A method for preparing a fluid-inclusion microtherm ore slice

Abstract

The embodiment of the application provides a preparation method of a fluid inclusion microthermometric ore slice, comprising the following steps: providing a fluid inclusion slice which has been observed and circled under an optical microscope in detail for microthermometric target fluid inclusion position; putting the whole fluid inclusion slice into a glass culture dish, injecting a slice adhesive dissolving solution into the culture dish, and immersing the whole fluid inclusion slice in the slice adhesive dissolving solution to dissolve the slice adhesive and separate the fluid inclusion ore slice from the bonding surface of the glass slide; after the separation, placing the fluid inclusion ore slice with the adhesive surface upward on the surface of the glass slide and immersing it in the slice adhesive dissolving solution; after the slice adhesive on the surface of the fluid inclusion ore slice is completely dissolved, cutting the fluid inclusion ore slice according to the position of the target inclusion to be measured and thermometric, and preparing a rock and mineral fragment containing the target fluid inclusion which is suitable in size to be placed in a cold and hot stage quartz crucible.

Description

Technical Field

[0001] This application relates to the technical field of fluid inclusion experimental methods, specifically to a method for preparing a fluid inclusion microthermometer mineral plate. Background Technology

[0002] For a long time, Earth science research has mainly focused on the solid materials of the Earth's crust. However, with the continuous study of crustal fluid processes and the ongoing accumulation of relevant data, geologists have come to a deeper understanding that the participation of geological fluids in almost all geological processes determines the movement and exchange of matter and energy within the Earth's crust. Geological fluids largely control the processes of diagenesis, magmatism, metamorphism, tectonic-deformation processes, and mineralization within the Earth's crust, as well as the mechanisms and evolution of geological dynamics. Therefore, research on geological fluids has received increasing attention.

[0003] Fluid inclusions trapped within minerals—microscopic geological fluids trapped in mineral lattice defects during crystallization—are often referred to as "ancient fluid fossils" and are the most direct and effective geological samples for studying the properties of geological fluids. Currently, they are widely used in various branches of geoscience, including sedimentology, petrology, (solid) mineral deposit geology, petroleum geology, reservoir geology, structural geology, and (paleo)environmental geology. Homogenization temperature and freezing point temperature are the two most fundamental and important geochemical parameters of mineral fluid inclusions. They are mainly used to determine the geological environment temperature, salinity, and fluid composition at the time of original fluid capture, and are also key basic data required for calculating the geological environment pressure at the time of original fluid capture using relevant PVT simulation methods. Homogenization temperature and freezing point temperature are primarily obtained through microthermodynamic testing of mineral fluid inclusions using a hot-cold stage. However, before this, effectively preparing microthermometric specimens of fluid inclusions that can be placed in a quartz crucible on the hot-cold stage is crucial for the subsequent implementation of microthermometry experiments.

[0004] Currently, the main methods for preparing fluid inclusion microthermometer mineral plates include the following two:

[0005] (1) "Cut-then-soak" preparation method. First, a glass cutter is used to cut the area of ​​the fluid inclusion to be measured (the area of ​​the fluid inclusion on the slide with the fluid inclusion mineral adhered to it) into small sample blocks. Then, the small sample blocks containing the fluid inclusion area to be measured are immersed in a petri dish filled with acetone or anhydrous ethanol to gradually separate the fluid inclusion mineral from the slide until the adhesive on the surface of the mineral particles in the fluid inclusion mineral is completely dissolved. However, this "cut-then-soak" method for preparing fluid inclusion microthermometer slides has the following two drawbacks:

[0006] First, the cutting process is complex and time-consuming, and operational errors are easily made if the operator lacks experience. This is mainly manifested in the fact that the size of each small sample block containing the fluid inclusion region to be measured, obtained by cutting the fluid inclusion thin film, must be smaller than the inner diameter of the quartz crucible on the hot and cold stage (15 mm), and generally, the length of each side of the small sample block should not exceed 8 mm. Because the sample blocks are small, and a single fluid inclusion thin film usually contains multiple sample blocks containing the fluid inclusion to be measured, the operation of cutting the fluid inclusion thin film with a glass cutter is relatively complex. It requires using the glass cutter to sequentially cut all the designated target fluid inclusion regions from the back of the fluid inclusion thin film (i.e., the back of the glass slide), a time-consuming and labor-intensive process. Furthermore, if the operator is not skilled in cutting the glass slide with a glass cutter (e.g., insufficient force in holding the glass cutter, unstable grip, poor control of the cutting direction, etc.), it is easy to damage the areas containing the target fluid inclusions in the thin film.

