weak tidal currents, halophytic plants similar to modern mangroves in terms of ecology reproduce and grow on it, and after death, peat accumulates, thus forming coal seams. The coal-bearing strata of carbonate platforms are widely distributed in provinces such as Yunnan, Guangxi, and Guizhou in China.

[0003] On the weathered crusts of the coal-bearing strata of carbonate platforms and the underlying carbonate rocks in provinces such as Yunnan, Guangxi, and Guizhou in China, weathered clay-type lithium deposits are widely distributed. The lithium-bearing minerals are mainly lithium chlorite, and the lithium oxide grade can reach more than 1%, which is a new type of lithium deposit.

[0004] At present, the exploration of this coal-bearing lithium deposit generally only uses drilling exploration. The layout of drill holes generally adopts a uniform grid layout within the exploration range. The grid spacing generally adopts 100 - 200m, and the drill hole depth is generally designed to penetrate the target horizon and reach the underlying strata of the target isobar. The discovery of this type of lithium deposit is currently mainly based on ore spots, and there is no efficient exploration method specifically for this type of lithium deposit, resulting in low exploration efficiency and high exploration cost for this type of lithium deposit. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the related art. For this purpose, the present invention provides a lithium ore exploration method based on a carbonate rock tectonic environment, which improves the exploration efficiency of lithium ore in a carbonate rock tectonic environment and reduces the exploration cost.

[0006] According to an embodiment of the present invention, the lithium ore exploration method based on a carbonate rock tectonic environment includes:

[0007] Conduct geophysical exploration on the lithium-bearing target area to obtain geophysical exploration results;

[0008] Based on the geophysical exploration results, determine the position information of the lithium-bearing layer and the position information of the water-conducting structure area;

[0009] Layout drill holes along the water-conducting structure area for sampling to obtain sampling results;

[0010] Based on the sampling results, determine the position of the lithium-bearing area.

[0011] According to the lithium ore exploration method based on the carbonate rock tectonic environment according to an embodiment of the present invention, based on the geophysical exploration results, determining the position information of the lithium-bearing layer and the position information of the water-conducting structure area includes:

[0012] Based on the geophysical exploration results, determining the position information of the lithium-bearing layer within the lithium-bearing target area;

[0013] Based on the geophysical exploration results and the position information of the lithium-bearing layer, determining the position information of the water-conducting structure area within the lithium-bearing layer.

[0014] According to the lithium ore exploration method based on the carbonate rock tectonic environment according to an embodiment of the present invention, based on the geophysical exploration results, determining the position information of the lithium-bearing layer within the lithium-bearing target area includes:

[0015] Based on the geophysical exploration results, drawing a resistivity profile of the lithium-bearing target area;

[0016] Based on the enrichment genetic mechanism of lithium ore, the occurrence horizon, and the geophysical characteristics of the lithium-bearing layer, and in combination with the resistivity profile, determining the position information of the lithium-bearing layer.

[0017] According to the lithium ore exploration method based on the carbonate rock tectonic environment according to an embodiment of the present invention, based on the geophysical exploration results and the position information of the lithium-bearing layer, determining the position information of the water-conducting structure area within the lithium-bearing layer includes:

[0018] Obtaining the target position information corresponding to when the resistivity in the resistivity profile satisfies a first preset condition, and using the target position information as the position information of the water-conducting structure area, where the first preset condition is that the resistivity change amplitude is greater than a preset amplitude threshold.

[0019] According to the lithium ore exploration method based on the carbonate rock tectonic environment according to an embodiment of the present invention, based on the enrichment genetic mechanism of lithium ore, the occurrence horizon, and the geophysical characteristics of the lithium-bearing layer, and in combination with the resistivity profile, determining the position information of the lithium-bearing layer includes:

[0020] Based on the enrichment genetic mechanism of lithium ore, the occurrence horizon, and the geophysical characteristics of the lithium-bearing layer, determining a first resistivity threshold of the lithium-bearing layer;

[0021] Using the position information corresponding to the resistivity less than the first resistivity threshold in the resistivity profile as the position information of the lithium-bearing layer.

[0022] According to the lithium ore exploration method based on the carbonate rock tectonic environment according to an embodiment of the present invention, before conducting geophysical exploration on the lithium-bearing target area, the method further includes:

[0023] Obtain historical geological data of the area to be explored, and based on the historical geological data, determine the lithium-bearing target area.

