Method for rapidly manufacturing rock slices in field

Abstract

The invention relates to a method for rapidly manufacturing rock slices in the field. The problem that rock minerals are difficult to identify due to the fact that rock slices cannot be manufactured in the field is solved. The method is characterized by comprising the following steps: step 1, preparing, and selecting a field sample; step 2, gluing the surface of the selected field sample; 3, grinding the selected sample for the first time; step 4, carrying out epoxy resin AB adhesive sheet bonding on the ground sample and a glass slide; step 5, carrying out secondary grinding on the bonded sample; and finally grinding the prepared sample sheet until the thickness of the sheet reaches the standard requirement. The method for rapidly manufacturing the rock slice in the field is simple, convenient and rapid, the manufactured rock slice has enough representativeness, rock and mineral types can be conveniently identified and analyzed in the field, and the research requirements in the aspects of minerals, structures, rock formation causes and the like can be comprehensively met.

Description

Technical field:

[0001] The present invention relates to the technical field of unconventional oil and gas exploration, and in particular to a method for rapidly producing rock slices in the field. Background technology:

[0002] Field thin sectioning is primarily used to understand the macroscopic composition of unknown rocks. It is a powerful tool for analyzing the origin and evolution of Earth rocks using field samples. For difficult-to-identify mineral compositions, thin sections are necessary. Sample identification and mineralogy analysis can then determine the rock type. However, field thin sectioning is a challenging task in petroleum geology. First, field conditions lack the precision cutting and grinding equipment of a laboratory, and second, the supportive environment of a laboratory is often lacking. Therefore, the field thin sectioning technology is currently undeveloped. Summary of the invention:

[0003] The purpose of the present invention is to overcome the problem in the background technology that rock thin sections cannot be made in the field, making it difficult to identify and identify rock minerals, and to provide a preparation method for quickly making rock thin sections in the field. This method is simple and quick to make, and the rock thin sections produced are sufficiently representative, which is convenient for field identification and analysis of rock and mineral types, and can fully meet the research needs in minerals, structure and rock genesis.

[0004] In order to achieve the above object, the present invention provides a method for rapidly producing rock slices in the field, comprising the following steps:

[0005] Step 1: Prepare and select field samples;

[0006] Step 2, gluing the surface of the selected field sample;

[0007] Step 3, grinding the selected sample for the first time;

[0008] Step 4: Glue the ground sample to the glass slide with epoxy resin AB;

[0009] Step 5: Grind the bonded sample a second time until the thickness of the sample slice after final grinding reaches the standard requirement.

[0010] Furthermore, the preparations for step 1 include:

[0011] Before making the sample, mark the position in detail, indicate the production direction, quantity, position and construction surface; make it according to the requirements.

[0012] Furthermore, the method for gluing the surface of the selected field sample in step 2 is:

[0013] The dried sample is sequentially infiltrated with glue on the A and B surfaces. The ground surface of the sample is the A surface; the other side opposite the ground surface is the B surface. The glue on the B surface is thicker than that on the A surface, mainly to prevent the sample from breaking and distinguishing the A and B surfaces. Secondly, the curing glue is infiltrated into the other specimen surfaces of the sample. The curing process prevents the evaporation of water during field sample preparation, which causes the specimen to expand and deform.

[0014] The curing glue is ethyl cyanoacrylate glue;

[0015] Glue penetration treatment method: drop ethyl a-cyanoacrylate glue onto the surface of the sample and spread it evenly with a wooden stick or tweezers; the outdoor temperature is between 25℃ and 35℃, the humidity is controlled at 20% to 60%, and the curing time is 30 to 60 minutes, until the sample is completely glued.

