CN113092725A - Method for determining mineralized microfossicles and application - Google Patents
Method for determining mineralized microfossicles and application Download PDFInfo
- Publication number
- CN113092725A CN113092725A CN202110382378.2A CN202110382378A CN113092725A CN 113092725 A CN113092725 A CN 113092725A CN 202110382378 A CN202110382378 A CN 202110382378A CN 113092725 A CN113092725 A CN 113092725A
- Authority
- CN
- China
- Prior art keywords
- uranium
- pyrite
- mineralized
- determining
- sandstone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/22—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
- G01N23/225—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using electron or ion
- G01N23/2251—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material using electron or ion using incident electron beams, e.g. scanning electron microscopy [SEM]
Abstract
The invention provides a method for determining mineralized microfossicles and application thereof, wherein the method for determining mineralized microfossicles comprises the following steps: crushing the uranium-containing sandstone to obtain crushed uranium-containing sandstone; collecting pyrite particles in the crushed uranium-containing sandstone; collecting uranium-containing pyrite particles in the pyrite particles; and preliminarily determining the mineralized microfossicles according to the mineral structure with the bacterial morphology on the surface of the uranium-containing pyrite particle. And further analyzing the lattice distance, crystal and element of the 'mineralized microfossicle' by transmission electron microscopy to verify that it is a true mineralized microfossicle. The method is beneficial to finding and obtaining the mineralized microfossils in the uranium ores in the uranium-bearing sandstone, so that the mineralization mechanism of sandstone-type uranium ores can be comprehensively analyzed according to the mineralized microfossils, and the basic distribution rule of the uranium ores can be determined.
Description
Technical Field
The invention relates to a determination method, in particular to a determination method and application of mineralized microfossicles, and belongs to the technical field of oil and gas geochemistry.
Background
The mineral deposits made of metal sulfides such as Pb, Zn, and Fe, and the mineral deposits made of simple Au and U oxides, etc., are formed by hot liquid at high temperature, or by microorganisms at low temperature, and the cause of the mineral deposits is related to different mineral formation modes and mineral exploration directions, so that it is of great significance to determine the mineral formation cause of the mineral deposits.
At the present stage, the mineralization temperature is determined by indirect methods such as the homogenization temperature of a symbiotic mineral fluid inclusion, oxygen isotope and the like, so that an mineralization mode is established according to the mineralization temperature. However, the method using fluid inclusions is premised on the availability of fluid inclusions in these minerals, which are opaque and often have very small crystals in the deposit, and thus cannot be used for their fluid inclusions.
In addition to this, if a fossilized, i.e. mineralized microfossil, of microorganisms can be found in the deposit, it can be determined that it is formed by the mechanism of the low temperature microorganisms. A small number of microbially bacteriosed mineral structures have now been reported, but considering the low content of metal minerals in rocks. For example, in sandstone-type uranium deposits, the uranium element content rarely exceeds 1000ppm, and the 1000ppm uranium element may only be<1% uranium can form fossil. Thus, we can estimate that the probability of observing microfossicles is about 1 × 10 when the whole rock is observed by a scanning electron microscope-5。
Disclosure of Invention
The invention provides a method for determining mineralized micro fossil, which is beneficial to discovering and obtaining the mineralized micro fossil in uranium ore in uranium-containing sandstone, so that the mineralization mechanism and the basic distribution rule of sandstone-type uranium ore can be comprehensively analyzed according to the mineralized micro fossil.
The invention also provides application of the method for determining mineralized microfalites in researching an mineralization mechanism, so that important mineral exploration clues and mineral exploration directions are provided for sandstone-type uranium ore exploration.
The invention provides a method for determining mineralized microfossicles, which comprises the following steps:
crushing the uranium-containing sandstone to obtain crushed uranium-containing sandstone;
collecting pyrite particles in the crushed uranium-containing sandstone;
collecting uranium-containing pyrite particles in the pyrite particles;
and determining the mineralized microfossicles according to the mineral structure with the bacterial morphology on the surface of the uranium-containing pyrite particle.