[0024] According to the lithium ore exploration method based on the carbonate rock tectonic environment in the embodiments of the present invention, the determining the lithium-bearing target area based on the historical geological data includes:

[0025] Based on the historical geological data of the area to be explored, determine the lithological characteristics and physical properties of carbonate rocks in the area to be explored;

[0026] Based on the lithological characteristics and physical properties of carbonate rocks, determine the carbonate rock target area, and use the carbonate rock target area as the lithium-bearing target area.

[0027] According to the lithium ore exploration method based on the carbonate rock tectonic environment in the embodiments of the present invention, the method further includes:

[0028] Obtain the depths of lithium-bearing drill holes and non-lithium-bearing drill holes;

[0029] Arrange new drill holes for sampling between the depths of the lithium-bearing drill holes and the non-lithium-bearing drill holes to determine the boundary of the lithium-bearing area.

[0030] According to the lithium ore exploration method based on the carbonate rock tectonic environment in the embodiments of the present invention, the arranging new drill holes for sampling between the depths of the lithium-bearing drill holes and the non-lithium-bearing drill holes includes:

[0031] Set the first drill hole for sampling at the middle position between the depths of the lithium-bearing drill hole and the non-lithium-bearing drill hole;

[0032] When the lithium content in the first drill hole is greater than the preset lithium content threshold, arrange new drill holes for sampling at the middle position between the first drill hole and the depth of the non-lithium-bearing drill hole;

[0033] When the lithium content in the first drill hole is less than the preset lithium content threshold, arrange new drill holes for sampling at the middle position between the first drill hole and the depth of the lithium-bearing drill hole;

[0034] Repeat the step of arranging new drill holes for sampling between the depths of the lithium-bearing drill hole and the non-lithium-bearing drill hole until the lithium content in the new drill hole is equal to the preset lithium content threshold.

[0035] According to the lithium ore exploration method based on the carbonate rock tectonic environment in the embodiments of the present invention, the drill hole density near the water-conducting structure area is greater than that far from the water-conducting structure area.

[0036] One or more of the above technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0037] The lithium ore exploration method based on the carbonate rock tectonic environment provided by the present invention obtains geophysical exploration results by conducting geophysical exploration on the lithium-bearing target area; based on the geophysical exploration results, determines the position information of the lithium-bearing layer and the position information of the water-conducting structure area; arranges boreholes along the water-conducting structure area for sampling to obtain sampling results; based on the sampling results, determines the position of the lithium-bearing area, fully considering the enrichment distribution of lithium in the coal measures of the carbonate platform and the characteristics of ore-forming control factors, improves the control degree of the boundary of the lithium-bearing area range and the exploration efficiency, and reduces the exploration cost.

[0038] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0040] Figure 1 is a flowchart of the lithium ore exploration method based on the carbonate rock tectonic environment provided by an embodiment of the present invention Figure 1 ;

[0041] Figure 2 is a schematic vertical distribution diagram of lithium in the coal measures of a certain carbonate platform provided by an embodiment of the present invention;

[0042] Figure 3 is a flowchart of the lithium ore exploration method based on the carbonate rock tectonic environment provided by an embodiment of the present invention Figure 2 ;

[0043] Figure 4 is a schematic layout diagram of boreholes provided by an embodiment of the present invention.

[0044] Reference numerals:

[0045] 1, water-conducting structure area; 2, borehole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0047] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the embodiments of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0048] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0049] In the embodiments of the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely means that the first feature has a lower horizontal height than the second feature.

[0050] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0051] An embodiment of one aspect of the present invention, in combination with Figures 1 to 4As shown, a lithium ore exploration method based on the carbonate rock tectonic environment is provided. Geophysical exploration is carried out on the lithium-bearing target area to obtain geophysical exploration results. Based on the geophysical exploration results, the position information of the lithium-bearing layer and the position information of the water-conducting structure area are determined. Boreholes are arranged along the water-conducting structure area for sampling to obtain sampling results. Based on the sampling results, the position of the lithium-bearing area is determined, fully considering the enrichment distribution of coal-bearing lithium in carbonate platforms and the characteristics of ore-forming control factors, improving the control degree of the boundary of the lithium-bearing area range and the exploration efficiency, and reducing the exploration cost.

[0052] According to an embodiment provided by the present invention, referring to Figure 1 As shown, the method includes:

[0053] 110: Carry out geophysical exploration on the lithium-bearing target area to obtain geophysical exploration results;

[0054] The lithium-bearing target area, that is, the lithium-bearing prospective area, can be determined by obtaining the historical geological data of the area to be explored and based on the historical geological data.