[0016] Furthermore, the method for performing the first grinding of the field sample in step 3 is:

[0017] The glued sample is ground for the first time, using a 200-400 mesh grinding stone mixed with an appropriate amount of water to grind the sample surface; after the first grinding, the second grinding is carried out;

[0018] First-stage grinding: Use 200-mesh grinding stone to grind the sample surface;

[0019] Secondary grinding: Surface grinding of the sample was performed using a 400-mesh grinding stone;

[0020] During one grinding, the grinding surface of the grinding stone must be flat. Water must be used as a coolant and grinding fluid for each graded grinding. During the grinding process, the grinding surface must be repeatedly observed to see if it is flat. After grinding, the residual grinding slurry must be cleaned off and wiped dry with paper or gauze.

[0021] Furthermore, the method of performing epoxy resin AB bonding on the ground sample and the glass slide in step 4 is as follows:

[0022] Prepare epoxy resin AB glue; the glue ratio is A:B = 5:5, and stir it in a container for 2 minutes until it becomes transparent and no longer bubbles;

[0023] For field samples, apply a small amount of epoxy resin AB glue evenly on the adhesive surface upwards, and for glass slides, apply the adhesive surface downwards to bond the two surfaces together. Extense and remove excess glue in the glue to ensure a good bond between the sample and the glass slide, and wait for 2 hours. During the bonding process, ensure that the glue on the adhesive surface of the sample is evenly applied. Apply an appropriate amount of glue and avoid bubbles when applying the glue.

[0024] Furthermore, the method of performing secondary grinding on the sample after bonding in step 5 includes the following steps: coarse grinding, fine grinding and fine grinding:

[0025] 1) Coarse grinding: use 400 mesh grinding stone for coarse grinding;

[0026] 2) Fine grinding: Use 600-800 mesh grinding stone for fine grinding. When grinding thinly, add water and corundum to mix and grind. After the first grinding, carry out the second grinding.

[0027] 3) Fine grinding: the thickness of the sample slice after final grinding reaches the standard requirement of 0.03mm.

[0028] Furthermore, coarse grinding relies on the friction between the grinding stone and the diamond to smooth the surface of the rock slice. After smoothing, if holes or loose particles are still found on the rock surface, cementation will be carried out again; the coarse grinding thickness is ground to 80 to 90 microns.

[0029] Furthermore, in the fine grinding process, the first-level grinding is to grind the surface of the sample by mixing 600-mesh grinding stone and 400-mesh corundum with water; the second-level grinding is to grind the surface of the sample by mixing 800-mesh grinding stone and 400-mesh corundum with water;

[0030] During the grinding process, avoid large scratches on the slices that may damage the slices. The slices are ground to 50 to 80 microns. At this time, the interference colors of quartz observed under a microscope are mostly first-level light yellow, yellow, and orange-yellow, and they are translucent.

[0031] Furthermore, during the fine grinding process: after the sample is ground to 50 microns on the grinding stone, it is necessary to continuously observe the interference color of the rock under a microscope during the grinding process, and use a 1000-mesh grinding stone mixed with corundum to grind to a thickness of 40 microns, and then use 2000-mesh water sandpaper for final grinding. During the grinding process, it is necessary to continuously observe under a microscope whether the interference color of quartz and feldspar is first-level grayish white. When it reaches first-level grayish white, stop grinding, and finely grind the sample to a thickness of 30 microns.

[0032] Furthermore, the water sandpaper grinding process requires repeated grinding of the rock surface on the water sandpaper. The quality inspection of the field-made thin slice grinding is based on the thin slice having a clear structure and visible minerals under a single polarizing microscope; the thickness of the thin slice after final grinding is 0.03 mm.

[0033] Compared with the above background technology, the present invention has the following beneficial effects:

[0034] (1) In the field geological survey and exploration environment, the present invention makes it easy to compare and identify unknown rocks on site by making rock thin sections to analyze minerals, structure, etc.

[0035] (2) The mineral slices produced by the present invention are a type of rock slices produced quickly in the field, and the thickness of the slices is only 30 microns.

[0036] (3) The present invention ensures the consistency of field micro-mineral and macro-stratification identification with geology, and improves the credibility of thin section mineral identification results.

[0037] (4) The present invention can indirectly indicate the geological significance of sedimentary environment, different mineral types and macro-microstructure by combining rock thin sections made in the field with geological data, thereby improving the integrity of the identification results.