The method for determining mineralized microvillites as described above, wherein the bacterial morphology comprises at least one of rod-like, spherical, and dumbbell-like shapes.
The method for determining mineralized microfracts as described above, wherein the determining mineralized microfracts according to the mineral structure with bacterial morphology on the surface of the uranium-containing pyrite particle includes:
carrying out first morphology detection on the rock surface of the uranium-containing pyrite particles to obtain target uranium-containing pyrite;
performing second appearance detection on the target uranium-containing pyrite to obtain the mineralized microfracture;
wherein the surface of the target uranium-containing pyrite has a mineral structure with a bacterial morphology.
The method for determining mineralized micro fossil, wherein the pulverization treatment comprises pulverizing the uranium-containing sandstone into particles with a size of 60-80 meshes.
The method for determining mineralized micro fossil, wherein the collecting the pyrite particles in the crushed uranium-containing sandstone includes:
washing the crushed uranium-containing sandstone with water to obtain heavy minerals;
and detecting and separating the heavy minerals by using a binocular microscope to obtain the pyrite particles.
The method for determining mineralized micro fossil, wherein the collecting the uranium-containing pyrite particles in the pyrite particles comprises:
carrying out gold spraying treatment on the surfaces of the pyrite particles to obtain gold-sprayed pyrite;
and detecting the gold spraying-pyrite particles by using an energy spectrum scanning electron microscope to obtain the uranium-containing pyrite particles.
The method for determining mineralized micro fossil as described above, wherein the content of uranium in the uranium-containing sandstone is greater than 1000 ppm.
The method for determining mineralized microvillites as described above, wherein the thickness of the gold coating layer in the gold-sprayed pyrite is 9-11 nm.
The method for determining mineralized microvillites as described above, wherein the first morphology detection and the second morphology detection are performed by using a scanning electron microscope.
The invention also provides an application of the method for determining mineralized microfossicles in researching mineralization mechanisms.
The implementation of the invention has at least the following advantages:
the method for determining the mineralized micro fossil provided by the invention takes the pyrite in the uranium-containing sandstone as a medium, and can be used for efficiently observing and effectively collecting the mineralized micro fossil in the uranium ore by performing a series of treatments on the pyrite in the uranium-containing sandstone, thereby being beneficial to truly reflecting the formation mechanism of the uranium ore in the sandstone.
According to the method for determining the mineralized micro fossil, the mineralized micro fossil in the uranium-containing sandstone is collected, so that reduction and analysis are facilitated, whether microorganisms exist in the environment in the mineralization period or not is analyzed, the type of the microorganisms is deduced by combining geochemical analysis, and the effect of the microorganisms in the mineralization process is determined. The mineralization environment is very similar to the earth environment with early hypoxia and profuse prokaryotes, provides a similar object for scientists to research the conditions and evolution of the early earth surface environment, and promotes the development of the environmental evolution research in the geological history period.
The method for determining the mineralized microfossicles can clarify the mechanism of the transformation effect of microorganisms and organic matters in the sandstone diagenesis process, provide strong evidence and explain the current environmental characteristics.
