CN115825206A - Method for evaluating ore forming potential of granite based on rare earth element characteristics and application - Google Patents
Method for evaluating ore forming potential of granite based on rare earth element characteristics and application Download PDFInfo
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Abstract
The invention discloses a method for evaluating the ore forming potential of granite based on rare earth element characteristics and application thereof, and relates to the technical field of ore deposit exploration. The method for evaluating the ore forming potential of granite based on the rare earth element characteristics can fully utilize the all-rock geochemical characteristics of the granite to evaluate the ore forming potential of the granite, starts from the ore forming parent rock of south China ion adsorption type rare earth ore, establishes the all-rock rare earth element characteristic evaluation standard by analyzing the ratio of the threshold value of the all-rock rare earth oxide content and the light and heavy rare earth oxide content according to the enrichment times of the ore body and the rare earth oxide of the ore forming granite and taking the lowest industrial grade as the evaluation standard, is used for judging the ore forming potential of the granite, can screen the granite with the ore forming potential, is convenient for further exploration, is beneficial to reducing the exploration range, shortens the exploration period and reduces the material and labor costs; granite with potential is screened rapidly and efficiently; the accuracy of the ore formation prediction is greatly improved.
Description
Technical Field
The invention relates to the technical field of mineral deposit exploration, in particular to a method for evaluating the ore forming potential of granite based on rare earth element characteristics and application thereof.
Background
The ion adsorption type rare earth deposit supplies over 80 percent of heavy rare earth resources all over the world. With the increasing international competition situation of strategic resources in recent years, the ore deposit is used as the dominant ore species in China, and the method for searching the ore by the ore deposit is the key point of research in the business industry and the academic community. The traditional method for finding the mineral, such as the utilization of the chemical characteristics of the water system sediments or the marking plants and the like, needs a great deal of field working experience and a great deal of data collection, which seriously restricts the exploration of the ion adsorption type rare earth deposit.
The existing ore finding method is to collect a weathered crust sample on the spot, then measure the content of rare earth oxide in the collected sample, and judge whether the weathered crust sample is mineralized or not according to the industrial grade, but at present, no research is carried out on an evaluation method for the potential possibility of granite mineralization temporarily.
In view of this, the invention is particularly proposed.
Disclosure of Invention
The invention aims to provide a method for evaluating the mineralization potential of granite based on the characteristics of rare earth elements and application thereof.
The invention is realized in the following way:
in a first aspect, the present invention provides a method for evaluating the mineralization potential of granite based on rare earth element characteristics, comprising:
(1) Collecting data of a plurality of existing ion adsorption type rare earth deposits, wherein the ion adsorption type rare earth deposits comprise a plurality of light rare earth deposits and a plurality of heavy rare earth deposits, and the data comprise enrichment times R x The content of each light rare earth oxide and the content of each heavy rare earth oxide in the synthetic granite;
(2) Calculating the average value R of the enrichment times of the light rare earth deposit L And the mean value of the enrichment times R of the heavy rare earth deposit H ；
(3) Calculating the total content threshold C of rare earth oxides in the light rare earth ore-forming granite according to the formula I and the formula II sL Threshold C of total content of rare earth oxides in heavy rare earth and synthetic granite sH Wherein, formula I is: c sL ×R L = minimum industrial grade of light rare earth deposit, formula II is C sH ×R H = minimum industrial grade of heavy rare earth deposit;
(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 granite of a plurality of heavy rare earth deposits LREO/HRYO At the highest Y LREO/HRYO(MAX) As a critical value;
(5) Collecting a plurality of samples of granite to be detected, counting the content of each light rare earth oxide and the content of each heavy rare earth oxide in each sample, and calculating the total content Sigma REO of the rare earth oxide of each sample of the granite to be detected, the ratio X of the sum of the total content Sigma REO of the light rare earth oxide and the total content of the heavy rare earth oxide to the sum of the total content of the heavy rare earth oxide LREO/HRYO The total rare earth oxide content of the plurality of samples is then summed and averaged to obtain an average rare earth oxide content
X for multiple samples LREO/HRYO Performing addition and average to obtain
To be provided with
And
as the evaluation index of the granite to be detected;
(6) Comparison
C sL And C sH Simultaneously comparing
And Y LREO/HRYO(MAX) ；
When in use
Greater than C sL And is
Greater than Y LREO/HRYO(MAX) Then, the granite to be detected is evaluated to have the light rare earth mineralization potential;
when in use
Greater than C sH And is
Less than Y LREO/HRYO(MAX) And then, the granite to be detected is evaluated to have the heavy rare earth mineralization potential.