[0038] (5) The present invention completely preserves the original surface continuity and the integrity of the mineral during the grinding process; the production method has the advantages of protecting the original information of the sample, requiring a small amount of sample and a short production cycle, etc., and can directly identify minerals in the field. In experimental analysis, mineral changes and sedimentary cycles can be analyzed, which can provide a strong basis for the accuracy of subsequent geological surveys, prospecting, macro-micro observations and other experimental analyses.

[0039] (6) The method of the present invention is used to produce thin slices in the field. The technical method does not use large-scale cutting equipment, automatic grinding equipment, or semi-automatic equipment to produce thin slices. The main grinding process uses materials such as grinding stone, ethyl cyanoacrylate mixed glue, epoxy resin glue, and corundum to solve the problem of difficult rock identification in field geological exploration.

[0040] The present invention adopts a fast solidifying colloid to make rock specimens. During the operation, the rock preparation, glue infiltration, cementation molding and thin slice grinding process are carried out. A rock slice (with a thickness of up to 0.03 mm) can be produced in the field within 4 hours. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 The field sample of Example 1 of the present invention is perlite.

[0042] Figure 2 The field sample of Example 1 of the present invention is a perlite thin section;

[0043] Figure 3 The field sample of Example 1 of the present invention is shown under a polarizing microscope. Specific implementation method:

[0044] The present invention will be further described below with reference to specific embodiments, but the protection scope of the present invention is not limited thereto.

[0045] Unless otherwise specified, the experimental methods used in the following examples are conventional methods.

[0046] Unless otherwise specified, the materials and reagents used in the following examples can be obtained from commercial sources.

[0047] The present invention provides a method for rapidly producing rock slices in the field, comprising the following steps:

[0048] Step 1: Select field samples;

[0049] In step 1, the collection of selected specimens and samples must first clarify the project requirements and tasks. The specimens and samples collected must be representative, accurately located, and of appropriate quantity. The specimens and samples collected should be as fresh as possible and must be cataloged, described, and organized promptly.

[0050] (1) The specifications of the collected specimens should be based on the principle of reflecting the actual thin section and hand specimen observation needs. For physical specimens on the measured cross-section representing the regional rock and stratigraphic units, the specimens are generally required to be no larger than 2 cm and no smaller than 0.5 cm. For mineral crystals, fossils, and rock samples of special geological structures, the specifications can be customized according to the specific situation.

[0051] (2) Oriented specimens: Select a certain plane on the outcrop, mark the occurrence element symbol (such as angle 16°) with a marker, and then knock down the specimen with a hammer. To ensure that there is an orientation line on the specimen, you can draw several parallel strike lines on the orientation plane to facilitate knocking down the specimen.

[0052] (3) Rock samples for full analysis: Fresh, unweathered, and uncontaminated rock outcrops should be selected for collection. Samples should be collected from sedimentary strata, vertical strata, and strata with large inclinations (samples should be no less than 0.5 cm), or samples should be taken along certain stratigraphic boundaries and then combined into a single sample. The sample weight should generally be no less than 100 g. Rock specimens and thin sections should be collected simultaneously with full analysis samples.

[0053] (4) Sample processing: Use a hacksaw or geological hammer to collect a rock sample (rock samples with a high degree of weathering can be cemented first and then collected). Samples with good cementation can be directly ground on a grinding stone with 200 mesh corundum to create a bottom plane and then glued and consolidated.