The method for determining mineralized micro fossil is beneficial to realizing efficient analysis and summary of an ore forming mechanism and a basic distribution rule of the sandstone-type uranium ore, and further can provide important ore finding clues and ore finding directions for the sandstone-type uranium ore.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the related art, the drawings used in the description of the embodiments of the present invention or the related art are briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a field emission scanning electron mirror backscatter map of part ZKA151-39 gray sandstone in uranium eastern win ore;
FIG. 2 is a field emission scanning electron mirror backscatter map of part ZKA151-39 gray sandstone in the uranium eastern win ore;
FIG. 3 is a field emission scanning electron mirror backscatter view of a portion of ore-rich sandstone from a uranium mine in a Qian's shop under sample number 410102;
fig. 4 is a field emission scanning electron microscope secondary electron image of uranium fossil in the target uranium-containing pyrite obtained from the uranium-containing sandstone in fig. 3;
FIG. 5 is a power spectrum diagram of a field emission scanning electron microscope of uranium fossils in the target uranium-bearing pyrite of FIG. 4;
fig. 6 is a field emission scanning electron microscope image of uranium fossil in target uranium-containing pyrite obtained from a partial ore-rich sandstone of a uranium store with sample number 410102;
FIG. 7 is a power spectrum diagram of a field emission scanning electron microscope of uranium fossils in the target uranium-bearing pyrite of FIG. 6;
FIG. 8 is a field emission scanning electron microscope secondary electron image of rod-shaped uranium fossil obtained from uranium-bearing pyrite of a part of ZKA147-39 sandstone target in an Dongsheng uranium deposit;
FIG. 9 is a power spectrum diagram of a field emission scanning electron microscope of uranium fossils in the target uranium-bearing pyrite of FIG. 8;
FIG. 10 is a field emission scanning electron microscope secondary electron image of rod-shaped uranium fossil obtained from uranium-bearing pyrite of sandstone target of ZKA147-39 in the Dongsheng uranium deposit part;
FIG. 11 is a power spectrum diagram of a field emission scanning electron microscope of uranium fossils in the target uranium-bearing pyrite of FIG. 10;
FIG. 12A is an edge image of the TEM lattice of a region of FIG. 10;
fig. 12B is a transmission electron microscope lattice edge image of another region of fig. 10.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The inventors of the present invention have made it possible to efficiently observe microfossils in uranium-containing sandstone, and thus have focused attention on uranium ores (uranium stones USiO)4·nH2UO or uraninite UO2) The symbiotic combination relationship with other minerals is researched, and the surprising discovery that uranium ores often have close symbiotic relationship with pyrite.
FIG. 1 is a field emission scanning electron microscope backscattering image of a part of ZKA151-39 gray sandstone in an Dongsheng uranium mine. Through detection, the content of uranium element in the ZKA151-39 east-win uranium ore gray sandstone is 67 ppm. In fig. 1, U represents uranium and Py represents pyrite. As can be seen from fig. 1, the uranium element and pyrite are in close symbiotic relationship.
FIG. 2 is a field emission scanning electron microscope backscatter image of a part of ZKA151-39 gray sandstone in the uranium eastern win ore. Through detection, the content of uranium in the ZKA151-39 east-wining uranium ore gray sandstone is 29 ppm. In fig. 2, U represents uranium and Py represents pyrite. As can be seen from fig. 2, the uranium element and pyrite are in close symbiotic relationship.
Fig. 3 is a field emission scanning electron microscope backscatter image of a portion of the ore-rich sandstone from a uranium store, sample number 410102. The uranium content in the ore-rich sandstone is 3140ppm through detection. In fig. 1, Qtz indicates quartz, Kfs indicates potassium feldspar, Py indicates pyrite, Cof indicates uranite, and Ab indicates albite. As can be seen from fig. 3, there is a close symbiotic relationship between uranium and pyrite.
As can be seen from fig. 1 to fig. 3, regardless of the content of uranium in the uranium ore, there is a close symbiotic relationship between uranium and pyrite, and the content of pyrite in sandstone can often reach 3% to 5% by mass, so that observation and collection of microfossils in the uranium ore can be completed by using pyrite as a medium in order to better observe the microfossils. Based on the above, the invention provides a method for determining mineralized microfossicles, which comprises the following steps:
s101: crushing the uranium-containing sandstone to obtain crushed uranium-containing sandstone;
s102: collecting pyrite particles in the crushed uranium-containing sandstone;
s103: collecting uranium-containing pyrite particles in the pyrite particles;
s104: and determining the mineralized microfossicles according to the mineral structure with the bacterial morphology on the surface of the uranium-containing pyrite particle.
First, the uranium-containing sandstone is subjected to a pulverization treatment, and specifically, it may be pulverized to 60 to 80 mesh, for example, 60 mesh to obtain a pulverized uranium-containing sandstone.
