A method for evaluating the mineralization potential of granite based on rare earth element characteristics and its application

Abstract

The invention discloses a method and application for evaluating the mineralization potential of granite based on rare earth element characteristics, and relates to the technical field of mineral deposit exploration. The method for evaluating the mineralization potential of granite based on rare earth element characteristics can make full use of the whole rock geochemical characteristics of granite to evaluate the mineralization potential of granite. Starting from the mineralization parent rock of the ion adsorption type rare earth ore in South China, according to the enrichment multiples of rare earth oxides of the ore body and the mineralization granite, the application takes the lowest industrial grade as the evaluation standard, and establishes the whole rock rare earth element characteristic evaluation standard by analyzing the threshold value of the whole rock rare earth oxide content and the ratio of the light and heavy rare earth oxide content, so as to judge the mineralization potential of granite, and can screen out granite with mineralization potential, which is convenient for further exploration, and is conducive to narrowing the exploration scope, shortening the exploration cycle, and reducing material and labor costs; quickly and efficiently screening granite with potential; and greatly improving the accuracy of mineralization prediction.

Description

Technical Field

[0001] The present invention relates to the technical field of mineral deposit exploration, and in particular to a method for evaluating the mineralization potential of granite based on rare earth element characteristics and its application. Background Art

[0002] Ion adsorption rare earth deposits supply more than 80% of the world's heavy rare earth resources. With the increasingly severe international competition for strategic resources in recent years, this type of deposit, as a dominant mineral species in my country, has always been the focus of research in the business and academic circles. Traditional prospecting methods, such as using the chemical characteristics of water sediments or marker plants, require a lot of field work experience and a lot of data collection, which seriously restricts the exploration of ion adsorption rare earth deposits.

[0003] The current prospecting method is to collect samples of weathering crust on site, then measure the content of rare earth oxides in the collected samples, and judge whether it has been mineralized or not by industrial grade. However, there is currently no research on the evaluation method of the mineralization potential of granite.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a method for evaluating the mineralization potential of granite based on rare earth element characteristics and its application.

[0006] The present invention is achieved in that:

[0007] In a first aspect, the present invention provides a method for evaluating the mineralization potential of granite based on rare earth element characteristics, comprising:

[0008] (1) Collecting data on multiple existing ion adsorption rare earth deposits, wherein the ion adsorption rare earth deposits include multiple light rare earth deposits and multiple heavy rare earth deposits, and the data include enrichment multiples R x , the content of each light rare earth oxide and each heavy rare earth oxide in the ore-forming granite;

[0009] (2) Calculate the average enrichment multiple R of the light rare earth deposit L and the average enrichment multiple R of the heavy rare earth deposit H ;

[0010] (3) Calculate the total rare earth oxide content threshold C in light rare earth mineralization granite according to formula I and formula II sL The total rare earth oxide content threshold C in heavy rare earth ore-forming granites sH , wherein Formula I is: C sL ×R L =The lowest industrial grade of light rare earth deposits, Formula II is CsH ×R H =The lowest industrial grade of heavy rare earth deposits;

[0011] (4) Calculating the ratio Y of the total content of light rare earth oxides to the total content of heavy rare earth oxides in the ore-forming granites of the heavy rare earth deposits LREO / HRYO , with the highest Y LREO / HRYO(MAX) as critical value;

[0012] (5) Collect multiple samples of granite to be tested, and count the content of each light rare earth oxide and the content of each heavy rare earth oxide in each sample, and calculate the total rare earth oxide content ∑REO of each sample of the granite to be tested and the ratio X of the sum of the total content of light rare earth oxides to the sum of the total content of heavy rare earth oxides. LREO / HRYO The total rare earth oxide content of multiple samples is added and averaged to obtain the average rare earth oxide content. For multiple samples of X LREO / HRYO Add and average to obtain by and As an evaluation index of the granite to be tested;

[0013] (6) Comparison C sL and C sH , while comparing and Y LREO / HRYO(MAX) ;

[0014] when Greater than C sL and Greater than Y LREO / HRYO(MAX) When the granite to be tested is evaluated as having light rare earth mineralization potential;

[0015] when Greater than C sH and Less than Y LREO / HRYO(MAX) When the granite to be tested is evaluated as having heavy rare earth mineralization potential.

[0016] In an optional embodiment, the light rare earth oxide includes La2O3, CeO2, Pr6O 11 , Nd2O3, Sm2O3 and Eu2O.