[0054] Step 2, gluing the surface of the selected field sample;

[0055] For loose rock blocks with uniform interior, you can break off a piece by hand along the cracks (joints or weathering cracks) of the specimen or gently tap a piece of rock suitable for the size of the slice with a hammer to cement it, so that the glue penetrates into the pores of the specimen; for rock specimens with irregular and uniform arrangement of bedding, blockiness, foliation or sliding surfaces, use a-ethyl cyanoacrylate mixed glue to penetrate. Using a-ethyl cyanoacrylate mixed cementing sample is a very important step in making this type of slice. The quality of the cementation is related to the success or failure of the rock slice. If handled well, even extremely weathered and loose samples can be made into complete rock slices. The processing method and precautions for using a-ethyl cyanoacrylate mixed glue are as follows:

[0056] The dried sample is sequentially infiltrated with glue on the A and B surfaces. The ground surface of the sample is the A surface; the other side opposite the ground surface is the B surface. The glue on the B surface is thicker than that on the A surface, mainly to prevent the sample from breaking and distinguishing the A and B surfaces. Secondly, the curing glue is infiltrated into the other specimen surfaces of the sample. The curing process prevents the evaporation of water during field sample preparation, which causes the specimen to expand and deform.

[0057] The curing glue is ethyl cyanoacrylate glue;

[0058] Glue penetration treatment method: drop ethyl a-cyanoacrylate glue onto the surface of the sample and spread it evenly with a wooden stick or tweezers; the outdoor temperature is between 25℃ and 35℃, the humidity is controlled at 20% to 60%, and the curing time is 30 to 60 minutes, until the sample is completely glued.

[0059] Things to note are:

[0060] (1) Do not inject too much glue at one time (generally no more than 0.5g). If it is not enough, inject more glue and repeat the process 2 to 5 times.

[0061] (2) The slide should be preheated before applying the glue to remove moisture, enhance the colloid permeability and shorten the curing time;

[0062] (3) The entire colloid consolidation of rock samples should be carried out in a cool and ventilated place. The sample consolidation usually takes about 5 minutes, and no more than 10 minutes;

[0063] (4) During the cementing operation, it is important to cement both the A and B sides of the sheet, especially for weathered rock samples with many cracks. After cementing, use a knife to scrape off the glue layer on the ground surface of the sheet to facilitate surface processing.

[0064] Step 3, grinding the selected sample for the first time;

[0065] Grind the glued sample for the first time on a special grinding stone with a mesh size of 200-400 using a grinding stone mixed with an appropriate amount of water to grind the sample surface;

[0066] First-stage grinding: Use 200-mesh grinding stone to grind the sample surface;

[0067] Secondary grinding: Surface grinding of the sample was performed using a 400-mesh grinding stone;

[0068] For one grinding, the grinding surface of the grinding stone is required to be flat. For each graded grinding, water needs to be used as a coolant and grinding fluid. During the grinding process, it is necessary to repeatedly observe whether the grinding surface is flat. After grinding, the residual grinding mud should be cleaned off and wiped dry with paper or gauze.

[0069] Step 4: Glue the ground sample to the glass slide with epoxy resin AB;

[0070] Prepare epoxy resin AB glue with a ratio of A:B = 5:5, stir in a container for 2 minutes until it becomes transparent and does not bubble;

[0071] With the sticky side of the field sample facing upward, apply a small amount of epoxy resin AB glue evenly to each side. With the sticky side of the glass slide facing downward, glue the two sides together. Squeeze and remove excess glue to ensure a good bond between the sample and the glass slide. Wait for 2 hours.

[0072] During the bonding process, it is necessary to ensure that the glue on the bonding surface of the sample is evenly applied. An appropriate amount of glue is applied and bubbles should be avoided when applying the glue.

[0073] Step 5: Grind the bonded sample a second time; the thickness of the sample slice after final grinding is 0.03 mm.

[0074] Thin sections need to be observed under a polarizing microscope. First of all, they must be "thin" enough so that light can penetrate the rock specimen. The general standard thin section thickness is 30μm, equivalent to 0.03mm.

[0075] Secondary grinding specifically includes three steps: coarse grinding, fine grinding and fine grinding:

[0076] 1) Coarse grinding: Use a 400-mesh grinding stone for coarse grinding. Coarse grinding mainly relies on the friction between the grinding stone and the diamond grains to smooth the surface of the rock slice. After smoothing, if there are still holes or loose particles on the rock surface, it must be cemented again; the coarse grinding thickness is about 80-90 microns.