In an alternative embodiment, the light rare earth oxide comprises La 2 O 3 、CeO 2 、Pr 6 O 11 、Nd 2 O 3 、Sm 2 O 3 And Eu 2 O。
In an alternative embodiment, the heavy rare earth oxide comprises Gd 2 O 3 、Tb 4 O 7 、Dy 2 O 3 、Ho 2 O 3 、Er 2 O 3 、Tm 2 O 3 、Yb 2 O 3 、Lu 2 O 3 And Y 2 O 3 。
In an alternative embodiment, the total content of light rare earth oxides is obtained by summing the contents of all light rare earth oxides and the total content of heavy rare earth oxides is obtained by summing the contents of all heavy rare earth oxides.
In an optional embodiment, the minimum industrial grade of the light rare earth is 0.05wt% to 0.098wt%, and the minimum industrial grade of the heavy rare earth is 0.035wt% to 0.065wt%.
In an optional embodiment, the minimum industrial grade of the light rare earth is 0.05wt%, and the minimum industrial grade of the heavy rare earth is 0.035wt%.
In the alternative embodimentIn one embodiment, collecting data for a plurality of existing ion-adsorbing rare earth deposits comprises obtaining data from survey report queries for a plurality of known deposits or by calculation using equation iii:
wherein, TREO k Is the average grade (wt%) of the deposit; p k Is the ion phase proportion (%);
is the average rare earth oxide content of the parent ore.
In an optional embodiment, the method for collecting the content of the light rare earth oxide and the content of the heavy rare earth oxide of the granite to be detected includes performing statistical analysis on geochemical data of the granite to be detected or detecting the granite to be detected by using ICP-MS.
In a second aspect, the invention provides the application of the method for evaluating the ore forming potential of granite based on the characteristics of rare earth elements in ore deposit exploration.
In a third aspect, the invention provides a method for exploring an ion-adsorption type rare earth deposit, which comprises the method for evaluating the mineralization potential of granite based on the characteristics of rare earth elements according to any one of the above embodiments.
The invention has the following beneficial effects:
the application provides a method for assessing granite mineralization potential based on rare earth element characteristics can make full use of the whole-rock geochemical characteristics of granite to assess granite mineralization potential, the application starts from the mineralization mother rock of south China ion adsorption type rare earth ore, according to the average enrichment multiple of ore body and rare earth oxide of the mineralized granite, the lowest industrial grade is taken as an assessment standard, through analyzing the threshold value of the whole-rock rare earth oxide content and the ratio of the light rare earth oxide content to the heavy rare earth oxide content, the whole-rock rare earth element characteristic assessment standard is established for judging the mineralization potential of granite. This application can evaluate granite on the selected area whether it has the mineralization potentiality through to above-mentioned method, this can strengthen the understanding of staff to the granite, can continuously pay close attention to the granite that has the mineralization potentiality, and regularly gather the weathering crust sample of granite and test, thereby avoided having now all to gather and the work of judging a large amount and loaded down with trivial details to all granite, consequently, this application can realize helping the busy screening, assist the partial target object and the scope of actual reconnaissance, collect the existing geochemistry data of granite on the target area, evaluate according to the scheme of this application, if there is the mineralization potentiality after the evaluation, then can carry out the analysis on next step to this part granite, if there is not the mineralization potentiality after the evaluation, then can get rid of this part granite, reduce the scope of target granite during actual survey. If the granite on the target area has no geochemical data, the evaluation cannot be carried out, and the original method is needed to survey the condition of the ore body. The method has the characteristics of strong practicability and convenient and quick application, and can well screen possible ore forming target areas in a large area. According to the method, the granite with the mineralization potential can be screened out by carrying out the mineralization potential evaluation on the granite in advance, so that the granite is convenient to further explore, the exploration range is favorably narrowed, the exploration period is shortened, and the material and labor costs are reduced; granite with potential is screened rapidly and efficiently; the accuracy of the ore formation prediction is greatly improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic diagram illustrating classification of an mineralization potential projection diagram of a method for evaluating an mineralization potential of granite based on characteristics of rare earth elements, provided in embodiment 1 of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In a first aspect, the invention provides a method for evaluating the mineralization potential of granite based on rare earth element characteristics, which comprises the following steps:
(1) Data of a plurality of existing ion-adsorbing rare earth deposits are collected.