Subsequently, the pyrite granules in the crushed uranium-bearing sandstone are collected. The invention is not limited to a specific method for collecting pyrite particles in the crushing of uranium-bearing sandstone. In one embodiment, collecting pyrite particles in the crushed uranium-bearing sandstone may include:
washing the crushed uranium-containing sandstone with water to obtain heavy minerals;
and detecting and separating the heavy minerals by using a binocular microscope to obtain the pyrite particles.
Specifically, the washing treatment is to wash the crushed uranium-bearing sandstone with water at normal temperature, so that the crushed uranium-bearing sandstone can be sorted according to the specific gravity of minerals, screen out light minerals floating on the water surface after each washing, further wash the remaining minerals with water for more than ten times until the minerals with different specific gravities can be effectively separated, and thus obtain heavy minerals sinking to the bottom.
Among the heavy minerals, other types of minerals are included in addition to pyrite. Further, when the intermediate mineral is observed by using a binocular microscope, since the pyrite has a special mineralogy characteristic, specifically, the pyrite is golden yellow, the color characteristic can be noticed in the process of observation, and once the special color is confirmed, the pyrite can be identified and selected from other minerals.
Although the uranium and the pyrite have a close symbiotic relationship, it can be understood that because the content of the pyrite in the uranium-containing sandstone is greater than that of the uranium in the uranium-containing sandstone, the pyrite particles need to be screened to select the pyrite particles with uranium on the surface, namely the uranium-containing pyrite particles.
The invention is not limited to the manner of collecting the uranium-bearing pyrite particles in the pyrite particles. In order to be able to collect the uranium-bearing pyrite particles in the pyrite particles quickly and accurately, the collection of the uranium-bearing pyrite particles may be accomplished in the following manner.
Carrying out gold spraying treatment on the surfaces of the pyrite particles to obtain gold-sprayed pyrite;
and detecting the gold spraying-pyrite particles by using an energy spectrum scanning electron microscope to obtain the uranium-containing pyrite particles.
In order to find the uranium-containing pyrite particles conveniently, gold coating can be formed on the surfaces of the pyrite particles through gold spraying treatment, so that the pyrite particles have conductivity, and efficient detection and collection of the uranium-containing pyrite particles can be realized by using an energy spectrum scanning electron microscope.
Firstly, carrying out gold spraying treatment on the surface of pyrite particles, and specifically carrying out the following operations: and spraying a gold covering layer on the surface of the pyrite particles. Wherein, if the thickness of the gold covering layer is too thick, the appearance observation is influenced; if the thickness of the gold coating is too thin, the conductivity of the pyrite particles cannot be effectively achieved. Thus, the thickness of the gold coating on the surface of the pyrite particle can be controlled to be 8-11nm, for example 10 nm.
And then, detecting the gold spraying-pyrite particles by using an energy spectrum scanning electron microscope and determining uranium-containing pyrite particles in the gold spraying-pyrite particles according to the result of energy spectrum scanning.
The microfossil referred to in the present invention refers to microorganisms such as sulfate-reducing bacteria, sulfur bacteria, etc., and thus has a specific biological morphology, specifically, a bacterial morphology. The bacterial morphology referred to in the present invention may also be referred to as bacterial morphology, including at least one of rod-like, sphere-like, dumbbell-like, and the like.
Therefore, when a mineral structure having a bacterial morphology is found in the gold-sprayed-pyrite particle, the mineralization microfossicle can be determined from the mineral structure having a bacterial morphology.
The method takes pyrite as a medium, effectively finds out the uranium ore in the uranium-containing sandstone by screening the pyrite in the uranium-containing sandstone, and further determines the mineral microfossicle by observing the mineral structure with the bacterial morphology in the uranium ore by taking the morphology of the mineral structure as a clue. Therefore, the method for determining the mineralized micro fossil can efficiently and accurately find the mineralized micro fossil in the uranium ore sandstone in the uranium ore or the uranium ore, on one hand, the method is favorable for truly reflecting the diagenetic environment of the uranium ore, on the other hand, the method can also provide more powerful evidence for the sandstone-type uranium ore for participating in the formation of the uranium ore by microorganisms, realize the efficient analysis and summary of the diagenetic mechanism and the basic distribution rule of the sandstone-type uranium ore, and further provide important clues for finding the sandstone-type uranium ore and indicate the ore finding direction.