[0055] Optionally, the above historical geological data may include: historical geological materials and historical coalfield borehole materials of the area to be explored. The historical geological materials may include original geological materials, result geological materials, and physical geological materials. Among them, the original geological materials and result geological materials are materials such as texts, charts, and audio-visual materials formed in early geological work, and the physical geological materials are physical objects such as rock cores, various specimens of geology, polished thin sections, and samples. By analyzing the above historical geological materials and historical coalfield borehole materials, the geological evolution history of the area to be explored can be obtained, and then the environmental structure and lithium ore structure of the area to be explored can be obtained, further narrowing the exploration scope in the area to be explored and determining the lithium-bearing target area.

[0056] Optionally, according to an embodiment of the present invention, a method for determining a lithium-bearing target area based on historical geological data may include:

[0057] Based on the historical geological data of the area to be explored, determine the carbonate rock lithological characteristics and carbonate rock physical properties characteristics of the area to be explored;

[0058] Based on the carbonate rock lithological characteristics and the carbonate rock physical properties characteristics, determine the carbonate rock target area and determine the carbonate rock target area as the lithium-bearing target area.

[0059] Specifically, by analyzing the historical geological data and historical coalfield borehole data of the above-mentioned area to be explored, the lithological characteristics and physical properties of carbonate rocks in the area to be explored can be determined. By analyzing the above-mentioned lithological characteristics and physical properties of carbonate rocks, the corresponding stages of different types of carbonate rocks can be determined, and then the historical geological evolution of the area to be explored can be determined. Combining the historical geological data, historical coalfield borehole data and geological evolution history, a lithium-bearing target area, i.e., a lithium-bearing prospective area, that may contain lithium can be preliminarily determined in the area to be explored.

[0060] Figure 2 Schematic diagram of the vertical distribution of lithium in the coal series of a carbonate platform, combined with Figure 2 As shown, optionally, the above-mentioned lithological characteristics of carbonate rocks, that is, the types of carbonate rocks, may include: limestone, marble, dolomite, dolomite marble, marl, etc.; the above-mentioned physical properties of carbonate rocks may include: density characteristics, magnetic characteristics, electrical characteristics, thermal conductivity characteristics, radioactive characteristics, and seismic wave propagation characteristics, etc. The density characteristics may be the densities of different types of carbonate rocks or the densities of strata in different stages. The magnetic characteristics may be the magnetism of different types of carbonate rocks, including magnetic susceptibility, remanent magnetization intensity, etc. The electrical characteristics may include the signal-to-noise ratio, natural gamma value, and resistivity of carbonate rocks.

[0061] Specifically, after determining the lithium-bearing target area, geophysical exploration is carried out on the lithium-bearing target area. Corresponding to the physical properties of carbonate rocks, the geophysical exploration methods may be at least one of exploration methods such as gravity exploration, magnetic exploration, electrical exploration, seismic exploration, geothermal exploration, nuclear exploration, and three-dimensional seismic exploration.

[0062] Among them, electrical exploration is an exploration method for understanding the underground strata and rocks by observing the conductivity differences of different rocks, including resistivity geophysical exploration methods. Since the lithium-bearing ore layer in the coal series of the carbonate platform is generally a bauxite or claystone layer with a thickness of several meters, the resistivity of the lithium-bearing layer formed by bauxite-claystone is generally below 150 Ω·m, and the surrounding rock of the lithium-bearing layer is limestone, whose resistivity is above 1000 Ω·m. The resistivity difference between the lithium-bearing layer and the surrounding rock is more than 10 times. Based on the obvious resistivity difference between the lithium-bearing layer and the surrounding rock, using the resistivity geophysical exploration method to preliminarily explore the depth and position range of the lithium-bearing ore layer has a geophysical premise.

[0063] Furthermore, the resistivity method can be divided into frequency domain, time domain, and direct current method. These detection methods have their own advantages for different geological problems and purposes.

[0064] Among them, the time-domain resistivity method, namely the transient electromagnetic method, is a method that uses an ungrounded loop or a grounded current source to emit a primary pulsed magnetic field into the ground, and uses a coil or a grounded electrode to observe the secondary induced eddy current field in the underground medium during the intermittent period of the primary pulsed magnetic field, so as to detect the resistivity of the medium. Its basic working method is as follows: A transmitting coil with a certain waveform current is set on the ground or in the air, so as to generate a primary electromagnetic field in the surrounding space and generate an induced current in the underground conductive rock ore body. After the power is cut off, the induced current decays with time due to heat loss. By measuring the variation law of the secondary field with time in each time period after the power is cut off, the geoelectric characteristics at different depths can be obtained. It has high construction efficiency, pure secondary field observation, is sensitive to low-resistance bodies, is suitable for finding low-resistance geological bodies in high-resistance surrounding rocks, is less affected by terrain, has strong resolution ability, and the profile measurement and sounding work can be completed at the same time, providing more useful information for geological exploration. Therefore, the geophysical method adopted in the embodiments of the present invention is preferably the time-domain resistivity method.