[0017] In an optional embodiment, the heavy rare earth oxide includes Gd2O3, Tb4O7, Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3, Lu2O3 and Y2O3.

[0018] In an optional embodiment, the total content of light rare earth oxides is obtained by adding the contents of all light rare earth oxides, and the total content of heavy rare earth oxides is obtained by adding the contents of all heavy rare earth oxides.

[0019] In an optional embodiment, the lowest industrial grade of the light rare earth is 0.05wt%-0.098wt%, and the lowest industrial grade of the heavy rare earth is 0.035wt%-0.065wt%.

[0020] In an optional embodiment, the lowest industrial grade of the light rare earth is 0.05wt%, and the lowest industrial grade of the heavy rare earth is 0.035wt%.

[0021] In an optional embodiment, collecting data of a plurality of existing ion adsorption type rare earth deposits includes obtaining data from exploration reports of a plurality of known deposits or obtaining data by calculation through formula III, wherein formula III is: Among them, TREO k is the average grade of the deposit (wt%); P k is the proportion of ionic phase (%); It is the average rare earth oxide content of the mineralization parent rock.

[0022] In an optional embodiment, the method for collecting the light rare earth oxide content and the heavy rare earth oxide content of the granite to be tested includes obtaining the content by statistical analysis of the geochemical data of the granite to be tested or by detecting the granite to be tested using ICP-MS.

[0023] In a second aspect, the present invention provides the application of the above-mentioned method for evaluating the mineralization potential of granite based on rare earth element characteristics in mineral deposit exploration.

[0024] In a third aspect, the present invention provides an exploration method for ion-adsorption rare earth deposits, which includes the method for evaluating the mineralization potential of granite based on the characteristics of rare earth elements as described in any of the above-mentioned embodiments.

[0025] The present invention has the following beneficial effects:

[0026] The method for evaluating the mineralization potential of granite based on rare earth element characteristics provided in the present application can make full use of the whole-rock geochemical characteristics of granite to evaluate the mineralization potential of granite. The present application starts from the mineralization parent rock of the ion-adsorption type rare earth ore in South China, based on the average enrichment multiples of rare earth oxides between the ore body and the mineralization granite, and takes the lowest industrial grade as the evaluation standard. By analyzing the threshold value of the whole-rock rare earth oxide content and the ratio of the light and heavy rare earth oxide content, a whole-rock rare earth element characteristic evaluation standard is established to judge the mineralization potential of granite. This application can evaluate whether the granite in the selected area has mineralization potential through the above method, which can enhance the staff's understanding of granite, continue to pay attention to granite with mineralization potential, and regularly collect weathering crust samples of granite for testing, thereby avoiding the existing large amount of and tedious work of collecting and judging all granite. Therefore, this application can help screen and assist in the actual exploration of some target objects and scopes, collect geochemical data of existing granite in the target area, and evaluate according to the scheme of this application. If there is mineralization potential after evaluation, this part of granite can be analyzed in the next step. If there is no mineralization potential after evaluation, this part of granite can be excluded, narrowing the scope of the target granite during actual exploration. If there is no geochemical data for the granite in the target area, it cannot be evaluated, and the original method needs to be used to explore the ore body. This method has the characteristics of "strong practicality, convenient and fast application", and can well screen possible mineralization targets in a large area. The method provided in the present application can screen out granite with mineralization potential by evaluating the mineralization potential of granite in advance, so as to facilitate further exploration thereof, and is conducive to narrowing the exploration scope, shortening the exploration cycle, and reducing material and human costs; it can quickly and efficiently screen granite with potential; and it can greatly improve the accuracy of mineralization prediction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 Schematic diagram of mineralization potential projection and discrimination of the method for evaluating the mineralization potential of granite based on rare earth element characteristics provided in Example 1 of the present application. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be described clearly and completely below. If the specific conditions are not specified in the embodiments, they are carried out according to conventional conditions or conditions recommended by the manufacturer. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased commercially.

[0030] In a first aspect, the present invention provides a method for evaluating the mineralization potential of granite based on rare earth element characteristics, comprising:

[0031] (1) Collect data on multiple existing ion-adsorption rare earth deposits.