In order to achieve further detection of mineralized microfractures, in a specific embodiment, the determining the mineralized microfractures according to the mineral structure with bacterial morphology on the surface of the uranium-bearing pyrite particle includes:
carrying out first morphology detection on the rock surface of the uranium-containing pyrite particles to obtain target uranium-containing pyrite;
carrying out second appearance detection on the target pyrite to obtain the mineralized microflite;
wherein the surface of the target uranium-containing pyrite has a mineral structure with a bacterial morphology.
Specifically, a scanning electron microscope is utilized to perform first morphology detection on the surface of the uranium-containing pyrite particles, and once a mineral structure with a bacterial morphology is found, the uranium-containing pyrite with the mineral structure with the bacterial morphology is collected, and the uranium-containing pyrite with the mineral structure with the bacterial morphology is the target uranium-containing pyrite. Subsequently, the target uranium-bearing pyrite needs to be separated from the uranium-bearing pyrite particles, the separation operation needs the assistance of a microscope, and in order to ensure the accuracy of the separation, the separation needs to be completed manually by professionals as much as possible. And then, carrying out second appearance detection on the separated target uranium-containing pyrite by using a scanning electron microscope to obtain the mineralized microfracts. It is understood that the mineralized microfossites herein include uranium ores and pyrites, in addition to mineralized microfossites.
It should be noted that in order to further improve the accuracy of collection of mineralized microfracts, the second morphological examination is often performed with greater attention to those mineral structures with bacterial morphology that appear in colonies. The reason is that the microorganisms are characterized by colonization, and therefore, in the target uranium-containing pyrite, there appear individual uranium-containing pyrite particles having a mineral structure with a bacterial morphology and a population of uranium-containing pyrite particles having a mineral structure with a bacterial morphology, and therefore the second morphology is used to detect the uranium-containing pyrite particles having a mineral structure with a bacterial morphology for observing the population, i.e., the target uranium-containing pyrite is obtained. In addition, the uranium-containing pyrite particles with the mineral structure in the bacterial morphology which appear in the group can also find the mineral structure in other bacterial morphology.
Fig. 4 is a secondary electron diagram of a field emission scanning electron microscope for uranium fossils in the target uranium-bearing pyrite obtained from the uranium-bearing sandstone in fig. 3, fig. 5 is an energy spectrum diagram of a field emission scanning electron microscope for uranium fossils in the target uranium-bearing pyrite in fig. 4, fig. 6 is an energy spectrum diagram of a field emission scanning electron microscope for uranium fossils in the target uranium-bearing pyrite obtained from a partially-enriched sandstone of a uranium store with a sample number of 410102, and fig. 7 is an energy spectrum diagram of a field emission scanning electron microscope for uranium fossils in the target uranium-bearing pyrite in fig. 6. In fig. 4 and 6, Cof is shown as uranite. As can be seen from fig. 5 and 7, the uranium ore is obtained from the uranium-containing pyrite in fig. 4, and similarly, the uranium ore is obtained from the uranium-containing pyrite in fig. 6. As can be seen from fig. 4 and 6, the mineral structure with bacterial morphology, namely uranium mineralized microfossicle, can be found in the uranium-containing pyrite.
Fig. 8 is a secondary electron diagram of a field emission scanning electron microscope for rodlike uranium stones obtained from the uranous pyrite of the ZKA147-39 sandstone target in the uranous deposit, fig. 9 is an energy spectrum diagram of a field emission scanning electron microscope for uranium stones in the uranous pyrite of the target in fig. 8, fig. 10 is a secondary electron diagram of a field emission scanning electron microscope for rodlike uranium stones obtained from the uranous pyrite of the ZKA147-39 sandstone target in the uranous deposit, and fig. 11 is an energy spectrum diagram of a field emission scanning electron microscope for uranium stones in the uranous pyrite of the target in fig. 10. According to fig. 8, the target uranium-containing pyrite contains rod-shaped microbial fossils, and according to fig. 9, the microbial fossils are mineralized by uranium; fig. 10 shows that the target uranium-containing pyrite contains rod-shaped and spherical fossils, and fig. 11 shows that the microbial fossils have been mineralized with uranium.