[0065] 120: Based on the geophysical exploration results, determine the position information of the lithium-bearing layer and the position information of the water-conducting structure area;

[0066] Optionally, a method for determining the position information of the lithium-bearing layer and the position information of the water-conducting structure area according to the geophysical exploration results is as follows:

[0067] Based on the geophysical exploration results, determine the position information of the lithium-bearing layer in the lithium-bearing target area; then, based on the geophysical exploration results and the position information of the lithium-bearing layer, determine the position information of the water-conducting structure area in the lithium-bearing layer.

[0068] Specifically, a method for determining the position information of the lithium-bearing layer based on the geophysical exploration results may include:

[0069] Based on the geophysical exploration results, draw a resistivity profile of the lithium-bearing target area;

[0070] Based on the enrichment genetic mechanism of lithium ore, the occurrence horizon, and the geophysical characteristics of the lithium-bearing layer, and in combination with the resistivity profile, determine the position information of the lithium-bearing layer.

[0071] Among them, based on the enrichment genetic mechanism of lithium ore, the occurrence horizon, and the geophysical characteristics of the lithium-bearing layer, and in combination with the resistivity profile, determining the position information of the lithium-bearing layer includes: based on the enrichment genetic mechanism of lithium ore, the occurrence horizon, and the geophysical characteristics of the lithium-bearing layer, determine the first resistivity threshold of the lithium-bearing layer;

[0072] Take the position information corresponding to the resistivity less than the first resistivity threshold in the resistivity profile as the position information of the lithium-bearing layer.

[0073] Since the lithium-bearing ore layer in the carbonate platform coal measure is generally a bauxite or claystone layer with a thickness of several meters, the resistivity of the lithium-bearing layer formed by bauxite-claystone is generally below 150 Ω·m. The surrounding rock of the lithium-bearing layer is limestone, and its resistivity is above 1000 Ω·m. The resistivity difference between the lithium-bearing layer and the surrounding rock is more than 10 times. Therefore, the area with a resistivity less than the first resistivity threshold (for example, 200 Ω·m) can be determined as the area corresponding to the lithium-bearing layer, and the depth and location of the lithium-bearing layer can be preliminarily determined.

[0074] Optionally, a method for determining the location information of the water-conducting structure area in the lithium-bearing layer based on the geophysical exploration results and the location information of the lithium-bearing layer includes:

[0075] Based on the geophysical exploration results, draw a resistivity profile.

[0076] Obtain the target location information corresponding to when the resistivity in the resistivity profile meets the first preset condition, and use the target location information as the location information of the water-conducting structure area, where the first preset condition is that the resistivity change amplitude is greater than the preset amplitude threshold.

[0077] Since the water-conducting structures in geological structures are mainly fault structures, based on the structural characteristics of different geological structures, different geological structures show different performances in the resistivity profile. For example, the resistivity of a fault structure shows abnormal discontinuity in the resistivity profile. Specifically, it can be assisted by judging whether the resistivity change amplitude is greater than the preset amplitude threshold. If the resistivity change amplitude at a certain place is greater than the preset amplitude threshold, it can be judged that this place is probably located in the fault structure.

[0078] 130: Layout boreholes along the water-conducting structure area for sampling to obtain sampling results.

[0079] The latest research shows that the lithium-bearing carrier mineral, lithium chlorite, in the carbonate platform coal measure lithium deposit is post-genetic and may be formed by the reaction of kaolin or its derivative minerals with a Li-rich solution during the diagenetic process. The enrichment of coal measure lithium is closely related to the recharge source of its lithium element. The water-conducting structures in geological structures, such as fault structures, have an obvious controlling effect on the extraordinary enrichment of lithium in the carbonate platform coal measure. Especially in the carbonate platform coal measure strata, there are obvious electrical property differences between the water-conducting structures and the surrounding rocks. Using the resistivity geophysical exploration method, there is a geophysical premise for finding water-conducting fault structures in the carbonate platform coal measure strata.