The ion adsorption type rare earth deposit in the application is a deposit which is published and reported at present, the ion adsorption type rare earth deposit comprises a plurality of light rare earth deposits and a plurality of heavy rare earth deposits, and the data comprises enrichment multiple R x The content of each light rare earth oxide and the content of each heavy rare earth oxide in the synthetic granite; the data can be directly obtained by inquiring the existing exploration report of each mineral deposit. When partial data is difficult to obtain, the average grade (TREO) of the deposit can be passed k wt%) and the ratio of ionic phases (P) k %) and rare earth oxide content of the mineralizing parent rock
The calculation is carried out according to the following formula:
wherein, TREO k Is the average grade (wt%) of the deposit; p k Is the ion phase proportion (%);
is the average rare earth oxide content of the parent ore. Wherein, TREO k And P k Is a constant obtained by a direct query,
is obtained by directly inquiring the content of each light rare earth oxide and the content of each heavy rare earth oxide in the obtained ore-forming granite.
In the present application, according to the rare earth elementLight rare earth elements and heavy rare earth elements are divided, wherein 6 kinds of La, ce, pr, nd, sm and Eu are light rare earth elements, 9 kinds of Gd, tb, dy, ho, er, tm, yb, lu and Y are heavy rare earth elements, and correspondingly, the light rare earth oxide comprises La, ce, pr, nd, sm and Eu which are heavy rare earth elements 2 O 3 、CeO 2 、Pr 6 O 11 、Nd 2 O 3 、Sm 2 O 3 And Eu 2 O 3 . The heavy rare earth oxide comprises Gd 2 O 3 、Tb 4 O 7 、Dy 2 O 3 、Ho 2 O 3 、Er 2 O 3 、Tm 2 O 3 、Yb 2 O 3 、Lu 2 O 3 And Y 2 O 3 。
(2) Calculating the average value R of the enrichment times of the light rare earth deposit L Average value of enrichment times R of heavy rare earth deposit H 。
Wherein, when the enrichment times are counted in the step (1), the ion adsorption type rare earth deposit comprises a plurality of light rare earth deposits and a plurality of heavy rare earth deposits, so that the light rare earth deposits and the heavy rare earth deposits are counted respectively, and the average value R of the enrichment times of the light rare earth deposits in the step is counted L The average value of the enrichment times of the heavy rare earth deposits R is obtained by adding and averaging the enrichment times of a plurality of light rare earth deposits H The enrichment multiples of a plurality of heavy rare earth deposits are added and averaged to obtain the rare earth mineral deposit.
(3) Calculating the total content threshold C of rare earth oxides in the light rare earth ore-forming granite according to the formula I and the formula II sL Threshold C of total content of rare earth oxides in heavy rare earth and synthetic granite sH Wherein, formula I is: c sL ×R L = minimum industrial grade of light rare earth deposit, formula II is C sH ×R H = minimum industrial grade of heavy rare earth deposit;
the minimum industrial grade is specified in the geological exploration standard of the rare earth mineral deposit, in the application, the minimum industrial grade of the light rare earth mineral deposit is 0.05wt% -0.098wt%, and the minimum industrial grade of the heavy rare earth mineral deposit is 0.035wt% -0.065wt%. Preferably, the minimum value specified in the rare earth mineral geological survey specification is taken as the optimal value, specifically, the minimum industrial grade value of the light rare earth is 0.05wt%, and the minimum industrial grade value of the heavy rare earth is 0.035wt%.
(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 granite of a plurality of heavy rare earth ore deposits LREO/HRYO At the highest Y LREO/HRYO(MAX) As a critical value.
The total content of the light rare earth oxides is obtained by adding the contents of all the light rare earth oxides obtained in the step (1), and the total content of the heavy rare earth oxides is obtained by adding the contents of all the heavy rare earth oxides, wherein the highest Y is used in the application LREO/HRYO(MAX) As a critical value.
