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CN-122017202-A - Method and device for judging potential of lithium ore in pegmatite, electronic equipment and storage medium

CN122017202ACN 122017202 ACN122017202 ACN 122017202ACN-122017202-A

Abstract

The invention provides a method, a device, electronic equipment and a storage medium for judging the lithium ore potential in pegmatite, which can indirectly and rapidly judge the lithium ore potential of granite pegmatite by analyzing the geochemical characteristics of key minerals, muscovite and potassium feldspar in pegmatite, namely the ratio of major elements to trace elements, and can partially convert pegmatite type lithium ore exploration from 'physical labor' relying on a large amount of stepping investigation verification to 'intelligent diagnosis' based on a geochemical model, thereby promoting realization of more accurate, faster and more economical ore finding breakthrough in the mineral exploration industry.

Inventors

  • WANG HE
  • YAN QINGHE
  • BAI HONGYANG
  • CHEN CHEN
  • ZHANG RONGQING
  • SUN ZHIQIANG

Assignees

  • 中国科学院广州地球化学研究所

Dates

Publication Date
20260512
Application Date
20260320

Claims (10)

  1. 1. The method for judging the potential of the lithium ore in the pegmatite is characterized by comprising the following steps of: step S1, based on the content of main elements and microelements of muscovite and potassium feldspar in a target investigation region granite peganite sample, respectively obtaining the ratio of the main elements and microelements of muscovite and potassium feldspar; S2, constructing a lithium ore potential theoretical marking line based on the separation crystallization degree F by adopting a Rayleigh separation crystallization law based on the ratio of the main element to the trace element; s3, based on the ratio of the main element to the trace element, taking the separation crystallization degree F as a variable, and adopting a Rayleigh separation crystallization law to respectively obtain actual concentration curves of the main element and the trace element; And S4, constructing a lithium ore potential judgment standard in the lithium ore potential theoretical marked line and the actual concentration curve, and judging the lithium ore potential of the standard target exploration area granite peganine rock sample based on the lithium ore potential.
  2. 2. The method for judging the potential of lithium ores in pegmatite according to claim 1, wherein the construction of the theoretical reticle for potential of lithium ores comprises the following steps: A1, constructing a concentration change relation between element concentration and separation crystallization degree F in crystallized minerals based on a Rayleigh Li Fenliu law; A2, performing linear fitting on the concentration change relation to obtain an initial linear relation of the principal elements and the microelements; a3, setting an average distribution coefficient of the principal elements to be close to 1 in a wide range, and optimizing the linear relation to obtain an optimal linear relation; And A4, constructing a lithium ore potential theoretical marking line based on the optimal linear relation.
  3. 3. The method of determining the potential of lithium ores in pegmatite according to claim 2, wherein the concentration variation relationship comprises: ; In the formula, Is an element In minerals Concentration in (a); is the initial concentration of the element in the parent melt; Is the degree of separation crystallization; Is an element Average distribution coefficient of (a); = For the actual partition coefficient of element i in mineral j in the crystalline or melt state.
  4. 4. The method for judging the potential of lithium ores in pegmatite according to claim 2, wherein the potassium feldspar has a main element of potassium K and a trace element of rubidium Rb, and the initial linear relation comprises: log( ∕ ) = A.log( ) + [log( .Kd,k) - (1 + A).log( .Kd,Rb)]; Wherein A is slope, A= (DK-DRb)/(DRb-1), DK is average distribution coefficient of potassium element K, and DRb is average distribution coefficient of rubidium element; the initial concentration of rubidium element in the mother melt; The concentration of rubidium element; Is the initial concentration of potassium element in the mother melt; The main element of the muscovite is potassium K, and the trace element is cesium Cs, and the initial linear relation comprises: log( ∕ ) = A.log( ) + [log( .Kd,k) - (1 + A).log( .Kd,Cs)] ; wherein A is slope, A= (DK-DCs)/DCs-1, DCs are average distribution coefficient of cesium element; Is the concentration of cesium; Is the initial concentration of cesium in the parent melt.
  5. 5. The method according to claim 4, wherein when the total distribution coefficient DK of the main element K approaches 1 and the slope a of the initial linear relationship approaches-1, the optimal linear relationship of log (K/Rb or Cs) to the rubidium element Rb or cesium element Cs comprises: log( ∕ ) = -log( ) +log( .Kd,k)。