[0080] Such as Figure 3As shown, based on the above geophysical exploration data, in combination with coalfield exploration data and ore-forming control conditions, exploration boreholes are arranged. For example, a number of boreholes 2 can be arranged along the strike of the water-conducting structure area 1 for detection, or a number of boreholes 2 can be arranged within a certain distance around the water-conducting structure area 1 for detection. The layout density of the boreholes 2 can be adjusted according to the distance from the water-conducting structure area 1. The density of the boreholes 2 closer to the water-conducting structure area 1 is greater than that of the boreholes 2 farther away from the water-conducting structure area 1. That is, at the position closer to the water-conducting structure area 1, the corresponding density of the boreholes 2 can be appropriately increased. By increasing the layout density of the boreholes 2 in the water-conducting structure area 1, the position control degree of the lithium-bearing area can be improved. At the position farther away from the water-conducting structure area 1, the layout density of the boreholes 2 is reduced, unnecessary boreholes are reduced, and the exploration cost is lowered.

[0081] 140: Based on the sampling results, determine the location of the lithium-bearing area.

[0082] Specifically, in order to improve the accuracy and efficiency of detecting the lithium-bearing area, as Figure 4 shown, the method may include:

[0083] 410: Obtain the depths of the lithium-bearing boreholes and the non-lithium-bearing boreholes;

[0084] 420: Arrange new boreholes for sampling between the depths of the lithium-bearing boreholes and the non-lithium-bearing boreholes to determine the boundary of the lithium-bearing area.

[0085] According to the lithium ore exploration method based on the carbonate rock tectonic environment of the embodiments of the present invention, the method of arranging new boreholes for sampling between the depths of the lithium-bearing boreholes and the non-lithium-bearing boreholes may include:

[0086] Set a first borehole for sampling at the middle position between the depth of the lithium-bearing borehole and the depth of the non-lithium-bearing borehole;

[0087] When the lithium content in the first borehole is greater than the preset lithium content threshold, arrange new boreholes for sampling at the middle position between the first borehole and the depth of the non-lithium-bearing borehole;

[0088] When the lithium content in the first borehole is less than the preset lithium content threshold, arrange new boreholes for sampling at the middle position between the first borehole and the depth of the lithium-bearing borehole;

[0089] Repeat the step of arranging new boreholes for sampling between the depths of the lithium-bearing boreholes and the non-lithium-bearing boreholes until the lithium content of the new borehole is equal to the preset lithium content threshold.

[0090] It is easy to understand that the boundary of the lithium-bearing area is determined by continuously arranging new boreholes for sampling at the midpoint between the depth of the lithium-bearing boreholes and the depth of the non-lithium-bearing boreholes. For example, based on the existing data, existing mineralized boreholes (such as lithium-bearing boreholes in coalfields) can be identified. The vertical distances from the existing lithium-bearing boreholes and non-lithium-bearing boreholes to the fault are measured, and new boreholes are arranged in the middle. Core samples are taken from the target layer and tested to see if they are mineralized. If they are not mineralized, that is, the lithium content in the first borehole is less than the preset lithium content threshold, new boreholes are continuously arranged between the first borehole and the lithium-bearing borehole until a mineralized borehole close to the industrial grade appears. If the newly arranged first borehole hits a mineralized hole, new boreholes are arranged between the newly arranged first borehole and the non-lithium-bearing borehole for sampling until the lithium content in the core of the new borehole is close to the industrial grade or the preset lithium content threshold. The distance from the lithium-bearing borehole that just reaches the industrial product to the fault is measured. Since the weathered crust of the regional basement carbonate rock is relatively stable, the area controlled by this distance can be considered as the lithium-bearing area controlled by this fault, and the position of the lithium-bearing area can be delineated accordingly.

[0091] An embodiment of the present invention provides a lithium ore exploration method based on the carbonate rock tectonic environment. Geophysical exploration is carried out on the lithium-bearing target area to obtain geophysical exploration results. Based on the geophysical exploration results, the position information of the lithium-bearing layer and the position information of the water-conducting structure area are determined. Boreholes are arranged along the water-conducting structure area for sampling to obtain sampling results. Based on the sampling results, the position of the lithium-bearing area is determined, fully considering the enrichment distribution of lithium in the coal measures of the carbonate platform and the characteristics of ore-forming control factors, improving the control degree of the boundary of the lithium-bearing area range and the exploration efficiency, and reducing the exploration cost.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lithium ore exploration method based on carbonate rock tectonic environment, characterized in that, Including: Conduct geophysical exploration on the lithium-bearing target area to obtain geophysical exploration results; Based on the geophysical exploration results, determine the position information of the lithium-bearing layer and the position information of the water-conducting structure area; Arrange boreholes along the water-conducting structure area for sampling to obtain sampling results; Based on the sampling results, determine the position of the lithium-bearing area.