Generally speaking, the ratio of the total content of the light rare earth oxide to the total content of the heavy rare earth oxide in the ore body is more than 1 or less than 1 as a critical value to distinguish whether the ore body is an ore body mainly containing the light rare earth oxide (more than 1) or an ore body mainly containing the heavy rare earth oxide (less than 1), but in the weathering process of the ore body, ce in the light rare earth element can escape from the light rare earth element and can partially gather in the shallow part of the weathering crust without being in the ore body, so the Ce content in the deep ore body can be reduced, therefore, when the ratio of the light rare earth oxide in the rock body is more than 1 (about 1.3), the ratio of the light rare earth oxide to the heavy rare earth oxide in the rock body can reach 1, that is, the ratio of the light rare earth oxide to the heavy earth oxide in the rock body is less than the ratio of the light rare earth oxide to the heavy rare earth oxide in the ore body, therefore, the highest Y is the highest in the present application LREO/HRYO(MAX) As a critical value, when the ratio of the rock mass is lower than the highest Y in the ore body LREO/HRYO(MAX) When the method is used, the content of the heavy rare earth oxide is judged to be larger than that of the light rare earth oxide after the rock is mineralized, so that the method has the potential of the mineralized heavy rare earth ore body. When the ratio of rock mass is higher than the highest Y in ore body LREO/HRYO(MAX) When the method is used, the content of the light rare earth oxide after the rock mass is mineralized is judged to be larger than that of the heavy rare earth oxide, so that the rock mass possibly has the potential of being mineralized into a light rare earth ore body.
(5) Collecting multiple samples of granite to be measured, and counting for each sampleThe content of each light rare earth oxide and the content of each heavy rare earth oxide in one sample are counted, and the total content sigma REO of the rare earth oxide of each sample of the granite to be detected and the average content sigma REO of the rare earth oxide of the granite to be detected are calculated
And the ratio X of the sum of the total contents of the light rare earth oxides to the sum of the total contents of the heavy rare earth oxides LREO/HRYO (ii) a Collecting a plurality of samples of granite to be detected, counting the content of each light rare earth oxide and the content of each heavy rare earth oxide in each sample, and calculating the total content Sigma REO of the rare earth oxide of each sample of the granite to be detected, the ratio X of the sum of the total content Sigma REO of the light rare earth oxide and the total content of the heavy rare earth oxide to the sum of the total content of the heavy rare earth oxide LREO/HRYO The total rare earth oxide content of the plurality of samples is then summed and averaged to obtain an average rare earth oxide content
For a plurality of samples X LREO/HRYO Performing addition and average to obtain
To be provided with
And
the measured granite is used as an evaluation index of the granite to be measured;
the method for collecting the content of the light rare earth oxide and the content of the heavy rare earth oxide of the granite to be detected comprises the steps of carrying out statistical analysis on geochemical data of the granite to be detected or detecting the granite to be detected by utilizing ICP-MS.
(6) Comparison
C sL And C sH Simultaneously comparing
And Y LREO/HRYO(MAX) ，
When in use
Greater than C sL And is
Greater than Y LREO/HRYO(MAX) Then, the granite to be detected is evaluated to have the light rare earth mineralization potential;
when in use
Greater than C sH And is provided with
Less than Y LREO/HRYO(MAX) And then, the granite to be detected is evaluated to have the heavy rare earth mineralization potential.
It should be understood that the design principle of the present application is: the ion adsorption type rare earth deposit is positioned in a weathering crust, the weathering crust is formed by weathering of rock masses below, granite continuously rises upwards in the weathering process, the weathering crust is continuously accumulated to finally form the deposit, and therefore an enrichment multiple R can be formed between the weathering crust and the rock masses x Since the light rare earth deposit and the heavy rare earth deposit are distinguished in the geological survey specification of the rare earth mineral products, the application also correspondingly distinguishes the light rare earth deposit R L And heavy rare earth deposit R H In general, the light rare earth deposit R L Specific gravity rare earth deposit R H The smaller the content of rare earth oxide, the smaller the content of rare earth oxide in the light rare earth rock mass is, the industrial grade can be reached on a smaller enrichment factor, so as to form the light rare earth ore body, while the heavy rare earth ore deposit is hard to obtain the rock mass per se, and the content of rare earth elements is also lower, so that the ore can be formed by the higher enrichment factor. Thus, the application is provided with C sL And C sH Is provided with C sL And C sH The aim of (A) is that the higher the content of rare earth oxides, the higher they are under the same climatic conditionsThe enrichment times are lower, and the ore can be formed, so that the lowest critical value is set as an evaluation standard in the application.