[0007] Secondly, due to the small size of the sample blocks, during the soaking process in a container (such as a petri dish) filled with anhydrous ethanol or acetone to dissolve the adhesive, improper handling can easily cause the small fluid inclusion minerals to break after they detach from the glass slide. For example, accidentally touching the container soaking the sample blocks can cause the sol liquid (acetone or anhydrous ethanol) in the container to shake. Even slight shaking can cause the fluid inclusion minerals to fall from the surface of the glass slide to the bottom of the container. This makes it difficult to remove the fluid inclusion minerals from the container with tweezers and greatly increases the probability of the minerals breaking during the removal process.

[0008] (2) "Cut-only, no-soak" preparation method. In order to reduce the probability of fluid inclusion fragment breakage that may occur in the above-mentioned "cut-then-soak" preparation method to zero, this preparation method only performs the step of cutting the fluid inclusion thin slice. That is, only the area of ​​the fluid inclusion to be measured is cut along the surface of the fluid inclusion thin slice using a glass cutter, and it is cut into small sample blocks. The size of each small sample block should be such that it can be placed in the quartz crucible of the hot and cold stage and can be easily rotated to adjust its position. However, this preparation method does not perform the soaking and degumming process, and directly uses these small sample blocks with glass slides as the objects of microthermometry.

[0009] The advantage of this preparation method is that it can minimize the risk of fluid inclusion fragment breakage due to improper operation. However, this advantage comes at the cost of sacrificing the accuracy of the fluid inclusion microthermometric data. Because the glass slide has a certain thickness, heat conduction occurs, which causes a certain lag in the heating temperature of the fluid inclusions. This results in the measured homogenization temperature and freezing point temperature of the fluid inclusions potentially being about 3-5 degrees higher than the actual values. o In particular, the freezing point temperature obtained by microthermography using small sample blocks with glass slides may have significant errors, or even be erroneous, when converted into salinity (wt% NaCl) data for fluid inclusions. Therefore, for fluid inclusion studies requiring high precision, strictly speaking, this method of microthermography using small sample blocks with glass slides is an imprecise and non-standard experimental procedure. Summary of the Invention

[0010] This application provides a method for preparing fluid inclusion microthermometer mineral slides to address the problems of complexity, time consumption, and difficulty in operation in the existing "cut-then-soak" preparation method, which involves cutting the fluid inclusion sheet into fragments before soaking it in a sol. It also addresses the problem of large errors or even incorrect data obtained when directly using fluid inclusion mineral slide fragments bonded with a glass slide for fluid inclusion microthermometer testing in the "cut-only" preparation method.

[0011] To solve the aforementioned experimental technical problems, this application achieves the following:

[0012] This application provides a method for preparing a fluid inclusion microthermometer mineral plate, the method comprising:

[0013] Provide a thin slide of fluid inclusions that has been pre-observed under an optical microscope in detail using microlithography and has the location of the fluid inclusions to be microthermally measured delineated, i.e., a glass slide with a mineral slide of fluid inclusions bonded together.

[0014] The fluid inclusion sheet is placed entirely in a glass culture dish. Adhesive dissolving solution is injected into the culture dish, and the adhesive dissolving solution immerses the entire fluid inclusion sheet to dissolve the adhesive and separate the bonding surface between the fluid inclusion sheet and the glass slide.

[0015] After the fluid inclusion mineral slide separates from the glass slide, the fluid inclusion mineral slide continues to be immersed in the adhesive solution until the adhesive adhering to the surface of the mineral particles in the fluid inclusion mineral slide is completely dissolved.

[0016] Using a blade, the fluid inclusion mineral sheet that has been completely dissolved with the adhesive is cut according to the position of the target fluid inclusion to be measured on its surface, so as to prepare a rock and mineral fragment containing the target fluid inclusion that is sized to be placed in a quartz crucible on a hot and cold table, i.e., to prepare a fluid inclusion microthermometer mineral sheet.

[0017] The qualified microthermometric mineral sample is stored in a sample box for later use, and a label is affixed to the sample box. The label indicates the number of the target fluid inclusion sample to be measured, outlines the shape of the microthermometric mineral sample, and shows a schematic diagram of the area where the target fluid inclusion is located.

[0018] Optionally, the optical microscope includes a polarizing microscope and a fluorescence microscope, wherein the polarizing microscope is used to observe brine inclusions and hydrocarbon / non-hydrocarbon gaseous inclusions, and the fluorescence microscope is used to observe hydrocarbon inclusions containing unsaturated hydrocarbons.

[0019] Before placing the fluid inclusion sheet entirely in a glass petri dish, the preparation method further includes: based on micro-lithomorphological characteristics, using a 2B pencil to delineate suitable positions of the target fluid inclusions to be subsequently subjected to microthermometry on the surface of the fluid inclusion sheet. The circle delineating the positions should be as small as possible without contaminating the clarity of the imaging field of the target fluid inclusions under an optical microscope, so as to facilitate the subsequent cutting of the fluid inclusion mineral sheet.

[0020] Optionally, the fluid inclusion sheet is placed entirely in a petri dish, and a dissolving solution for adhesive is injected into the petri dish, immersing the entire fluid inclusion sheet in the dissolving solution to dissolve the adhesive, thereby separating the fluid inclusion sheet from the bonding surface of the glass slide, including:

[0021] The fluid inclusion sheet is placed in the culture dish for a first fixed time, and the adhesive dissolving solution immerses the entire fluid inclusion sheet.

[0022] Open the lid of the culture dish and use precision pointed stainless steel tweezers to push the fluid inclusion mineral slide from one side to check whether the fluid inclusion mineral slide is completely separated from the glass slide.

[0023] If the fluid inclusion mineral slide can move under the push of the precision pointed stainless steel tweezers, it indicates that the fluid inclusion mineral slide has been completely separated from the glass slide; if the fluid inclusion mineral slide cannot move under the push of the precision pointed stainless steel tweezers, it indicates that the fluid inclusion mineral slide has not been completely separated from the glass slide under the action of the adhesive.

[0024] If the fluid inclusion mineral slice is not completely separated from the glass slide, the process is repeated as follows: the lid of the culture dish containing the fluid inclusion slice is re-covered, and the dish is left for a first fixed period of time. The lid of the culture dish containing the fluid inclusion slice is then opened, and the fluid inclusion mineral slice is pushed from one side using the precision pointed stainless steel tweezers. The process is repeated to check whether the fluid inclusion is completely separated from the glass slide, until the fluid inclusion is completely separated from the glass slide.

[0025] Optionally, after the fluid inclusion mineral slide separates from the glass slide, the fluid inclusion mineral slide continues to be immersed in the adhesive solution until the adhesive adhering to the surface of the mineral particles in the fluid inclusion mineral slide is completely dissolved. This includes: after the fluid inclusion mineral slide separates from the glass slide, using precision pointed stainless steel tweezers to hold one end of the glass slide, removing the glass slide carrying the fluid inclusion mineral slide from the petri dish, and placing it on the work surface of the fume hood to allow the adhesive solution adhering to the surface of the fluid inclusion mineral slide to evaporate naturally.

[0026] When the fluid inclusion mineral slice is in a semi-dry state after evaporation, the fluid inclusion mineral slice is gently pushed several times from one side using the precision pointed stainless steel tweezers to prevent the fluid inclusion mineral slice and the glass slide from sticking together again due to the cumulative adsorption force generated by the evaporation of the residual adhesive solution.

[0027] When the remaining adhesive solution has completely evaporated and the fluid inclusion mineral slide is dry, use the precision pointed stainless steel tweezers to push a portion of the fluid inclusion mineral slide away from the surface of the glass slide. Use a single-edged blade to slowly insert it from the bottom of the area where the fluid inclusion mineral slide is detached from the surface of the glass slide and lift the fluid inclusion mineral slide.

[0028] Place the fluid inclusion mineral slice in the palm of your hand, and use the single-edged blade to turn the top and bottom surfaces of the fluid inclusion mineral slice so that the adhesive side previously bonded to the glass slide is facing upwards. Then, place the fluid inclusion mineral slice on the surface of the glass slide, and use the precision pointed stainless steel tweezers to hold one end of the glass slide and continue to place it in the petri dish for immersion. At the same time, depending on the specific situation, add the adhesive dissolving solution to the petri dish to ensure that the adhesive dissolving solution submerges the entire fluid inclusion slice until the adhesive on the surface of the mineral particles in the fluid inclusion mineral slice is completely dissolved.

[0029] Optionally, the fluid inclusion mineral slice is placed on the surface of the glass slide, and one end of the glass slide is held by the precision pointed stainless steel tweezers and placed in the petri dish for further immersion. Simultaneously, depending on the specific situation, the adhesive dissolving solution is added to the petri dish to ensure that the adhesive dissolving solution completely submerges the fluid inclusion slice until the adhesive adhering to the surface of the mineral particles in the fluid inclusion mineral slice is completely dissolved, including:

[0030] After soaking in the culture dish for a second fixed period of time, the fluid inclusion mineral slide is removed from the culture dish by holding one side of the glass slide with the precision pointed stainless steel tweezers and placed on the work surface of the fume hood, allowing the adhesive solution adhering to the surface of the fluid inclusion mineral slide to evaporate naturally.

[0031] When the fluid inclusion mineral slice is in a semi-dry state due to evaporation, the fluid inclusion mineral slice is gently pushed several times from one side using the precision pointed stainless steel tweezers to prevent the fluid inclusion mineral slice and the surface of the glass slide from sticking together again due to the cumulative adsorption force generated by the evaporation of the residual adhesive solution.

[0032] Once the residual adhesive solution has completely evaporated and the fluid inclusion mineral slide is dry, use the precision pointed stainless steel tweezers to push a portion of the fluid inclusion mineral slide away from the surface of the glass slide. Use a single-edged blade to slowly insert it from the bottom of the area where the fluid inclusion mineral slide is detached from the surface of the glass slide and lift it up. Then place it on a new glass slide to support it and ensure that the previous adhesive surface is in contact with the surface of the new glass slide.

[0033] The new slide containing the fluid inclusion mineral fragment is loaded onto the stage of the polarizing microscope. Under single polarized light conditions, a high-power objective lens is used to observe the degree of dissolution of the adhesive on the surface of the mineral particles in the fluid inclusion mineral fragment, in order to check whether the adhesive has been completely dissolved. The identification criteria under the polarizing microscope when the adhesive has been completely dissolved are: the mineral particles in the fluid inclusion mineral fragment are clean and bright under single polarized light, and the phase boundaries of the fluid inclusions captured in the mineral particles are clearly distinguishable.

[0034] If the adhesive on the surface of the mineral particles in the fluid inclusion mineral slide is completely dissolved, the subsequent slicing operation is performed; if the adhesive on the surface of the mineral particles in the fluid inclusion mineral slide is not completely dissolved, the following process is repeated: the fluid inclusion mineral slide with the adhesive side facing up is placed on the surface of the glass slide and immersed in the petri dish for a second fixed time to dissolve the adhesive; the fluid inclusion mineral slide is then removed and placed under the polarizing microscope for microscopic observation to check the degree of dissolution of the adhesive on the surface of the mineral particles in the fluid inclusion mineral slide, until the adhesive is completely dissolved.

[0035] Optionally, the adhesive solution includes either acetone or anhydrous ethanol.

[0036] Optionally, the step of cutting the fluid inclusion mineral sheet with completely dissolved adhesive according to the position of the target fluid inclusion on its surface using a blade includes: illuminating the surface of the fluid inclusion mineral sheet with a flashlight to clearly identify the position of the target fluid inclusion marked by the 2B pencil, and cutting the fluid inclusion mineral sheet with completely dissolved adhesive according to the position of the target fluid inclusion on its surface using the blade;

[0037] The blade is a plastic remover.

[0038] Optionally, the size of the microthermometer sheet is such that it can be placed in the hot-cold stage quartz crucible and its position can be easily adjusted inside the crucible. The standard inner diameter of the hot-cold stage quartz crucible is 15 mm, and the length of each side of the prepared microthermometer sheet is preferably controlled to be around 5 mm. The shape of the microthermometer sheet is preferably a near-square or a near-rectangular shape with a small length-to-width ratio.

[0039] Optionally, the sample box can be any size of a coin storage box with a diameter of 12 to 20 mm, and one micro thermometer mineral plate is placed in each sample box.

[0040] The step of affixing a label to the sample box, marking the sample number of the target fluid inclusion to be measured, outlining the morphology of the microthermometric mineral plate, and providing a schematic diagram of the area where the target fluid inclusion is located, includes:

[0041] A label is affixed to each of the sample boxes, and the corresponding label is marked with the number of the target fluid inclusion sample to be measured, the morphology of the corresponding microthermometer mineral plate, and a schematic diagram of the area where the target fluid inclusion is located, so as to facilitate the quick location of the target fluid inclusion using the polarizing microscope before carrying out the microthermometer operation.

[0042] Optionally, after cutting the fluid inclusion mineral sheet, which has been completely dissolved by the adhesive, according to the position of the target fluid inclusion on its surface, the preparation method further includes: collecting the remaining fragments that do not contain the target fluid inclusion, which are left after cutting the fluid inclusion mineral sheet; storing all the remaining fragments in a storage sample box; and affixing the label to the surface of the storage sample box for annotation, so as to carry out other related geological analyses and tests in the future, so as to make full use of the fluid inclusion mineral sheet.