2. The lithium ore exploration method based on the carbonate rock tectonic environment according to claim 1, wherein The determining the position information of the lithium-bearing layer and the position information of the water-conducting structure area based on the geophysical exploration results includes: Based on the geophysical exploration results, determine the position information of the lithium-bearing layer within the lithium-bearing target area; Based on the geophysical exploration results and the position information of the lithium-bearing layer, determine the position information of the water-conducting structure area within the lithium-bearing layer.

3. The lithium ore exploration method based on the carbonate rock tectonic environment according to claim 2, wherein The determining the position information of the lithium-bearing layer within the lithium-bearing target area based on the geophysical exploration results includes: Based on the geophysical exploration results, draw the resistivity profile of the lithium-bearing target area; Based on the enrichment genetic mechanism, occurrence horizon of lithium ore and the geophysical characteristics of the lithium-bearing layer, combined with the resistivity profile, determine the position information of the lithium-bearing layer.

4. The lithium ore exploration method based on the carbonate rock tectonic environment according to claim 3, characterized in that The determining the position information of the water-conducting structure area within the lithium-bearing layer based on the geophysical exploration results and the position information of the lithium-bearing layer includes: Obtain the target position information corresponding to when the resistivity in the resistivity profile meets the first preset condition, and use the target position information as the position information of the water-conducting structure area, where the first preset condition is that the resistivity change amplitude is greater than the preset amplitude threshold.

5. The lithium ore exploration method based on the carbonate rock tectonic environment according to claim 3, wherein, The determining the position information of the lithium-bearing layer based on the enrichment genetic mechanism, occurrence horizon of lithium ore and the geophysical characteristics of the lithium-bearing layer, combined with the resistivity profile, includes: Based on the enrichment genetic mechanism, occurrence horizon of lithium ore and the geophysical characteristics of the lithium-bearing layer, determine the first resistivity threshold of the lithium-bearing layer; Use the position information corresponding to the resistivity less than the first resistivity threshold in the resistivity profile as the position information of the lithium-bearing layer.

6. The lithium ore exploration method based on the carbonate rock tectonic environment according to any one of claims 1-5, characterized in that, Before conducting geophysical exploration on the lithium-bearing target area, the method further includes: Obtain the historical geological data of the area to be explored, and based on the historical geological data, determine the lithium-bearing target area.

7. The lithium ore exploration method based on the carbonate rock tectonic environment according to claim 6, characterized in that, The determining the lithium-bearing target area based on the historical geological data includes: Based on the historical geological data of the area to be explored, determine the carbonate lithological characteristics and carbonate physical properties of the area to be explored; Based on the carbonate lithological characteristics and the carbonate physical properties, determine the carbonate target area, and use the carbonate target area as the lithium-bearing target area.

8. The lithium ore exploration method based on the carbonate rock tectonic environment according to any one of claims 1-5, characterized in that, The method further includes: Obtain the depth of the lithium-bearing borehole and the depth of the non-lithium-bearing borehole; Arrange new boreholes for sampling between the depth of the lithium-bearing borehole and the depth of the non-lithium-bearing borehole to determine the boundary of the lithium-bearing area.

9. The lithium ore exploration method based on the carbonate rock tectonic environment according to claim 8, characterized in that, The arranging new boreholes for sampling between the depth of the lithium-bearing borehole and the depth of the non-lithium-bearing borehole includes: Set the first borehole for sampling at the middle position between the depth of the lithium-bearing borehole and the depth of the non-lithium-bearing borehole; In the case where the lithium content in the first borehole is greater than the preset lithium content threshold, arrange new boreholes for sampling at the middle position between the first borehole and the depth of the non-lithium-bearing borehole; In the case that the lithium content in the first drill hole is less than the preset lithium content threshold, a new drill hole is arranged for sampling at the middle position of the depths of the first drill hole and the lithium-bearing drill hole; Repeat the step of arranging a new drill hole for sampling between the depths of the lithium-bearing drill hole and the lithium-free drill hole until the lithium content in the new drill hole is equal to the preset lithium content threshold.

10. The lithium ore exploration method based on carbonate rock tectonic environment according to any one of claims 1-5, characterized in that, The drill hole density near the water-conducting structure area is greater than that far from the water-conducting structure area.

Images