  6. 6. The method for determining the potential of lithium ore in pegmatite according to claim 1, wherein the step S3 is performed to obtain the theoretical concentration of potassium element as a main element in muscovite, and the method comprises the following steps: ; In the formula, The actual distribution coefficient of potassium element in the muscovite is obtained; Is the initial concentration of potassium element in the muscovite in the mother melt; the average distribution coefficient of potassium element in the muscovite is obtained; for separation of the degree of crystallization, and 0< F <1; When the theoretical concentration of trace element cesium in muscovite is obtained, the method comprises the following steps: ; In the formula, The actual partition coefficient of cesium in the muscovite; is the initial concentration of cesium in the muscovite in the parent melt; An average partition coefficient of cesium in the muscovite, and 0< F <1; When the theoretical concentration of trace elements rubidium element in muscovite is obtained, the method comprises the following steps: ; In the formula, The actual distribution coefficient of rubidium element in the muscovite; Is the initial concentration of rubidium element in muscovite in the mother melt; the average distribution coefficient of rubidium element in the muscovite is 0< F <1; when the theoretical concentration of potassium element in the potassium feldspar is obtained, the method comprises the following steps: ; In the formula, The actual distribution coefficient of potassium element in the potassium feldspar; Is the initial concentration of potassium element in the potassium feldspar in the mother melt; the average distribution coefficient of potassium element in the potassium feldspar is 0< F <1; when the theoretical concentration of trace elements rubidium in potassium feldspar is obtained, the method comprises the following steps: ; In the formula, The actual distribution coefficient of rubidium element in the potassium feldspar; the initial concentration of rubidium element in the potassium feldspar in the mother melt; the average distribution coefficient of rubidium element in potassium feldspar is 0< F <1; when the theoretical concentration of trace element cesium in potassium feldspar is obtained, the method comprises the following steps: ; In the formula, The actual distribution coefficient of cesium in the potassium feldspar; is the initial concentration of cesium in the potassium feldspar in the parent melt; The average distribution coefficient of cesium in the potassium feldspar is 0< F <1.
  7. 7. The method of claim 1, wherein the lithium mineral potential determination criteria comprises: if the granite peganum sample in the target investigation region meets the following conditions: the concentration of the trace element rubidium Rb is more than 5704ppm, The concentration of the trace element cesium Cs is more than 5704ppm, and the separation crystallization degree F is more than 0.99, so that the mineral-forming peganite muscovite is obtained; if the granite peganum sample in the target investigation region meets the following conditions: the concentration of the trace element rubidium Rb is more than 4765ppm, The concentration of the trace element cesium Cs is more than 140ppm, and the separation crystallization degree F is more than 0.99, so that the potassium feldspar in the mineral-forming peganite is obtained.
  8. 8. A device for determining the potential of lithium ores in pegmatite, characterized in that the method for determining the potential of lithium ores in pegmatite according to any of claims 1 to 7 comprises: the pretreatment unit is configured to obtain the ratio of the main element to the trace element in the muscovite and the potassium feldspar respectively based on the contents of the main element and the trace element in the muscovite and the potassium feldspar in the granite peganite sample of the target investigation region; The marking construction unit is configured to construct a lithium ore potential theoretical marking based on the separation crystallization degree F by adopting a Rayleigh separation crystallization law based on the ratio of the main element to the trace element; the curve construction unit is configured to respectively obtain actual concentration curves of the main element and the trace element by taking the separation crystallization degree F as a variable and adopting a Rayleigh separation crystallization law based on the ratio of the main element to the trace element; And the output unit is configured to construct a lithium ore potential judging standard from the lithium ore potential theoretical marked line and the actual concentration curve, and judge the lithium ore potential of the standard target exploration area granite peganite sample based on the lithium ore potential.
  9. 9. An electronic device, characterized in that, the electronic device includes: at least one processor, and A memory communicatively coupled to the at least one processor, wherein, The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of determining the lithium mineral potential in pegmatite according to any one of claims 1 to 7.
  10. 10. A non-transitory computer readable storage medium storing computer instructions for causing the computer to perform the method of determining the lithium mineral potential in pegmatite according to any one of claims 1 to 7.

Description

Method and device for judging potential of lithium ore in pegmatite, electronic equipment and storage medium Technical Field The invention relates to the technical field of rare metal pegmatite type lithium ore geological exploration and mineral resource evaluation, in particular to a method, a device, electronic equipment and a storage medium for judging lithium ore potential in pegmatite. Background The pegmatite type lithium ore is used as an important hard rock type lithium resource and plays a key role in new energy strategy. With the rapid development of new energy automobiles and energy storage industry, lithium has become an indispensable "white petroleum". The peganite type lithium ore resource reserves are rich, and the recent resource reserves are greatly developed, for example, the lithium oxide resource amount is found out to be 112.07 ten thousand tons in the accumulation of the lithium ores in the dam of the Sichuan Markov, and the granite peganite type lithium ore deposit with the largest resource amount is found out in Asia. The existing research shows that the distribution behavior of rubidium Rb and cesium Cs in potassium feldspar and muscovite is controlled by crystallization sequence, rb and Cs in late-stage crystallized minerals are enriched, the ratio of K/Rb and K/Cs is reduced, and the evolution degree of magma can be effectively indicated. However, no discrimination criteria related to the degree of lithium enrichment and the mineral geochemical index of the system are formed at present, so that the screening efficiency of the exploration target area is low. The traditional exploration method seriously depends on a large amount of drilling and core analysis, and has high cost, long period, low operation efficiency and large potential safety hazard in the areas with high and cold plateau, strong terrain cutting and wide fourth system coverage. Therefore, the present application contemplates a method for rapidly discriminating the potential of the pegmatite-type lithium ores by the K/Rb and K/Cs ratios of the muscovite and potash feldspar minerals. Disclosure of Invention Aiming at the problems in the prior art, the invention provides a method, a device, electronic equipment and a storage medium for judging the potential of lithium ores in pegmatite, which are suitable for severe cold deep cutting areas and coverage areas, and aim to quickly define a remote scenic spot by combining geochemical index analysis so as to provide a preferable target area for subsequent engineering verification, thereby remarkably reducing the exploration cost, improving the prospecting efficiency and solving the problem of high prospecting blindness in the prior art. In a first aspect, an embodiment of the present invention provides a method for determining a lithium mineral potential in pegmatite, including the steps of: step S1, based on the content of main elements and microelements of muscovite and potassium feldspar in a target investigation region granite peganite sample, respectively obtaining the ratio of the main elements and microelements of muscovite and potassium feldspar; S2, constructing a lithium ore potential theoretical marking line based on the separation crystallization degree F by adopting a Rayleigh separation crystallization law based on the ratio of the main element to the trace element; s3, based on the ratio of the main element to the trace element, taking the separation crystallization degree F as a variable, and adopting a Rayleigh separation crystallization law to respectively obtain actual concentration curves of the main element and the trace element; And S4, constructing a lithium ore potential judgment standard in the lithium ore potential theoretical marked line and the actual concentration curve, and judging the lithium ore potential of the standard target exploration area granite peganine rock sample based on the lithium ore potential. Further, when constructing the lithium ore potential theoretical reticle, the method comprises the following steps: A1, constructing a concentration change relation between element concentration and separation crystallization degree F in crystallized minerals based on a Rayleigh Li Fenliu law; A2, performing linear fitting on the concentration change relation to obtain an initial linear relation of the principal elements and the microelements; a3, setting an average distribution coefficient of the principal elements to be close to 1 in a wide range, and optimizing the linear relation to obtain an optimal linear relation; And A4, constructing a lithium ore potential theoretical marking line based on the optimal linear relation. Further, the concentration variation relation includes: ; In the formula, Is an elementIn mineralsConcentration in (a); is the initial concentration of the element in the parent melt; Is the degree of separation crystallization; Is an element Average distribution coefficient of (a);= For the actual partition coeffi