In addition, in order to quickly observe and determine the mineralized micro fossil, the uranium-containing sandstone with the uranium content of more than 1000ppm is selected as a raw material of the determination method for the mineralized micro fossil.
In order to further verify the objectivity and the accuracy of the method, the method also verifies the mineralized microfossicle obtained by the method. Specifically, the target uranium-containing pyrite is subjected to flaking treatment, and then mineralized microfracts are observed under a high-resolution transmission electron microscope, and the following parameters are detected. The detection parameters include: lattice distance of the crystal, size of the crystal, whether the crystal structure is a nanocrystal, elemental composition in the crystal, and the like. Wherein, the lattice distance and the crystal structure of the crystal are used for distinguishing the mineral composition of the crystal (namely uranite or uranite); whether the crystal size is composed of nanocrystals or not is used to determine whether the crystal size is a fossilized crystal. An H-9000NAR type 300 kV high-resolution transmission electron microscope instrument is used for performing energy spectrum test on the target uranium-containing pyrite obtained by the method, finding the structure of a microfossite mineral, and measuring the lattice distance and the crystal size of the microfossite.
FIG. 12A is a transmission electron microscope image of the edge of the crystal lattice of a region of FIG. 1012B is a transmission electron microscope lattice edge image of another region of FIG. 10. The bottom left corner of FIGS. 12A and 12B is the d-space lattice distance, 3.44-3.48nm in size, and the top left corner of FIG. 12B is the Fourier transform image. As shown in FIGS. 12A and 12B, it was found that the crystal size was mainly composed of crystals of 4nm to 80nm, mainly 5 to 25nm, i.e., constituted of nanocrystals, with a crystal spacing of
And
very close to the intergranular spacing of uranites (
And
) It is confirmed that the microfossite nanocrystals are tetragonal bipyramid structures of uranite, and thus the mineral component of the target microfossite can be determined to be a uranite crystal.
Further, transmission electron microscopy energy spectrum analysis is carried out, and the micro fossil structure is found to contain K, C, P and other vital elements besides Si and U elements. In combination with the other evidence, we believe that these vital elements should be retained by microorganisms, further proving to be fossilized. Therefore, the detection steps can verify that the method realizes the search and screening of the micro fossil in the uranium ore, and the method for searching the mineralized micro fossil has objectivity and accuracy.
The method for determining mineralized micro fossil is beneficial to reducing and analyzing whether microorganisms exist in the environment during the mineralization period, deducing the types of the microorganisms by combining geochemical analysis, and determining the action of the microorganisms in the mineralization process. The mineralization environment is very similar to the earth environment with early hypoxia and profuse prokaryotes, provides a similar object for scientists to research the conditions and evolution of the early earth surface environment, and promotes the development of the environmental evolution research in the geological history period.
It should be noted that, at present, only the type of the microorganism can be preliminarily identified according to the morphology of microsomes fossil, and the type of the microorganism possibly appearing in the mineralization process is discussed according to the result of geochemistry test, and the judgment of the exact species of the microorganism still needs further assistance of other information and means.
The invention also provides application of the method for determining mineralized micro fossil, and particularly relates to application of the method in researching an ore-forming mechanism, which is beneficial to realizing efficient analysis and summary of the ore-forming mechanism and basic rules of the sandstone-type uranium ore in the aspect of structure, and further can provide important ore finding clues and ore finding directions for the sandstone-type uranium ore.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for determining mineralized microfossils, comprising the steps of:
crushing the uranium-containing sandstone to obtain crushed uranium-containing sandstone;
collecting pyrite particles in the crushed uranium-containing sandstone;
collecting uranium-containing pyrite particles in the pyrite particles;
and determining the mineralized microfossicles according to the mineral structure with the bacterial morphology on the surface of the uranium-containing pyrite particle.