[0032] The ion adsorption type rare earth deposits in this application are the existing publicly reported deposits. The ion adsorption type rare earth deposits include multiple light rare earth deposits and multiple heavy rare earth deposits. The data include the enrichment multiple R x , the content of each light rare earth oxide and each heavy rare earth oxide in the ore-forming granite; the above data can be directly obtained by querying the exploration reports of various existing deposits. When some data are difficult to obtain, the average grade of the deposit (TREO k wt%) and ionic phase proportion (P k %) and the rare earth oxide content of the ore-forming parent rock The calculation formula is as follows: Among them, TREO k is the average grade of the deposit (wt%); P k is the proportion of ionic phase (%); is the average rare earth oxide content of the mineralization parent rock. k and P k is a constant obtained by direct query, It is calculated by directly querying the content of each light rare earth oxide and each heavy rare earth oxide in the mineralized granite.

[0033] In this application, light rare earth elements and heavy rare earth elements are divided according to rare earth elements. Among them, La, Ce, Pr, Nd, Sm, and Eu are light rare earth elements, and Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y are heavy rare earth elements. Correspondingly, light rare earth oxides include La2O3, CeO2, Pr6O 11 , Nd2O3, Sm2O3 and Eu2O3. Heavy rare earth oxides include Gd2O3, Tb4O7, Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3, Lu2O3 and Y2O3.

[0034] (2) Calculate the average enrichment multiple R of light rare earth deposits Land the average enrichment multiple R of heavy rare earth deposits H .

[0035] In step (1), when the enrichment multiples are counted, since the ion adsorption type rare earth deposits include multiple light rare earth deposits and multiple heavy rare earth deposits, the multiple light rare earth deposits and multiple heavy rare earth deposits are counted separately. The average enrichment multiple R of the light rare earth deposits in this step is L That is, the average value of the enrichment multiples of multiple light rare earth deposits can be obtained by adding up the enrichment multiples of multiple light rare earth deposits. The average value of the enrichment multiples of heavy rare earth deposits is R H That is, the value can be obtained by adding up the enrichment multiples of multiple heavy rare earth deposits and taking the average value.

[0036] (3) Calculate the total rare earth oxide content threshold C in light rare earth mineralization granite according to formula I and formula II sL The total rare earth oxide content threshold C in heavy rare earth ore-forming granites sH , wherein Formula I is: C sL ×R L =The lowest industrial grade of light rare earth deposits, Formula II is C sH ×R H =The lowest industrial grade of heavy rare earth deposits;

[0037] The minimum industrial grade is specified in the geological prospecting specifications for rare earth minerals. In this application, the minimum industrial grade of light rare earth deposits is 0.05wt%-0.098wt%, and the minimum industrial grade of heavy rare earth deposits is 0.035wt%-0.065wt%. Preferably, this application takes the minimum value specified in the geological prospecting specifications for rare earth minerals as the preferred value. Specifically, the minimum industrial grade of light rare earth is 0.05wt%, and the minimum industrial grade of heavy rare earth is 0.035wt%.

[0038] (4) Calculate the ratio Y of the total content of light rare earth oxides to the total content of heavy rare earth oxides in the ore-forming granites of multiple heavy rare earth deposits LREO / HRYO , with the highest Y LREO / HRYO(MAX) as a critical value.

[0039] The total content of light rare earth oxides is obtained by adding the contents of all light rare earth oxides obtained in step (1), and the total content of heavy rare earth oxides is obtained by adding the contents of all heavy rare earth oxides. LREO / HRYO(MAX) as a critical value.

[0040] Generally speaking, in an ore body, the ratio of the total content of light rare earth oxides to the total content of heavy rare earth oxides is greater than 1 or less than 1 as a critical value to distinguish whether the ore body is mainly composed of light rare earth oxides (greater than 1) or heavy rare earth oxides (less than 1). However, during the weathering process of the ore body, Ce in the light rare earth elements will run out of the light rare earths and will not be in the ore body. It will partially accumulate in the shallow part of the weathering crust. Therefore, the Ce content in the deep ore body will decrease. Therefore, when the light-heavy rare earth oxide ratio of the rock body is greater than 1 (about 1.3), the light-heavy rare earth oxide ratio of the ore body formed by its weathering will reach 1, that is, the ratio of light-heavy rare earth oxides in the rock body is less than the ratio of light-heavy rare earth oxides in the ore body. Therefore, in this application, the highest Y LREO / HRYO(MAX) As a critical value, at this time, when the ratio of the rock mass is lower than the highest Y in the ore body LREO / HRYO(MAX) When the ratio of the rock mass is higher than the highest Y in the ore body, the content of heavy rare earth oxides will be greater than that of light rare earth oxides after mineralization, so it may have the potential to form a heavy rare earth ore body. LREO / HRYO(MAX) It is determined that the content of light rare earth oxides in the rock mass will be greater than that of heavy rare earth oxides after mineralization, so it may have the potential to form a light rare earth ore body.