[0077] 2) Fine grinding: Use 600-800 mesh grinding stone for fine grinding. When grinding thinly, add water and diamond sand to mix and grind.

[0078] First-stage grinding: Use 600-mesh grinding stone and 400-mesh corundum mixed with water to grind the sample surface;

[0079] Secondary grinding: 800-mesh grinding stone and 400-mesh corundum were mixed with water to grind the surface of the sample;

[0080] During the grinding process, avoid large scratches on the slice that may damage the slice, and grind the slice to 50-80 microns; at this time, the interference colors of quartz under the microscope are mostly first-level light yellow, yellow, and orange-yellow, and it is translucent.

[0081] 3) Fine grinding: After the sample is ground to 50 microns on the grinding stone, the interference color of the rock needs to be observed under a microscope during the grinding process. Use a 1000-mesh grinding stone mixed with corundum to grind to a thickness of 40 microns, and then use 2000-mesh water sandpaper for final grinding. During the grinding process, it is necessary to constantly observe under a microscope whether the interference color of quartz and feldspar is a first-level grayish white. Water sandpaper grinding prevents the sample from falling due to friction. Fine grinding makes the sample ground to a thickness of 30 microns.

[0082] The water sandpaper grinding process requires repeated grinding of the rock surface on the water sandpaper. The quality inspection of the field-made thin slice grinding is based on the thin slice having a clear structure and visible minerals under a single polarizing microscope; the thickness of the thin slice after final grinding is 0.04-0.05 mm.

[0083] Things to note when making rock thin sections quickly in the field:

[0084] 1. The sample must be kept sealed, and several slices must be ground and taken in the field. Each rock slice must be completed on the same day.

[0085] 2. Avoid the rainy season when conducting field production to prevent deliquescence of the sample.

[0086] 3. Do not use too much glue when gluing or covering the film. If the glue layer exceeds 0.1mm thick, the curing strength will decrease.

[0087] 4 After the thin section is ground, it should be identified as soon as possible to prevent the mineral from changing and affecting the reliability of the identification results.

[0088] The production of field rock thin sections and the solution of the consolidation rock sample process are important links in the successful completion of the production work. The use of unconventional production methods is the main means to complete the field identification of minerals. The field rock thin sections produced by epoxy resin AB adhesive sheet samples and a variety of processes have solved the problem of being unable to identify minerals and rocks.

[0089] Example 1

[0090] Taking the field sample of the Wutai Village section in Changchun City, Jilin Province as an example, a method for making rock thin sections in the field of the present invention is further described, which includes the following steps:

[0091] Step 1: Figure 1 (The pen in the figure is a reference) as shown, select the sample.

[0092] Step 2: Apply a mixture of ethyl cyanoacrylate and a-cyanoacrylate to the sample surface. Use a wooden stick or tweezers to evenly apply the mixture until the sample surface is saturated. The outdoor temperature is 30°C, and the humidity is controlled at 20%. The curing time is 40 minutes, until the sample is completely cured.

[0093] Step 3: Grind the sample for the first time; Grind the glued sample on a special grinding stone for the first time. Use a 200-400 mesh grinding stone with a proper amount of water to grind the surface.

[0094] First-stage grinding: Use 200-mesh grinding stone to grind the sample surface;

[0095] Secondary grinding: Surface grinding of the sample was performed using a 400-mesh grinding stone;

[0096] The abrasive tool for primary grinding must be dedicated, and the grinding surface of the grinding stone must be flat. Water must be used as a coolant and grinding fluid for each graded grinding. During the grinding process, the grinding surface must be repeatedly observed to see if it is flat. After grinding, the residual grinding mud must be cleaned off and wiped dry with paper or gauze.