In addition, the application also provides application of the method for evaluating the granite mineralization potential based on the rare earth element characteristics in mineral deposit exploration, and specifically, for example, the invention provides an ion adsorption type rare earth mineral deposit exploration method which comprises the method for evaluating the granite mineralization potential based on the rare earth element characteristics. By carrying out mineralization potential evaluation on granite in advance, granite with mineralization potential can be screened out, further exploration for the granite is facilitated, the exploration range is favorably narrowed, the exploration period is shortened, and the material and labor costs are reduced; granite with potential is screened rapidly and efficiently; the accuracy of the ore formation prediction is greatly improved.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
The embodiment provides a method for evaluating the ore forming potential of granite based on rare earth element characteristics, which takes an ion adsorption type rare earth ore deposit in a Guangdong-Gui area as an existing ion adsorption type rare earth ore deposit to realize the analysis of the ore forming potential of the granite to be detected. The method specifically comprises the following steps:
(1) The data of a plurality of existing ion adsorption type rare earth ore deposits are collected and counted in a table 1, the content of each rare earth oxide of the mineralized granite, the type and enrichment times of the ore deposits formed by the mineralized granite can be inquired through inquiry, and the total content ratio of the following light rare earth oxides and heavy rare earth oxides is calculated through the content of each rare earth oxide.
TABLE 1 data statistics table of existing ion adsorption type rare earth deposit
The data of the existing ion adsorption type rare earth deposit is obtained by retrieving the content of each rare earth oxide of the mineralized granite and the type of the deposit formed by the content through a search article and obtaining the data through routine calculation.
Specifically, for example, the calculation result of the rare earth deposit of the mountain weight of the steamed bread is taken as an example:
the raw data obtained by inquiring the heavy rare earth deposit of the steamed bun mountain are as follows:
TABLE 2 statistical table of original data obtained by inquiring heavy rare earth deposit in steamed bread
The sum of the total contents of the light rare earth oxides and the sum of the total contents of the heavy rare earth oxides, and the ratio X of the two LREO/HRYO And the total content sigma REO of the rare earth oxide is calculated, and the calculation result is as follows:
TABLE 3 data calculation results of heavy rare earth deposits in steamed bread mountain
Average rare earth oxide content of rock mass of steamed bread
The formula for calculating the enrichment factor of the rock mass of the steamed bun is
Wherein TREO is a constant of 0.096wt%, P is a constant of 84.28%, and the calculation result is
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。
The rest of the deposit is calculated according to the above calculation mode, and is not explained in a specific way.
(2) Calculating the average value of the enrichment times of the light rare earth deposit and the average value of the enrichment times of the heavy rare earth deposit, wherein 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。
(3) Calculating the total content threshold C of the rare earth oxides in the light rare earth ore-forming granite according to the formula I and the formula II sL Threshold C of total content of rare earth oxides in heavy rare earth and synthetic granite sH Wherein, formula I is: c sL ×R L = minimum industrial grade of light rare earth deposit, formula II is C sH ×R H = minimum industrial grade of heavy rare earth deposit;
in the embodiment, the minimum industrial grade of the light rare earth is 0.05wt%, the minimum industrial grade of the heavy rare earth is 0.035wt%, and C is obtained by calculation sL ＝0.05/2.71＝0.0185％，C sH ＝0.035/4.36＝0.0080％。
(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 granite of a plurality of heavy rare earth ore deposits LREO/HRYO At the highest Y LREO/HRYO(MAX) As a critical value;
as shown in Table 1, Y of the heavy rare earth deposit in steamed bread LREO/HRYO Y of 1.33, back Top heavy rare earth deposit of Zizhai LREO/HRYO Is 0.57, and therefore, 1.33 is regarded as Y in this example LREO/HRYO(MAX) 。
(5) The content of each light rare earth oxide and the content of each heavy rare earth oxide of the granite (the Liangyang rock mass in southwest and western China) to be tested are collected, and the collection results are shown in table 4:
TABLE 4. Light rare earth oxide content statistical table of granite to be measured