2. The method for determining mineralized fossilized according to claim 1, wherein the bacterial morphology comprises at least one of rod-like, spherical, and dumbbell-like shapes.
3. The method for determining mineralized microfossicles according to claim 2, wherein the determining mineralized microfossicles from the mineral structure with bacterial morphology on the surface of the uranium-containing pyrite particles comprises:
carrying out first morphology detection on the rock surface of the uranium-containing pyrite particles to obtain target uranium-containing pyrite;
performing second appearance detection on the target uranium-containing pyrite to obtain the mineralized microfracture;
wherein the surface of the target uranium-containing pyrite has a mineral structure with a bacterial morphology.
4. The method for determining mineralized fossilized according to claim 1, wherein the pulverization treatment comprises pulverizing the uranium-bearing sandstone to a particle size of 60-80 mesh.
5. The method for determining mineralized microfossils according to claim 3 or 4, wherein the collecting pyrite particles in the crushed uranium containing sandstone comprises:
washing the crushed uranium-containing sandstone with water to obtain heavy minerals;
and detecting and separating the heavy minerals by using a binocular microscope to obtain the pyrite particles.
6. The method for determining mineralization of microfracts as claimed in claim 5, wherein said collecting uranium-bearing pyrite particles of said pyrite particles comprises:
carrying out gold spraying treatment on the surfaces of the pyrite particles to obtain gold-sprayed pyrite;
and detecting the gold spraying-pyrite particles by using an energy spectrum scanning electron microscope to obtain the uranium-containing pyrite particles.
7. The method for determining mineralized micro fossil according to claim 1, wherein the content of uranium dioxide in the uranium-containing sandstone is greater than 1000 ppm.
8. The method for determining mineralized microfracts according to claim 6, wherein the thickness of the gold coating in the gold-sprayed pyrite is 9-11 nm.
9. The method for determining mineralized fossilized according to claim 3, wherein the first and second morphological examinations are performed by scanning electron microscopy.
10. Use of a method for determining mineralization of microfossils according to any one of claims 1 to 9 for the study of mineralization mechanisms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110382378.2A CN113092725B (en) | 2021-04-09 | 2021-04-09 | Method for determining mineralized microfossicles and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110382378.2A CN113092725B (en) | 2021-04-09 | 2021-04-09 | Method for determining mineralized microfossicles and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113092725A true CN113092725A (en) | 2021-07-09 |
| CN113092725B CN113092725B (en) | 2021-12-07 |
Family
ID=76675848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110382378.2A Active CN113092725B (en) | 2021-04-09 | 2021-04-09 | Method for determining mineralized microfossicles and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113092725B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112905A (en) * | 2021-08-30 | 2022-03-01 | 核工业北京地质研究院 | Method for judging whether biological effect participates in diagenetic ore of black rock series |
| CN115079296A (en) * | 2022-07-22 | 2022-09-20 | 核工业北京地质研究院 | Method for tracing and exuding trace elements of pyrite in sandstone uranium ore to form ore fluid |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110622042A (en) * | 2017-05-10 | 2019-12-27 | 日本电气株式会社 | Analysis device, stratum generation device, analysis method, stratum generation method, and program |
| CN112379075A (en) * | 2020-10-21 | 2021-02-19 | 核工业北京地质研究院 | Geological method for determining internal relation between pyrite and uranium minerals in sandstone-type uranium ores |
-
2021
- 2021-04-09 CN CN202110382378.2A patent/CN113092725B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110622042A (en) * | 2017-05-10 | 2019-12-27 | 日本电气株式会社 | Analysis device, stratum generation device, analysis method, stratum generation method, and program |