[0097] Step 4. Use the ground sample and the glass slide to make epoxy resin AB adhesive sheets; prepare epoxy resin AB glue, adjust the glue ratio to A:B = 5:5, stir in a container for 2 minutes, and make it transparent without bubbles; apply a small amount of epoxy resin AB glue evenly on the sticky surface of the field sample facing up, and stick the two surfaces of the glass slide facing down, squeeze and remove excess glue in the glue to ensure a good bond between the sample and the glass slide, and wait for 80 minutes for the glue to solidify; the bonding process requires ensuring that the glue on the bonding surface of the sample is evenly applied, and the amount of glue applied is appropriate, and bubbles should be avoided when applying the glue.

[0098] Step 5: Grind the bonded sample a second time; and finally grind the prepared sample slices. The thickness of the slices after final grinding is 0.03 mm.

[0099] 1) Coarse grinding: Use a 400-mesh grinding stone for coarse grinding. Coarse grinding relies on the friction between the grinding stone and the emery to smooth the surface of the rock. After smoothing, if holes or loose particles are still found on the rock surface, re-cementing is necessary. The coarse grinding thickness is about 80 microns.

[0100] 2) Fine grinding: Use 600-800 mesh grinding stone for fine grinding. When grinding thinly, add water and diamond sand to mix and grind.

[0101] First-stage grinding: Use 600-mesh grinding stone and 400-mesh corundum mixed with water to grind the sample surface;

[0102] Secondary grinding: 800-mesh grinding stone and 400-mesh corundum were mixed with water to grind the surface of the sample;

[0103] The thin slice is ground to 50-80 microns during the grinding process. At this time, the interference color of quartz under the microscope is mostly light yellow, yellow, or orange-yellow, and it is transparent.

[0104] 3) Fine grinding: After the sample is ground to 50 microns on the grinding stone, the interference color of the rock needs to be observed under a microscope during the grinding process. Use a 1000-mesh grinding stone mixed with corundum to grind to a thickness of 40 microns, and then use 2000-mesh water sandpaper for final grinding. During the grinding process, it is necessary to constantly observe under a microscope whether the interference color of quartz and feldspar is a first-level grayish white. Water sandpaper grinding prevents the sample from falling due to friction. Fine grinding makes the sample ground to a thickness of 30 microns.

[0105] Place the prepared conglomerate thin section directly under a polarizing microscope. See the attached sample picture for the thin section. Figure 2 (The pen in the picture is a reference object). Figure 3 It can be seen from the orthogonal polarization diagram that different minerals are clearly visible under the orthogonal polarization when observing the field sample slice prepared by the method of Example 1 of the present invention, and the interference color standard is first-level grayish white, indicating that the obtained slice can be used as a standard slice for field production.

[0106] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for parts thereof. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention. Although the above describes the specific implementation methods of the present invention, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that, based on the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present invention.

Claims

1. A method for rapidly producing rock slices in the field, characterized by: The following steps are involved: Step 1: Prepare and select field samples; Step 2, gluing the surface of the selected field sample; Step 3, grinding the selected sample for the first time; Step 4: Glue the ground sample to the glass slide with epoxy resin AB; Step 5: Grind the bonded sample a second time until the thickness of the sample slice after final grinding reaches the standard requirement.

2. The method for rapidly producing rock slices in the field according to claim 1, characterized in that: The preparations for step 1 include: Before making the sample, mark the position in detail, indicate the production direction, quantity, position and construction surface; make it according to the requirements.

3. The method for rapidly producing rock slices in the field according to claim 1, characterized in that: The method for gluing the surface of the selected field sample in step 2 is as follows: The dried sample is sequentially infiltrated with glue on both sides A and B. The ground side of the sample is called side A, and the other side opposite the ground side is called side B. The glue on side B is thicker than that on side A, primarily to prevent sample fragmentation and distinguish between sides A and B. Secondly, curing glue is infiltrated into the other sides of the sample. The curing process prevents moisture evaporation during field preparation, which can cause the sample to expand and deform. The curing glue is ethyl cyanoacrylate glue; Glue penetration treatment method: drop ethyl a-cyanoacrylate glue onto the surface of the sample and spread it evenly with a wooden stick or tweezers; the outdoor temperature is between 25℃ and 35℃, the humidity is controlled at 20%~60%, and the curing time is 30~60 minutes, until the sample is completely glued.