[0041] (5) Collect multiple samples of granite to be tested, and count the content of each light rare earth oxide and each heavy rare earth oxide in each sample, and calculate the total rare earth oxide content ∑REO of each sample of granite to be tested, and the average rare earth oxide content of the granite to be tested And the ratio of the total content of light rare earth oxides to the total content of heavy rare earth oxides is X LREO / HRYO ; Collect multiple samples of granite to be tested, and count the content of each light rare earth oxide and the content of each heavy rare earth oxide in each sample, and calculate the total rare earth oxide content ∑REO of each sample of the granite to be tested and the ratio of the sum of the total content of light rare earth oxides to the sum of the total content of heavy rare earth oxides X LREO / HRYO The total rare earth oxide content of multiple samples is added and averaged to obtain the average rare earth oxide content. For multiple samples X LREO / HRYO Add and average to obtain by and As an evaluation index of the granite to be tested;

[0042] The method for collecting the light rare earth oxide content and the heavy rare earth oxide content of the granite to be tested includes obtaining the content by statistical analysis of the geochemical data of the granite to be tested or obtaining the content by detecting the granite to be tested using ICP-MS.

[0043] (6) Comparison C sL and C sH , while comparing and Y LREO / HRYO(MAX) ,

[0044] when Greater than C sL and Greater than Y LREO / HRYO(MAX) When the granite to be tested is evaluated as having light rare earth mineralization potential;

[0045] when Greater than C sH and Less than Y LREO / HRYO(MAX) At that time, the granite to be tested was evaluated as having heavy rare earth mineralization potential.

[0046] It should be understood that the design principle of this application is that the ion adsorption type rare earth deposit is located in the weathering crust, which is formed by the weathering of the underlying rock mass. During the weathering process, granite is constantly lifted upward, and the weathering crust accumulates and eventually forms a deposit, so an enrichment multiple R is formed between the weathering crust and the rock mass. x Since the geological exploration specifications for rare earth minerals distinguish between light rare earth deposits and heavy rare earth deposits, this application also distinguishes between light rare earth deposits R L and heavy rare earth deposits H Generally speaking, light rare earth deposits R L Heavy rare earth deposits R H The C concentration is smaller than the C concentration, which indicates that the rare earth oxide content of the light rare earth rock mass is relatively high, and the industrial grade can be reached at a relatively small enrichment multiple, thus forming a light rare earth ore body. The heavy rare earth ore deposit itself is relatively rare, and the rare earth element content is also low, so it requires a higher enrichment multiple to form an ore. Therefore, this application sets C sL and C sH , set C sL and C sH The purpose is that the higher the rare earth oxide content, the lower the enrichment multiple under the same climatic conditions can be used for mineralization. Therefore, this application sets a minimum critical value as an evaluation standard.

[0047] In addition, the present application also provides the application of the above-mentioned method for evaluating the mineralization potential of granite based on the characteristics of rare earth elements in mineral deposit exploration. Specifically, for example, the present invention provides an exploration method for ion adsorption type rare earth deposits, which includes the above-mentioned method for evaluating the mineralization potential of granite based on the characteristics of rare earth elements. By pre-evaluating the mineralization potential of granite, granite with mineralization potential can be screened out, which is convenient for further exploration, which is conducive to narrowing the exploration scope, shortening the exploration cycle, and reducing material and labor costs; quickly and efficiently screening granite with potential; and greatly improving the accuracy of mineralization prediction.

[0048] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0049] Example 1

[0050] This embodiment provides a method for evaluating the mineralization potential of granite based on the characteristics of rare earth elements, which uses the ion adsorption rare earth deposits in Guangdong and Guangxi as existing ion adsorption rare earth deposits to analyze the mineralization potential of the granite to be tested. Specifically, it includes the following steps:

[0051] (1) Data on a number of existing ion adsorption-type rare earth deposits are collected and summarized in Table 1. By querying, the content of each rare earth oxide in the mineralized granite, the type of deposit formed and the enrichment multiple can be found. The following total content ratio of light and heavy rare earth oxides can be calculated based on the content of each rare earth oxide.

[0052] Table 1. Statistics of existing ion adsorption rare earth deposits

[0053]

[0054] The above data on existing ion adsorption-type rare earth deposits are obtained by consulting articles to retrieve the content of each rare earth oxide in the mineralizing granite and the type of deposits it forms. The above data can be obtained through conventional calculations.

[0055] For example, take the calculation results of the Mantoushan heavy rare earth deposit as an example:

[0056] The original data obtained from the query of the Mantoushan heavy rare earth deposit are as follows:

[0057] Table 2. Statistical table of raw data obtained from the query of Mantoushan heavy rare earth deposit

[0058]

[0059]

[0060] The sum of the total content of light rare earth oxides, the sum of the total content of heavy rare earth oxides, and the ratio of the two X LREO / HRYOAnd the total content of rare earth oxides ∑REO is calculated, and the results are as follows:

[0061] Table 3. Data calculation results of the Mantoushan heavy rare earth deposit

[0062]

[0063]

[0064] Average rare earth oxide content of Mantoushan rock mass

[0065] The calculation formula for the enrichment multiple of the Mantoushan rock mass is: Among them, TREO is a constant of 0.096wt%, P is a constant of 84.28%, and the calculated result is

[0066] Y LREO / HRYO =(0.63+1.19+1.49+2.6+1.37+0.91+0.84+0.35+0.63+2.22+3.29+0.66+2.47+0.35+0.76+2.39+0.38) / 17=1.33.

[0067] The remaining mineral deposits are also calculated based on the above method and will not be elaborated one by one here.

[0068] (2) Calculate the average enrichment multiples of light rare earth deposits and heavy rare earth deposits, where R L =(2.38+1.59+2.24+3.74+1.72+2.47+3.13+2.6+4.5) / 9=2.71; R H =(4.17+4.55) / 2=4.36.

[0069] (3) Calculate the total rare earth oxide content threshold C in light rare earth mineralization granite according to formula I and formula II sL The total rare earth oxide content threshold C in heavy rare earth ore-forming granites sH , wherein Formula I is: C sL ×R L =The lowest industrial grade of light rare earth deposits, Formula II is C sH ×R H =The lowest industrial grade of heavy rare earth deposits;

[0070] In this embodiment, the lowest industrial grade of light rare earth is 0.05wt%, and the lowest industrial grade of heavy rare earth is 0.035wt%. sL=0.05 / 2.71=0.0185%, C sH =0.035 / 4.36=0.0080%.

[0071] (4) Calculate the ratio Y of the total content of light rare earth oxides to the total content of heavy rare earth oxides in the ore-forming granites of multiple heavy rare earth deposits LREO / HRYO , with the highest Y LREO / HRYO(MAX) as critical value;

[0072] As shown in Table 1, the Y LREO / HRYO is 1.33, and the Y LREO / HRYO is 0.57, therefore, in this embodiment, 1.33 is used as Y LREO / HRYO(MAX) .

[0073] (5) The content of each light rare earth oxide and each heavy rare earth oxide of the granite to be tested (Lianyang rock mass in western Guangdong, South China) were collected. The collected results are shown in Table 4:

[0074] Table 4. Statistical table of light rare earth oxide content of granite to be tested

[0075]

[0076] Table 5. Statistical table of heavy rare earth oxide content of granite to be tested

[0077]

[0078]

[0079] By converting the contents of light rare earth elements and heavy rare earth elements in Tables 4 and 5 above into their oxides, the sum of the total contents of light rare earth oxides and the total contents of heavy rare earth oxides of the granite to be tested, and the ratio of the two, X, are calculated. LREO / HRYO and the total rare earth oxide content ∑REO of the granite to be tested, the calculation results are shown in Table 6;

[0080] Table 6. ∑REO and X of the granite under test LREO / HRYO Calculation results statistics table

[0081]

[0082]

[0083] Where LREO is the sum of all light rare earth oxide contents in each sample:

[0084] LREO=(La / (138.9054*2 / (138.9054*2+15.9994*3))+Ce / (140.116 / (140.116+15.9994*2))+Pr / (140.9076*6 / (140.9076*6+15.9994* 11))+Nd / (144.242*2 / (144.242*2+15.9994*3))+Sm / (150.36*2 / (150.36*2+15.9994*3))+Eu / (151.964*2 / (151.964*2+15.9994*3)).