| EP3637154A1 (en) * | 2017-05-10 | 2020-04-15 | Nec Corporation | Analysis device, stratum dating device, analysis method, stratum dating method, and program |
| CN112379075A (en) * | 2020-10-21 | 2021-02-19 | 核工业北京地质研究院 | Geological method for determining internal relation between pyrite and uranium minerals in sandstone-type uranium ores |
Non-Patent Citations (3)
| Title |
|---|
| 代志杰: "金顶超大型铅锌矿床硫化物菌生结构和细菌化石及成矿学意义", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
| 杜远生等: "《古生物地史学概论》", 28 February 2009 * |
| 陈荣林等: "《石油地质实验测试技术新进展》", 31 December 1994 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114112905A (en) * | 2021-08-30 | 2022-03-01 | 核工业北京地质研究院 | Method for judging whether biological effect participates in diagenetic ore of black rock series |
| CN115079296A (en) * | 2022-07-22 | 2022-09-20 | 核工业北京地质研究院 | Method for tracing and exuding trace elements of pyrite in sandstone uranium ore to form ore fluid |
| CN115079296B (en) * | 2022-07-22 | 2022-11-01 | 核工业北京地质研究院 | Method for tracing and exuding trace elements of pyrite in sandstone uranium ore to form ore fluid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113092725B (en) | 2021-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Jin et al. | Geochemistry of Daihai Lake sediments, Inner Mongolia, north China: implications for provenance, sedimentary sorting, and catchment weathering | |
| Schieber | Sedimentary pyrite: A window into the microbial past | |
| Van Ginneken et al. | The weathering of micrometeorites from the Transantarctic Mountains | |
| Peng et al. | Release of heavy metals during weathering of the Lower Cambrian black shales in western Hunan, China | |
| LeCompte et al. | Independent evaluation of conflicting microspherule results from different investigations of the Younger Dryas impact hypothesis | |
| CN113092725B (en) | Method for determining mineralized microfossicles and application | |
| Cook et al. | Advances and opportunities in ore mineralogy | |
| West et al. | 2014 Atomic Spectrometry Update–a review of advances in X-ray fluorescence spectrometry | |
| Wacey et al. | Advanced analytical techniques for studying the morphology and chemistry of Proterozoic microfossils | |
| Hower et al. | Mineralogy of a rare earth element-rich Manchester coal lithotype, Clay County, Kentucky | |
| Darling et al. | Eoarchean to Neoarchean evolution of the Nuvvuagittuq Supracrustal belt: New insights from U-Pb zircon geochronology | |
| Bevandić et al. | Geochemical and mineralogical characterisation of historic Zn–Pb mine waste, Plombières, East Belgium | |
| Levett et al. | Microbial weathering signatures in lateritic ferruginous duricrusts | |
| White et al. | The provenance of Borneo's enigmatic alluvial diamonds: A case study from Cempaka, SE Kalimantan | |
| Hickman-Lewis et al. | X-ray microtomography as a tool for investigating the petrological context of Precambrian cellular remains | |
| Wierzchos et al. | Microbial fossil record of rocks from the Ross Desert, Antarctica: implications in the search for past life on Mars | |
| Becker-Kerber et al. | Clay templates in Ediacaran vendotaeniaceans: Implications for the taphonomy of carbonaceous fossils | |
| Feng et al. | Absolute accumulation and isotope fractionation of Si and Fe during dolomite weathering and terra rossa formation | |
| du Châtelet et al. | Three-dimensional morphological and mineralogical characterization of testate amebae | |
| Pérez-Huerta et al. | Biogenic calcite granules—Are brachiopods different? | |
| du Châtelet et al. | Influence of sediment grain size and mineralogy on testate amoebae test construction | |
| McNear Jr et al. | Shining light on metals in the environment | |
| Xia et al. | Assessment of Gold-Bearing Quartz Vein as a Potential High-Purity Quartz Resource: Evidence from Mineralogy, Geochemistry, and Technological Purification | |
| Craw et al. | Mineralogy and provenance of auriferous Waimumu Quartz Gravels, Southland, New Zealand | |
| Macêdo Filho | Geochemical characterization of the Equatorial Atlantic Magmatic Province and its correlation with other magmatic events related to the South Atlantic Opening |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |