Method for constructing mineralization mode of anticlinal structure fracture pore type brine lithium deposit

Abstract

The invention discloses a method for constructing a mineralization mode of an anticline structure fracture pore type brine lithium ore deposit. The method comprises the steps that existing exploration and research data of the known anticline structure fracture pore type brine lithium ore deposit are collected and arranged; analyzing and determining basic elements of mineralization of the known anticline structure fracture pore type brine lithium deposit; carrying out field geological survey and sample collection on the known anticline structure fracture pore type brine lithium ore deposit; determining metallogenic mode elements by utilizing analysis test data and field survey data; and comprehensive research is carried out to construct the mineralization mode of the known anticline structure fracture pore type brine lithium ore deposit. The method can effectively determine the key geological information of the mineralization of the anticlinal structure fracture pore type brine lithium deposit, simulates the geological process of the mineralization of the anticlinal structure fracture pore type brine lithium deposit, and is constructed for a known typical anticlinal structure fracture pore type brine lithium deposit mineralization mode for the first time.

Description

Technical Field

[0001] The present invention belongs to the field of salt lake geology, and in particular relates to a method for constructing a mineralization model for anticline structure fissure-pore type brine lithium deposits. Background Art

[0002] Lithium, as a strategic key metal mineral, is a key mineral in the important new energy sector. Against the backdrop of the vigorous development of new energy, the development and utilization of lithium resources is essential. Currently, the level of investigation and research on anticline structural fissure-pore-type brine lithium resources in my country is relatively low. The vast majority of anticline structural fissure-pore-type brine lithium deposits were discovered and studied to a limited extent during the exploration, investigation, and research of boron and potassium minerals, which are urgently needed by the country. Given the current low level of research on lithium resources in my country, a mineralization model is being constructed for existing anticline structural fissure-pore-type brine lithium resource deposits in order to guide future exploration and development of anticline structural fissure-pore-type brine lithium resources. Anticline structural fissure-pore-type brine lithium resources currently represent the lithium resource with the greatest potential in my country. No dedicated mineralization model for anticline structural fissure-pore-type brine lithium resources has been established, and the construction of a mineralization model for this type of lithium resource is of great significance. Moreover, there are currently no separate anticline structure fissure-pore type brine lithium deposits in my country. Anticline structure fissure-pore type brine lithium deposits are often associated with boron and potassium mineral resources.

[0003] Therefore, it is very necessary to conduct research on the mineralization geological background, ore-controlling structure, ore-bearing anticline structural strata, structural characteristics and salt deposition characteristics, distribution characteristics of brine-type lithium deposits, and the potential of brine-type lithium deposit resources in anticline structural areas for typical anticline structural fissure-pore brine lithium deposits, to construct a mineralization model for anticline structural fissure-pore brine lithium deposits and guide the prospecting of anticline structural fissure-pore brine lithium deposits. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for constructing a mineralization model for anticline structure fissure-pore type brine lithium deposits, which can effectively determine the key geological information of the mineralization of anticline structure fissure-pore type brine lithium deposits, simulate the geological process of anticline structure fissure-pore type brine lithium mineralization, and construct a mineralization model for a known typical anticline structure fissure-pore type brine lithium deposit for the first time.

[0005] To achieve the above object, the present invention provides a method for constructing a mineralization model for anticline structure fracture-pore type brine lithium deposits, comprising:

[0006] Collect and organize existing exploration and research data on known anticline structural fracture-pore brine lithium deposits;

[0007] Analyze and determine the basic elements of mineralization of the known anticline structural fissure-pore brine lithium deposit;

[0008] Conducting field geological surveys and sample collection on the known anticline structure fracture-pore type brine lithium deposit;

[0009] Determine the elements of metallogenic model using analytical test data and field survey information;

[0010] Comprehensive research is conducted to construct the mineralization model of the known anticline structure fissure-pore brine lithium deposit.

[0011] Preferably, the process of collecting and collating existing exploration and research data on known anticline structural fracture-pore type brine lithium deposits includes:

[0012] Collect the mineralization geological background, geological characteristics of the deposit, hydrogeological characteristics of the mining area, sedimentary structure, sedimentary environment, mineralization conditions, mineralization controlling factors, and lake basin evolution of the ore deposit.

[0013] Preferably, the basic elements include: geological characteristics of the ore deposit, mineralization era, tectonic environment, mineralization structure, brine storage characteristics, material sources, physical and chemical conditions, lake basin evolution and geological effects.

[0014] Preferably, the process of conducting field geological survey and sample collection for the known anticline structure fracture-pore type brine lithium deposit includes: conducting regional metallogenic geological background survey to determine the ore-controlling structure;

[0015] The geological background investigation includes: tectonic background, determination of ore-bearing anticline structural strata, structural characteristics and salt deposition characteristics, investigation of distribution characteristics of brine-type lithium deposits, and evaluation of brine-type lithium deposit resource potential in anticline structural areas;

[0016] The determination of the ore-controlling structure includes: determining the structure in the brine-type lithium ore stratum that is related to mineralization and controls the generation of brine-type lithium ore.

[0017] Preferably, the process of determining the ore-bearing anticline stratigraphic structure, structural features, and salt deposition characteristics includes:

[0018] Through the spatial relationship between the strata rich in brine-type lithium deposits, the ore-bearing anticline structural strata and the brine-type lithium deposits, the ore-bearing anticline structural strata, structural characteristics and salt deposition characteristics are determined.

[0019] Preferably, the process of investigating the distribution characteristics of brine-type lithium deposits includes:

[0020] Determine the hydrochemical type of brine, its distribution characteristics and the types of co-existing elements;

[0021] The process of determining the hydrochemical type of brine, the distribution characteristics of brine and the types of co-existing elements includes:

[0022] The producing horizon, occurrence characteristics, grade and thickness are determined by the spatial relationship between the strata and structures where the deep brine in the anticline structure is stored.

[0023] Preferably, the process of evaluating the brine-type lithium ore resource potential in the anticline structure area includes:

[0024] Based on the output horizon, occurrence characteristics, grade and thickness of the brine-type lithium ore layer in the anticline structure, the brine-type lithium ore resource potential in the anticline structure area is obtained.

[0025] Preferably, the sample collection includes: collection of samples for hydrochemical analysis, pore depth analysis, isotope analysis and age determination.

[0026] Preferably, the process of determining the elements of the metallogenic model using analytical test data and field survey data includes:

[0027] Based on the field investigation and research data and various analytical test data, the mineralization geological background of known anticline structural fracture-pore type brine lithium deposits is summarized;

[0028] By studying the characteristics of brine and mineralization in the mining area, the ore-controlling structure and ore-bearing anticline structural strata of lithium mineralization in the anticline structural fracture-pore type brine were determined.

[0029] Using the main and trace analysis data of the system samples, the mineralization characteristics and associated element analysis are analyzed based on the study of the distribution law of the deep brine lithium deposits in the anticline structure;

[0030] Based on the anticline structural strata, the prospecting signs are determined; the isotope analysis and age determination of brine samples are used to determine the mineralization era, tectonic environment, mineralization structure, brine occurrence characteristics, material sources, physical and chemical conditions, and lake basin evolution.

[0031] Preferably, the process of conducting a comprehensive study to realize the construction of a mineralization model for the known anticline structure fracture-pore type brine lithium deposit comprises:

[0032] Based on the research results and data analysis, the mineralization process of known anticline structure fracture-pore type brine lithium deposits was simulated and analyzed, the key mineralization geological elements of anticline structure fracture-pore type brine lithium deposits were extracted, the genesis of the brine deposits was analyzed, and based on the obtained geological analysis data and the anticline structure mineralization theory, a mineralization model map of known anticline structure fracture-pore type brine lithium deposits was compiled.