TABLE 5 statistical table of the contents of heavy rare earth oxides in granite to be measured
The total content of the light rare earth oxides, the total content of the heavy rare earth oxides and the ratio X of the total content of the light rare earth oxides to the total content of the heavy rare earth oxides of the granite to be measured are calculated by converting the contents of the light rare earth elements and the heavy rare earth elements in the tables 4 and 5 and the oxides thereof LREO/HRYO And the total content Σ REO of rare earth oxide of the granite to be measured, please refer to table 6 for the calculation result;
TABLE 6 Sigma REO and X of granite to be tested LREO/HRYO Statistical table of calculation results
Where LREO is the sum of all light rare earth oxide contents in each sample:
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))。
HRYO is the sum of all heavy rare earth oxide contents in each sample:
HRYO＝Gd/(157.25*2/(157.25*2+15.9994*3))+Tb/(158.9253*4/(158.9253*4+15.9994*7))+Dy/(162.5*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))。
X LREO/HRYO is the ratio of the sum of the contents of the light rare earth oxides to the sum of the contents of the heavy rare earth oxides of each sample, X LREO/HRYO ＝LREO/HRYO。
∑REO(wt％)＝(LREO+HRYO)/100×100％。
Because in this application, the granite that awaits measuring has gathered the data of 17 samples, consequently, calculate the X of these 17 samples LREO/HRYO Mean and sigma REO mean
As a diluent of the granite to be measured
And (4) evaluation indexes of the total content of the earth oxides.
Wherein, X LREO/HRYO Mean value of
Is 3.044117647;
(6) Comparison
C sL And C sH Simultaneously comparing
And Y LREO/HRYO(MAX) ，
The comparison basis is as follows: when in use
Greater than C sL And is
Greater than Y LREO/HRYO(MAX) Then, the granite to be detected is evaluated to have the light rare earth mineralization potential; when in use
Greater than C sH And is
Less than Y LREO/HRYO(MAX) And then, the granite to be detected is evaluated to have the heavy rare earth mineralization potential. Wherein, C sL ＝0.0185％，C sH ＝0.0080％，Y LREO/HRYO(MAX) ＝1.33。
The comparison result is:
greater than C sL And is
Are all greater than Y LREO/HRYO(MAX) The granite to be tested is evaluated to have the light rare earth mineralization potential, and the picture input result please refer to fig. 1. Furthermore, the granite to be detected selected by the method is verified to be a light rare earth deposit, namely a ancient city deposit, so that the evaluation method is fully proved to be in line with the actual mineralization condition and can be used as a method for evaluating the mineralization potential of the granite.
To sum up, the method for evaluating the granite mineralization potential based on the rare earth element characteristics can fully utilize the whole-rock geochemical characteristics of granite to evaluate the granite mineralization potential, starts from the mineralized mother rock of the south China ion adsorption type rare earth ore, 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 rare earth oxide content according to the average enrichment times of the ore body and the rare earth oxide of the mineralized granite and taking the lowest industrial grade as the evaluation standard so as to judge the granite mineralization potential. According to the method, whether the granite on the selected area has the mineralization potential can be evaluated, the knowledge of workers on the granite can be enhanced, the granite with the mineralization potential can be continuously concerned, weathering crust samples of the granite are collected regularly to be tested, and therefore a large amount of tedious work of collecting and judging all the granite is avoided. If the granite on the target area has no geochemical data, the evaluation cannot be carried out, and the original method is needed to survey the condition of the ore body. The method has the characteristics of strong practicability and convenient and quick application, and can well screen possible ore forming target areas in a large area. According to the method, the granite with the mineralization potential can be screened out by carrying out the mineralization potential evaluation on the granite in advance, so that the granite is convenient to further explore, the exploration range is favorably narrowed, the exploration period is shortened, and the material and labor costs are reduced; granite with potential is screened rapidly and efficiently; the accuracy of the ore formation prediction is greatly improved.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for evaluating the mineralization potential of granite based on the characteristics of rare earth elements is characterized by comprising the following steps:
(1) Collecting data of a plurality of existing ion-adsorption rare earth deposits, wherein the ion-adsorption rare earth deposits comprise a plurality of light rare earth deposits and a plurality of heavy rare earth deposits, and the data comprise enrichment timesNumber R x The content of each light rare earth oxide and the content of each heavy rare earth oxide in the synthetic granite;
(2) Calculating the average value R of the enrichment times of the light rare earth deposit L And the mean value of the enrichment times R of the heavy rare earth deposit H ；
(3) Calculating the total content threshold C of rare earth oxides of the light rare earth ore-forming granite according to the formula I and the formula II sL Total content threshold C of rare earth oxide of heavy rare earth and synthetic granite sH Wherein, formula I is: c sL ×R L = minimum industrial grade of light rare earth deposit, formula II is C sH ×R H = minimum industrial grade of heavy rare earth deposit;
(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 mined granite of the heavy rare earth deposits LREO/HRYO At the highest Y LREO/HRYO(MAX) As a critical value;
(5) Collecting a plurality of samples of granite to be detected, counting the content of each light rare earth oxide and the content of each heavy rare earth oxide in each sample, and calculating the total content Sigma REO of the rare earth oxide of each sample of the granite to be detected, the ratio X of the sum of the total content Sigma REO of the light rare earth oxide and the total content of the heavy rare earth oxide to the sum of the total content of the heavy rare earth oxide LREO/HRYO The average rare earth oxide content is obtained by adding and averaging the total rare earth oxide content of a plurality of samples
For a plurality of X LREO/HRYO Performing addition and average to obtain
To be provided with
And
as a comment on the granite to be measuredA price index;
(6) Comparison
C sL And C sH Simultaneously comparing
And Y LREO/HRYO(MAX) ；
When in use
Greater than C sL And is
Greater than Y LREO/HRYO(MAX) Then, the granite to be detected is evaluated to have the light rare earth mineralization potential;
when in use
Greater than C sH And is
Less than Y LREO/HRYO(MAX) And then, the granite to be detected is evaluated to have the heavy rare earth mineralization potential.
2. The method for assessing mineralization of granite based on rare earth element signatures of claim 1, wherein the light rare earth oxide comprises La 2 O 3 、CeO 2 、Pr 6 O 11 、Nd 2 O 3 、Sm 2 O 3 And Eu 2 O 3 。
3. The method for assessing the mineralizing potential of granite based on rare earth element characteristics of claim 1, wherein the heavy rare earth oxide comprises Gd 2 O 3 、Tb 4 O 7 、Dy 2 O 3 、Ho 2 O 3 、Er 2 O 3 、Tm 2 O 3 、Yb 2 O 3 、Lu 2 O 3 And Y 2 O 3 。
4. The method for assessing the mineralization potential of granite based on the characteristics of rare earth elements as claimed in claim 1, wherein the total content of light rare earth oxides is obtained by summing the contents of all light rare earth oxides and the total content of heavy rare earth oxides is obtained by summing the contents of all heavy rare earth oxides.
5. The method for evaluating the ore forming potential of granite based on the characteristics of rare earth elements as claimed in claim 1, wherein the minimum industrial grade of light rare earth is 0.05wt% -0.098wt%, and the minimum industrial grade of heavy rare earth is 0.035wt% -0.065wt%.
6. The method for evaluating the mineralization potential of granite based on the characteristics of rare earth elements according to claim 5, wherein the minimum industrial grade of the light rare earth is 0.05wt% and the minimum industrial grade of the heavy rare earth is 0.035wt%.
7. The method of claim 1, wherein collecting data of a plurality of existing ion-adsorbing rare earth deposits comprises obtaining from survey report queries of a plurality of known deposits or by calculation of formula iii, wherein formula iii is:
wherein, TREO k Is the average grade (wt%) of the deposit; p is k Is the ion phase proportion (%);
is the average rare earth oxide content of the parent ore.
8. The method for evaluating the mineralization potential of granite based on the characteristics of rare earth elements of claim 1, wherein the collection method of the content of light rare earth oxides and the content of heavy rare earth oxides of the granite to be detected comprises statistical analysis of the geochemical data of the granite to be detected or detection of the granite to be detected by ICP-MS.
9. Use of a method for assessing the mineralization potential of granite based on rare earth elements as defined in any one of claims 1 to 8 in the exploration of mineral deposits.
10. A method for exploring an ion-adsorbing type rare earth deposit, comprising the method for evaluating the mineralization potential of granite based on the characteristics of rare earth elements as set forth in any one of claims 1 to 8.
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