[0085] HRYO is the sum of all heavy rare earth oxide contents in each sample:

[0086] HRYO=Gd / (157.25*2 / (157.25*2+15.9994*3))+Tb / (158.9253*4 / (158.9253*4+15.9994*7))+Dy / (16 2.5*2 / (162.5*2+15.9994*3))+Ho / (164.9303*2 / (164.9303*2+15.9994*3))+Er / (167.259*2 / (167. 259*2+15.9994*3))+Tm / (168.9342*2 / (168.9342*2+15.9994*3))+Yb / (173.054*2 / (173.054*2+15. 9994*3))+Lu / (174.9668*2 / (174.9668*2+15.9994*3))+Y / (88.90585*2 / (88.90585*2+15.9994*3)).

[0087] X LREO / HRYO is the ratio of the sum of the light rare earth oxide content to the sum of the heavy rare earth oxide content of each sample, X LREO / HRYO =LREO / HRYO.

[0088] ΣREO(wt%)=(LREO+HRYO) / 100×100%.

[0089] Since 17 samples of granite were collected in this application, the X values ​​of these 17 samples were calculated. LREO / HRYO Average and ∑REO average As the rare earth

[0090] Evaluation index of total content of soil oxides.

[0091] Among them, X LREO / HRYO average value is 3.044117647;

[0092] (6) Comparison C sL and C sH , while comparing and Y LREO / HRYO(MAX) ,

[0093] The comparison basis is: Greater than C sL and Greater than Y LREO / HRYO(MAX) When , the granite to be tested is evaluated as having light rare earth mineralization potential; when Greater than C sH and Less than Y LREO / HRYO(MAX) When the granite to be tested is evaluated as having heavy rare earth mineralization potential. sL =0.0185%, C sH =0.0080%, Y LREO / HRYO(MAX) =1.33.

[0094] The comparison results are: Greater than C sL and Both are greater than Y LREO / HRYO(MAX) The granite to be tested is evaluated to have light rare earth mineralization potential. Please refer to the projection results for Figure 1 Furthermore, the granite selected for testing in this application has been verified to be a light rare earth deposit, the Gucheng deposit, which fully proves that the evaluation method of this application is consistent with the actual mineralization situation and can be used as a method for evaluating the mineralization potential of granite.

[0095] In summary, the method for evaluating the mineralization potential of granite based on rare earth element characteristics provided in the present application can make full use of the whole-rock geochemical characteristics of granite to evaluate the mineralization potential of granite. The present application starts from the mineralization parent rock of the ion-adsorption type rare earth ore in South China, based on the average enrichment multiples of rare earth oxides between the ore body and the mineralization granite, and takes the lowest industrial grade as the evaluation standard. By analyzing the threshold value of the whole-rock rare earth oxide content and the ratio of the light and heavy rare earth oxide content, a whole-rock rare earth element characteristic evaluation standard is established to judge the mineralization potential of granite. This application can evaluate whether the granite in the selected area has mineralization potential through the above method, which can enhance the staff's understanding of granite, continue to pay attention to granite with mineralization potential, and regularly collect weathering crust samples of granite for testing, thereby avoiding the existing large amount of and tedious work of collecting and judging all granite. Therefore, this application can help screen and assist in the actual exploration of some target objects and scopes, collect geochemical data of existing granite in the target area, and evaluate according to the scheme of this application. If there is mineralization potential after evaluation, this part of granite can be analyzed in the next step. If there is no mineralization potential after evaluation, this part of granite can be excluded, narrowing the scope of the target granite during actual exploration. If there is no geochemical data for the granite in the target area, it cannot be evaluated, and the original method needs to be used to explore the ore body. This method has the characteristics of "strong practicality, convenient and fast application", and can well screen possible mineralization targets in a large area. The method provided in the present application can screen out granite with mineralization potential by evaluating the mineralization potential of granite in advance, so as to facilitate further exploration thereof, and is conducive to narrowing the exploration scope, shortening the exploration cycle, and reducing material and human costs; it can quickly and efficiently screen granite with potential; and it can greatly improve the accuracy of mineralization prediction.