4. The method for rapidly producing rock slices in the field according to claim 1, characterized in that: The method for performing the first grinding of the field sample in step 3 is: Grind the glued sample for the first time, using a 200-400 mesh grinding stone mixed with an appropriate amount of water to grind the sample surface; The first stage of grinding is followed by the second stage of grinding; First-stage grinding: Use 200-mesh grinding stone to grind the sample surface; Secondary grinding: Surface grinding of the sample was performed using a 400-mesh grinding stone; During one grinding, the grinding surface of the grinding stone must be flat. Water must be used as a coolant and grinding fluid for each graded grinding. During the grinding process, the grinding surface must be repeatedly observed to see if it is flat. After grinding, the residual grinding slurry must be cleaned off and wiped dry with paper or gauze.

5. The method for rapidly producing rock slices in the field according to claim 1, characterized in that: The method for performing epoxy resin AB bonding on the ground sample and the glass slide in step 4 is as follows: Prepare epoxy resin AB glue; the glue ratio is A:B = 5:5, and stir it in a container for 2 minutes until it becomes transparent and no longer bubbles; For field samples, apply a small amount of epoxy resin AB glue evenly on the adhesive surface upwards, and for glass slides, apply the adhesive surface downwards to bond the two surfaces together. Extense and remove excess glue in the glue to ensure a good bond between the sample and the glass slide, and wait for 2 hours. During the bonding process, ensure that the glue on the adhesive surface of the sample is evenly applied. Apply an appropriate amount of glue and avoid bubbles when applying the glue.

6. The method for rapidly producing rock slices in the field according to claim 1, characterized in that: The method of performing secondary grinding on the sample after bonding in step 5 includes the following steps: coarse grinding, fine grinding and fine grinding: 1) Coarse grinding: use 400 mesh grinding stone for coarse grinding; 2) Fine grinding: Use 600-800 mesh grinding stone for fine grinding. When grinding thinly, add water and corundum to mix and grind. After the first grinding, proceed to the second grinding. 3) Fine grinding: the thickness of the sample slice after final grinding meets the standard requirement of 0.03mm.

7. A method for rapidly producing rock slices in the field according to claim 6, characterized in that: Rough grinding is to smooth the surface of the rock slice by the friction between the grinding stone and the diamond grains. After smoothing, if holes or loose particles are still found on the rock surface, it will be cemented again; the rough grinding thickness is ground to 80~90 microns.

8. The method for rapidly producing rock slices in the field according to claim 6, characterized in that: In the fine grinding process, the first-level grinding is to grind the surface of the sample by mixing 600-mesh grinding stone and 400-mesh corundum with water; the second-level grinding is to grind the surface of the sample by mixing 800-mesh grinding stone and 400-mesh corundum with water; During the grinding process, avoid large scratches on the slices that may damage the slices. The slices are ground to 50~80 microns. At this time, the interference colors of quartz observed under a microscope are mostly first-level light yellow, yellow, and orange-yellow, and they are translucent.

9. The method for rapidly producing rock slices in the field according to claim 6, characterized in that: During the fine grinding process: After the sample is ground to 50 microns on the grinding stone, it is necessary to continuously observe the interference color of the rock under a microscope during the grinding process. Use a 1000-mesh grinding stone mixed with corundum to grind to a thickness of 40 microns, and then use 2000-mesh water sandpaper for final grinding. During the grinding process, it is necessary to continuously observe under a microscope whether the interference color of quartz and feldspar is first-level grayish white. When it reaches first-level grayish white, stop grinding and finely grind the sample to a thickness of 30 microns.

10. The method for rapidly producing rock slices in the field according to claim 6, characterized in that: The water sandpaper grinding process requires repeated grinding of the rock surface on the water sandpaper. The quality inspection of the field-made thin slice grinding is based on the thin slice having a clear structure and visible minerals under a single polarizing microscope; the thickness of the thin slice after final grinding is 0.03 mm.

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