[0033] Compared with the prior art, the present invention has the following advantages and technical effects:

[0034] The method provided by the present invention is to construct a mineralization model for anticline structure fissure pore type brine lithium deposits. By borrowing the research data of predecessors and conducting further field geological surveys and indoor analysis and testing, the mineralization process of anticline structure fissure pore type brine lithium deposits is comprehensively studied, and a mineralization model of anticline structure fissure pore type brine lithium deposits is established. This provides a theoretical basis for the planning and deployment of anticline structure fissure pore type brine lithium deposits in the later period of my country, and provides technical support for the exploration and development of this type of anticline structure fissure pore type brine lithium ore resources.

[0035] The present invention provides a method for constructing a mineralization model for anticline structure fissure-pore type brine lithium deposits, which includes data collection and secondary development, field geological surveys, analysis and testing, indoor comprehensive research, and mineralization model construction. The technical process is clear and the operability is strong. The constructed anticline structure fissure-pore type brine lithium mineralization model can well guide the prospecting and prediction work of anticline structure fissure-pore type brine lithium resources.

[0036] The method provided by the present invention is based on the research results of the mineralization process of the fracture-pore brine deposit in the Nanyi Mountain structure of Qinghai Province. It has the advantages of clear and convenient technical process, strong operability, good applicability, accuracy and intuitiveness, and can be applied to the research on the mineralization models of brine-type lithium deposits and associated potassium and boron deposits.

[0037] The method provided by the present invention for constructing a mineralization model for anticline structure fissure-pore type brine lithium deposits can effectively determine the key geological information of the mineralization of anticline structure fissure-pore type brine lithium deposits, simulate the geological process of anticline structure fissure-pore type brine lithium mineralization, and construct a mineralization model for a known typical anticline structure fissure-pore type brine lithium deposit for the first time. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0039] Figure 1 This is a diagram of the mineralization model of the Nanyishan structural fissure-pore brine potassium-lithium deposit in Qinghai Province according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0042] like Figure 1 As shown, this embodiment provides a method for constructing a mineralization model for anticline structure fracture-pore type brine lithium deposit, comprising the following steps:

[0043] Step 1: Collection and collation of existing exploration and research data on known anticline structural fracture-pore brine lithium deposits;

[0044] Step 2: Analyze and determine the basic mineralization elements of the known anticline structural fracture-pore brine lithium deposit;

[0045] Step 3: Conduct field geological surveys and sample collection on known anticline structure fracture-pore type brine lithium deposits;

[0046] Step 4: Determine the elements of each metallogenic model using analytical test data and field survey data;

[0047] Step 5: Conduct comprehensive research to construct a mineralization model for known anticline structural fissure-pore brine lithium deposits.

[0048] Furthermore, the data of the ore deposit collected in step 1 include: mineralization geological background, geological characteristics of the ore deposit, hydrogeological characteristics of the mining area, sedimentary structure, sedimentary environment, mineralization conditions, ore-controlling factors, and lake basin evolution.

[0049] Furthermore, the basic elements of the mineralization of the anticline structure fissure pore type brine lithium deposit known in step 2 include: geological characteristics of the deposit, mineralization age, tectonic environment, mineralization structure, brine occurrence characteristics, material source, physicochemical conditions, lake basin evolution and geological action.

[0050] Furthermore, the field geological survey of the known anticline structure fissure-pore brine lithium deposit in step 3 includes: conducting a regional mineralization geological background survey, roughly determining the ore-controlling structure, roughly determining the ore-bearing anticline structure strata, structural characteristics and salt deposition characteristics, studying the distribution characteristics of brine-type lithium deposits, and evaluating the brine-type lithium deposit resource potential in the anticline structure area.

[0051] Furthermore, the geological background investigation includes: investigation of the tectonic background, ore-bearing anticline structural strata, structural characteristics and salt deposition characteristics, and distribution characteristics of brine-type lithium deposits.

[0052] Furthermore, the determination of the ore-controlling structure specifically includes: determining the structure in the brine-type lithium ore stratum that is related to mineralization and controls the generation of brine-type lithium ore.

[0053] Furthermore, the ore-bearing anticline structural strata, structural characteristics and salt deposition characteristics are determined specifically as follows: the ore-bearing anticline structural strata, structural characteristics and salt deposition characteristics are determined through the spatial relationship between the strata rich in brine-type lithium ores and the brine-type lithium ores.

[0054] Furthermore, the occurrence and distribution characteristics of the anticline structure fracture-pore type brine lithium ore are specifically determined by: determining the hydrochemical type of the brine, the distribution characteristics of the brine, and the types of co-existing elements. Specifically, the spatial relationship between the strata and structures in which the deep brine in the anticline structure is stored is determined, and the output horizon, occurrence characteristics, grade, and thickness are determined.

[0055] Furthermore, the evaluation of the brine-type lithium ore resource potential in the anticline structure area is specifically: determining the output layer, occurrence characteristics, grade and thickness of the brine-type lithium ore layer in the anticline structure, and finally determining the brine-type lithium ore resource potential in the anticline structure area.

[0056] Furthermore, the sample collection in step 3 includes: collecting samples for hydrochemical analysis, pore depth analysis, isotope analysis and age determination.

[0057] Furthermore, the step 4 is specifically as follows: summarizing the mineralization geological background of the known anticline structure fracture-pore type brine lithium deposit based on field investigation and research data and various analytical test data;

[0058] Through detailed research on the brine characteristics and mineralization in the mining area, the ore-controlling structure and ore-bearing anticline structural strata of lithium mineralization in the anticline structural fissure-pore type brine were roughly determined; specifically, through detailed research on the anticline structural strata, structural characteristics and salt deposition characteristics, the output layer, occurrence characteristics, grade and thickness were determined.

[0059] Using the primary and trace analysis data of systematic samples, the brine mineralization characteristics and co-existing element analysis are analyzed on the basis of the study of brine distribution characteristics; based on the anticline structural strata, the prospecting signs are determined; using the isotope analysis and age determination research of brine samples, the mineralization age, tectonic environment, mineralization structure, brine occurrence characteristics, material source, physical and chemical conditions, and lake basin evolution are determined, and the mineralization process of anticline structural fracture-pore type brine lithium deposits is studied.

[0060] Furthermore, the step 5 is specifically as follows: through the above research results and data analysis, simulate and analyze the mineralization process of the known anticline structure fissure pore type brine lithium deposit, extract the key anticline structure fissure pore type brine lithium deposit mineralization geological elements, analyze the genesis of the brine deposit, and according to the obtained geological analysis data, apply the anticline structure mineralization theory to compile the mineralization model map of the known anticline structure fissure pore type brine lithium deposit.

[0061] Taking the Nanyishan structural fissure-pore brine potassium-lithium deposit in Qinghai Province (Nanyishan brine deposit) as an example, the present invention provides a method for constructing a mineralization model for anticline structural fissure-pore brine lithium deposit, which specifically includes the following steps:

[0062] Step 1: Collect and organize the existing exploration and research data of the Nanyishan structural fissure-pore brine potassium-lithium deposit (Nanyishan brine deposit) in Qinghai Province.

[0063] Systematically collect exploration and research data on the Nanyishan tectonic fissure-porous brine potassium-lithium deposit (Nanyishan brine deposit) in Qinghai Province. Analyze, summarize, and redevelop previous data to fully grasp the basic data of the Nanyishan tectonic fissure-porous brine potassium-lithium deposit (Nanyishan brine deposit) in Qinghai Province. Verify the reliability of data from different sources and identify supplementary work and missing data in previous work. Collect previous research data and reports related to the deposit's metallogenic geological background, geological characteristics of the deposit, hydrogeological characteristics of the mining area, sedimentary structure, sedimentary environment, mineralization conditions, ore-controlling factors, and lake basin evolution.

[0064] Step 2: Analyze and determine the basic elements of lithium mineralization in the Nanyishan tectonic fissure-pore brine potassium-lithium deposit (Nanyishan brine deposit) in Qinghai Province.

[0065] The basic elements for constructing the mineralization model are analyzed and determined, including the geological characteristics of the ore deposit, the mineralization era, the tectonic environment, the mineralization structure, the characteristics of the brine occurrence, the source of the material, the physical and chemical conditions, the lake basin evolution and the geological process.

[0066] Step 3: Conduct field geological survey and sample collection on the Nanyishan structural fissure-pore brine potassium-lithium deposit (Nanyishan brine deposit) in Qinghai Province.

[0067] A field geological survey was conducted on the Nanyishan structural fissure-pore brine potassium-lithium deposit (Nanyishan brine deposit) in Qinghai Province, and a regional mineralization geological background survey was carried out. The Nanyishan is generally divided into five layers. The base is mainly the Lower Ganchaigou Formation of the Oligocene Series, the middle part is the Upper Ganchaigou Formation of the Miocene Series, the Lower Youshashan Formation, the Upper Youshashan Formation of the Pliocene Series, and the uppermost is covered by the Shizigou Formation of the Pliocene Series. The ore-controlling structure was determined. The structure in the Nanyishan brine deposit is developed, mainly including fold structure, complex fold structure and fissure structure. The fold structure is mainly the Nanyishan regional fault. The place where the fissure structure is developed is the main place for the formation of continuous brine ore bodies with high mineralization. The stratigraphic determination of the ore-bearing anticline structure was determined by the drilling data of the Nanyishan brine deposit. The brine occurrence characteristics were studied. The brine characteristics of the Nanyishan brine deposit are mainly chloride type, and the brine has Na + Mg 2+ , K + 、Cl -. According to the basic elements of lithium mineralization of the Nanyishan tectonic fissure pore brine potassium-lithium deposit (Nanyishan brine deposit) in Qinghai Province determined by the analysis in step 2, including the geological characteristics of the Nanyishan brine deposit, the mineralization age, tectonic environment, mineralization structure, brine occurrence characteristics, material sources, physical and chemical conditions, lake basin evolution and geological effects, etc., combined with the results of field investigations, brine samples were systematically collected, including hydrochemical analysis samples, pore depth samples, isotope analysis and age determination samples. The field investigation and sample collection work refer to the "Mineral Geological Exploration Specifications for Salts" (DZ / T0212.1-2020 standard).

[0068] Step 4: Use analytical test data and field survey information to determine the elements of each metallogenic model.

[0069] The samples collected in step 3 are analyzed and tested separately, and the analysis and test data are obtained through a professional geological laboratory, including major and trace element analysis data, borehole depth measurement of borehole depth samples, isotope analysis and age determination.

[0070] Based on field survey results and various analytical test data, the mineralization geological background of the Nanyishan tectonic fissure-pore brine potassium-lithium deposit (Nanyishan brine deposit) in Qinghai Province is concluded to be that since the Paleogene, under arid paleoclimatic conditions, surface evaporation caused a large amount of original surface water to continuously concentrate and crystallize into salt. Some of the uncrystallized groundwater formed highly mineralized brine, which was stored in the pores of the rock salt. The underground brine used pre-formed fault fissures as migration channels and was preserved in fault fissures and stratigraphic pores. This determined that the ore-controlling structure of the brine mineralization was a fissure structure, and the strata of the ore-bearing anticline structure were carbonate rocks.

[0071] Based on the brine mineralization research, the brine mineralization characteristics and associated elements were analyzed. According to the results of multivariate statistics and the analytical test data of the main elements of the samples, Li + , K + The correlation coefficient with trace elements is calculated as follows:

[0072]

[0073] Where cov(x, y) is the covariance of x and y, var[x] is the variance of x, and var[y] is the variance of y.

[0074] According to geological work experience, the correlation coefficient is less than 0.37 and is not considered. + , K + The correlation coefficients with various trace elements are shown in Table 1.

[0075] Table 1

[0076] r <![CDATA[K + ]]> <![CDATA[Na + ]]> <![CDATA[Ca 2+ ]]> <![CDATA[Mg 2+ ]]> <![CDATA[Cl - ]]> <![CDATA[SO4 2- ]]> <![CDATA[Li + ]]> <![CDATA[K + ]]> 1.00 <![CDATA[Li + ]]> 0.66 0.38 0.37 0.00 0.42 -0.17 1.00

[0077] The results in Table 1 show that the Nanyishan brine deposit is characterized by anticline structural fracture brine. + With SO4 2- and Mg 2+ The correlation coefficients are 0.00 and -0.17, showing a certain degree of negative correlation, indicating that the magnesium sulfate content of brine is low under the runoff conditions in a closed reducing environment. + With K + 、Na + , Ca 2+ 、Cl - The correlation coefficients are 0.66, 0.38, 0.37 and 0.42 respectively, showing a certain degree of positive correlation; this indicates that the hydrochemical action of brine is the migration and accumulation of salt in a long-term closed environment, and the hydrochemical type belongs to chloride type. + The high content indicates the addition of deep-source materials and good sealing properties. Through the research and analysis of the Nanyishan brine mineralization, it was determined that the anticline structural fissure-pore brine is the prospecting hallmark of the Nanyishan brine deposit. At the same time, the isotope analysis and age determination were used to determine the source of mineralization, the mineralization age, the lake basin evolution and the mineralization structure, and to study the mineralization process of the anticline structural fissure-pore brine deposit.

[0078] The isotope analysis and age determination study involved first collecting brine samples from the fissures and pores of anticline structures. Each brine sample was collected in a 500ml high-density polyethylene (HDPE) narrow-mouth bottle. The bottle was soaked in 10% nitric acid solution for 24 hours, then drained, rinsed with ultrapure water (18.25 MΩ×cm2, 5°C), and dried at 30°C. The bottle was rinsed three times with the sampled water. Samples for trace element analysis were then added with pure nitric acid to a pH of <1 and sealed for subsequent laboratory analysis. The brine samples were photographed, numbered, and labeled. Each brine sample was analyzed using an isotope mass spectrometer. Data from all brine samples were collected in the Rock and Mineral Identification Laboratory of the Institute of Geology and Mineral Resources, Beijing Research Institute of Geology, using a Picarro L2140-i water vapor isotope analyzer from Picarro, USA. The samples were sealed and collected.

[0079] The results show that the isotope analysis and age determination of brine samples show that the δ 18O values ​​vary from -3.27‰ to +8.03‰, with an average of +4.90‰; δD values ​​range from -49.6‰ to -36.9‰, with an average of -41.9‰. This suggests that the Nanyishan brine deposit may have been formed by syngenetic sedimentary brine, possibly formed by magmatic water intruding into formation water since the Tertiary Period, or by paleolaustic water or intercrystalline brine buried with sediments. The Nanyishan anticline was later formed by the control and compression of deep faults in the surrounding mountain range. Formed in the late Pliocene, the Nanyishan anticline developed longitudinal, transverse, oblique, and bedding-parallel faults, as well as corresponding structural fractures, providing storage space for deep brine. Mineralization in the Nanyishan brine deposit progressed through deep lacustrine, semi-deep lacustrine, shallow lacustrine, and tidal flat facies from the Oligocene to the Pliocene. Therefore, the deep brine layer of the Nanyishan anticline structure is distributed in the shallow anticline structure, where fractures are relatively developed in the lower Ganchaigou Formation (E3g), upper Ganchaigou Formation (N2g), and lower Youshashan Formation (N2y).

[0080] Step 5: Conduct comprehensive research to construct the mineralization model of the Nanyishan tectonic fissure-pore brine deposit (Nanyishan brine deposit) in Qinghai Province.

[0081] Through the above research results and data analysis, the mineralization process of the Nanyishan structural fissure pore brine deposit (Nanyishan brine deposit) in Qinghai Province was simulated and analyzed, the key anticline structural fissure pore type brine lithium mineralization geological elements were extracted, the deposit genesis was analyzed, and a four-stage mineralization model diagram of the Nanyishan structural fissure pore brine potassium-lithium deposit (Nanyishan brine deposit) in Qinghai Province was compiled, as shown in the figure. Figure 1 shown.

[0082] This mineralization model map, based on the research conducted in Steps 1-4, identified the various metallogenic elements of anticline-tectonic fissure-pore brine lithium mineralization and was compiled using the theory of anticline mineralization. The evolution of the Nanyishan brine deposit is generally characterized by the following: Beginning 65 million years ago, the Himalayan movement caused rapid uplift of the southern Qilian and eastern Kunlun Mountains surrounding the basin, as well as the western Altun Mountains. The depocenter shifted from the Lenghu-Nanbaxian Delingha region on the northern edge of the Qaidam Basin to the Xiaoliangshan-Nanyishan-Dafengshan region in the southwest of the Qaidam Basin. Rapid erosion of K- and Na-rich intermediate-acidic rocks during the Hualixi and Indosinian periods carried mineralizing materials into the Qaidam Basin via water bodies during the Paleocene-Oligocene epochs. Hot springs rising along basement faults introduced elements such as boron and lithium into the lake basin, thus establishing the first stage of paleo-lake basin formation and the migration and replenishment of mineralizing elements.

[0083] During the Oligocene, the surrounding mountain ranges blocked warm, moist air from entering the basin. Consequently, the Qaidam Basin has generally experienced a colder climate than in the early Cenozoic, characterized by low recharge and high evaporation. This led to increased evaporation and concentration of paleolake water, resulting in a rapid increase in salinity. This resulted in the deposition of gypsum, halite, and other solid salt minerals within the strata. In the western basin, sedimentary centers such as Shizigou, Nanyishan, Xiaoliangshan, and Dafengshan gradually concentrated water to form highly mineralized brines, marking the second phase of evaporation and concentration, and the enrichment of ore-forming elements.

[0084] Under the influence of cyclical climate change, changes in recharge, and shifts in the sedimentary environment, a sedimentary sequence with alternating coarse-medium-fine distribution was formed during the sedimentation of the paleo-lake basin. The coarse-grained facies is a favorable reservoir for brine deposits. As sedimentation continued and the sedimentary environment changed, the brine deposits initially contained within the coarse-grained strata were sealed by fine-grained caprocks, forming sedimentary metamorphic brines. This marked the third stage of reservoir formation and brine storage.

[0085] Since the Pliocene, the central and western parts of the basin have been subject to north-south compression, resulting in overall fold uplift, forming the predominantly northwest-west-trending fold belts, including the Kunbei-Xiongxiongling open fold belt, the Yingbei parallel linear fold belt, and the central en echelon fold belt. During the formation of these fold structures, compressional stresses dominated in synclines and tensile stresses in anticlines. Potassium-, boron-, and lithium-rich brines trapped in the strata were squeezed and migrated toward the anticlines, forming deep-seated fissure-pore brine deposits. This marked the fourth stage of tectonic uplift and migration mineralization.

[0086] This metallogenic model diagram comprehensively reflects the metallogenic process of the Nanyishan tectonic fissure-pore brine deposit (Nanyishan brine deposit) in Qinghai Province, and has guiding significance for prospecting and prediction of resources of this type of brine deposit.

[0087] The present invention is applicable to the basic research of anticline structural fissure-pore type brine lithium resources in my country, and can provide the most direct and accurate information for the development and utilization of anticline structural fissure-pore type brine lithium resources in my country.

[0088] The above are merely preferred embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A method for constructing a mineralization model for anticline structural fissure-pore type brine lithium deposits, characterized in that: include: Collect and organize the existing exploration and research data of known anticline structural fracture-pore type brine lithium deposits; Analyze and determine the basic elements of mineralization of the known anticline structural fracture-pore type brine lithium deposit; Conducting field geological surveys and collecting samples of the known anticline structural fissure-pore type brine lithium deposits; Determine the elements of the metallogenic model using analytical test data and field survey information; Comprehensive research is carried out to construct the mineralization model of the known anticline structure fissure-pore brine lithium deposit.

2. The method according to claim 1, characterized in that The process of collecting and collating existing exploration and research data of known anticline structural fracture-pore type brine lithium deposits includes: Collect the mineralization geological background, geological characteristics of the mineralization deposit, hydrogeological characteristics of the mining area, sedimentary structure, sedimentary environment, mineralization conditions, ore-controlling factors, and lake basin evolution of the mineralization deposit.

3. The method according to claim 1, characterized in that The basic elements include: geological characteristics of the ore deposit, mineralization era, tectonic environment, mineralization structure, brine storage characteristics, material sources, physical and chemical conditions, lake basin evolution and geological action.

4. The method according to claim 1, characterized in that The process of conducting field geological survey and sample collection for the known anticline structural fracture-pore type brine lithium deposit includes: conducting regional mineralization geological background survey and determining the ore-controlling structure; The geological background investigation includes: tectonic background, determination of ore-bearing anticline structural strata, structural characteristics and salt deposition characteristics, investigation of distribution characteristics of brine-type lithium deposits, and evaluation of the potential of brine-type lithium deposits in anticline structural areas; The identification of ore-controlling structures includes: determining structures in brine-type lithium ore strata that are related to mineralization and control the generation of brine-type lithium ore.

5. The method according to claim 4, characterized in that The process of determining the stratigraphic structure, structural features and salt deposition characteristics of the ore-bearing anticline includes: Through the spatial relationship between the strata rich in brine-type lithium ores, the ore-bearing anticline structural strata and the brine-type lithium ores, the ore-bearing anticline structural strata, structural characteristics and salt deposition characteristics are determined.

6. The method according to claim 4, characterized in that The process of investigating the distribution characteristics of brine-type lithium deposits includes: Determine the hydrochemical type of brine, the distribution characteristics of brine and the types of co-existing elements; The process of determining the hydrochemical type of brine, the distribution characteristics of brine and the types of associated elements includes: The producing layer, occurrence characteristics, grade and thickness are determined by the spatial relationship between the strata and structures where the deep brine of the anticline structure is stored.

7. The method according to claim 4, characterized in that The process of evaluating the potential of brine-type lithium ore resources in anticline structural areas includes: Based on the output horizon, occurrence characteristics, grade and thickness of the brine-type lithium ore layer in the anticline structure, the resource potential of brine-type lithium ore in the anticline structure area is obtained.

8. The method according to claim 1, characterized in that The sample collection includes: the collection of water chemical analysis samples, pore depth samples, isotope analysis and age determination samples.

9. The method according to claim 1, characterized in that: The process of using analytical test data and field survey information to determine the elements of the mineralization model includes: Based on the field investigation and research data and various analytical test data, the mineralization geological background of known anticline structural fracture-pore type brine lithium deposits is summarized; Through the study of brine characteristics and mineralization in the mining area, the ore-controlling structure and ore-bearing anticline structural strata of lithium mineralization in the fracture-pore type brine of the anticline structure were determined; Using the main and trace analysis data of the system samples, the mineralization characteristics and associated element analysis are analyzed based on the study of the distribution law of the deep brine lithium deposits in the anticline structure; Based on the anticline structural strata, the prospecting signs are determined; through the isotope analysis and age determination of brine samples, the mineralization era, tectonic environment, mineralization structure, brine occurrence characteristics, material sources, physical and chemical conditions, and lake basin evolution are determined.

10. The method according to claim 1, characterized in that The process of conducting a comprehensive study to realize the construction of the mineralization model of the known anticline structural fracture-pore type brine lithium deposit includes: According to the research results and data analysis, the mineralization process of known anticline structure fissure-pore type brine lithium deposits is simulated and analyzed, the key mineralization geological elements of anticline structure fissure-pore type brine lithium deposits are extracted, the genesis of the brine deposits is analyzed, and based on the obtained geological analysis data and the anticline structure mineralization theory, a mineralization model map of known anticline structure fissure-pore type brine lithium deposits is compiled.

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