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for evaluating the mineralization potential of granite based on rare earth element characteristics, characterized in that: It includes: (1) Collecting data on multiple existing ion adsorption rare earth deposits, wherein the ion adsorption rare earth deposits include multiple light rare earth deposits and multiple heavy rare earth deposits, and the data include enrichment multiples R x , the content of each light rare earth oxide and each heavy rare earth oxide in the ore-forming granite; (2) Calculate the average enrichment multiple R of the light rare earth deposit L and the average enrichment multiple R of the heavy rare earth deposit H ; (3) Calculate the total rare earth oxide content threshold C of light rare earth mineralization granite according to formula I and formula II sL The total rare earth oxide content threshold C of heavy rare earth ore-forming granites sH , wherein Formula I is: C sL ×R L =The lowest industrial grade of light rare earth deposits, Formula II is C sH ×R H =The lowest industrial grade of heavy rare earth deposits; (4) Calculating the ratio Y of the total content of light rare earth oxides to the total content of heavy rare earth oxides in the ore-forming granites of the heavy rare earth deposits LREO / HRYO , with the highest Y LREO / HRYO(MAX) as critical value; (5) Collect multiple samples of granite to be tested, and count the content of each light rare earth oxide and the content of each heavy rare earth oxide in each sample, and calculate the total rare earth oxide content ∑REO of each sample of the granite to be tested and the ratio X of the sum of the total content of light rare earth oxides to the sum of the total content of heavy rare earth oxides. LREO / HRYO The total rare earth oxide content of multiple samples is added and averaged to obtain the average rare earth oxide content. For multiple X LREO / HRYO Add and average to obtain by and As an evaluation index of the granite to be tested; (6) Comparison C sL and C sH , while comparing and Y LREO / HRYO(MAX) ; when Greater than C sL and Greater than Y LREO / HRYO(MAX) When the granite to be tested is evaluated as having light rare earth mineralization potential; when Greater than C sH and Less than Y LREO / HRYO(MAX) When the granite to be tested is evaluated as having heavy rare earth mineralization potential.

2. The method for evaluating the mineralization potential of granite based on rare earth element characteristics according to claim 1, characterized in that: The light rare earth oxides include La2O3, CeO2, Pr6O 11 , Nd2O3, Sm2O3 and Eu2O3.

3. The method for evaluating the mineralization potential of granite based on rare earth element characteristics according to claim 1, characterized in that: The heavy rare earth oxides include Gd2O3, Tb4O7, Dy2O3, Ho2O3, Er2O3, Tm2O3, Yb2O3, Lu2O3 and Y2O3.

4. The method for evaluating the mineralization potential of granite based on rare earth element characteristics according to claim 1, characterized in that: The total content of light rare earth oxides is obtained by adding the contents of all light rare earth oxides, and the total content of heavy rare earth oxides is obtained by adding the contents of all heavy rare earth oxides.

5. The method for evaluating the mineralization potential of granite based on rare earth element characteristics according to claim 1, characterized in that: The lowest industrial grade of the light rare earth is 0.05wt%-0.098wt%, and the lowest industrial grade of the heavy rare earth is 0.035wt%-0.065wt%.

6. The method for evaluating the mineralization potential of granite based on rare earth element characteristics according to claim 5, characterized in that: The lowest industrial grade of the light rare earth is 0.05wt%, and the lowest industrial grade of the heavy rare earth is 0.035wt%.

7. The method for evaluating the mineralization potential of granite based on rare earth element characteristics according to claim 1, characterized in that: Collecting data of a plurality of existing ion adsorption type rare earth deposits includes obtaining data from exploration reports of a plurality of known deposits or calculating data through formula III, wherein formula III is: Among them, TREO k is the average grade of the deposit, in wt%; P k is the proportion of ionic phase, in %; It is the average rare earth oxide content of the mineralization parent rock.

8. The method for evaluating the mineralization potential of granite based on rare earth element characteristics according to claim 1, characterized in that: The method for collecting the light rare earth oxide content and heavy rare earth oxide content of the granite to be tested includes obtaining the content by statistical analysis of the geochemical data of the granite to be tested or by detecting the granite to be tested using ICP-MS.

9. Application of the method for evaluating the mineralization potential of granite based on rare earth element characteristics as described in any one of claims 1 to 8 in mineral deposit exploration.

10. A method for prospecting ion adsorption type rare earth deposits, characterized in that: It includes the method for evaluating the mineralization potential of granite based on rare earth element characteristics as described in any one of claims 1 to 8.

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