[0043] Compared with the prior art, the advantages and beneficial effects of the embodiments of this application are as follows:

[0044] 1. This application embodiment employs a "soak-then-cut" preparation method. First, the fluid inclusion sheet is placed entirely in a petri dish containing a dissolving solution for the adhesive. The fluid inclusion mineral sheet is then gradually separated from the glass slide until the adhesive on the surface of the mineral particles in the fluid inclusion sheet is completely dissolved. The advantages of this method are: firstly, during the sol-soaking process, the fluid inclusion mineral sheet can be easily removed from the petri dish containing the adhesive dissolving solution using precision pointed stainless steel tweezers; secondly, it minimizes the probability of breakage of the fluid inclusion mineral sheet due to shaking of the dissolving solution during the sol-soaking process and during removal from the petri dish.

[0045] 2. This embodiment of the application directly places the entire uncut fluid inclusion sheet into a petri dish containing adhesive solution for sol-gel treatment. This effectively avoids the complexity, time-consuming nature, and operational difficulties of the existing "cut-then-soak" method, which involves using a glass scalpel to cut the fluid inclusion sheet into small sample pieces according to the defined temperature-measuring fluid inclusion area before sol-gel treatment. Furthermore, it facilitates the removal of the fluid inclusion mineral slice from the petri dish after detachment from the glass slide and allows for overall microscopic observation under a polarizing microscope, enabling simultaneous inspection of the adhesive dissolution status in different areas of the entire mineral slice. In contrast, the existing "cut-then-soak" method, because the fluid inclusion sheet is cut into small sample pieces for independent sol-gel treatment, requires each small sample piece to be removed from the petri dish sequentially and observed separately when inspecting the degree of sol-gel treatment under a polarizing microscope, rather than simultaneously observing all small sample pieces, thus increasing the workload. As can be seen, the method in the embodiments of this application can greatly improve the efficiency of the operation of fluid inclusion thin (mineral) sheet sol and can effectively ensure the requirements of the dissolution quality of the adhesive.

[0046] 3. This application embodiment employs a "soak-then-cut" preparation method. First, the fluid inclusion sheet is placed entirely in a petri dish containing adhesive solution to completely dissolve the adhesive. Then, a blade is used to sequentially cut the fluid inclusion sheet along the pre-defined areas of the fluid inclusions to be measured, thus creating a fluid inclusion microthermometer sheet. Compared to existing "cut-then-soak" and "cut-only" preparation methods, the fluid inclusion sheet, with its adhesive completely dissolved, is easier to cut because it separates from the glass slide. This significantly reduces the probability of breakage or damage to the target fluid inclusion area during cutting, making the cutting of the fluid inclusion sheet time-saving, labor-saving, and highly efficient. Furthermore, compared with the existing "cut-only-no-soak" preparation method, the method provided in this application has the following significant advantages: since the prepared fluid inclusion microthermometer mineral slide is separated from the glass slide, and the adhesive on the surface of the particles in the mineral slide is completely dissolved, the decrease in the accuracy of the microthermometer data (homogeneity temperature and freezing point temperature) or even the acquisition of erroneous data caused by the presence of the glass slide and adhesive can be effectively eliminated. This achieves the preparation of high-quality fluid inclusion microthermometer mineral slides, laying a solid sample foundation for the accuracy and reliability of subsequent fluid inclusion microthermometer experimental results. Attached Figure Description

[0047] Figure 1 One of the flowcharts for a method of preparing a fluid inclusion microthermometer mineral plate provided in this application embodiment;

[0048] Figure 2The second flowchart illustrates a method for preparing a fluid inclusion microthermometer mineral plate according to an embodiment of this application.

[0049] Figure 3 A microscopic image of the partial dissolution of adhesive in a fluid inclusion mineral slide under a polarizing microscope, provided as an embodiment of this application;

[0050] Figure 4 A microscopic image of the surface features of mineral particles after the adhesive in a fluid inclusion mineral slide has completely dissolved, provided as an embodiment of this application;

[0051] Figure 5 Microscopic feature image of the surface of carbonate cement in a fluid inclusion mineral slice after the adhesive has completely dissolved, provided for an embodiment of this application;

[0052] Figure 6 This is a schematic diagram illustrating a sample box for storing a microthermometer mineral sample, a label pasted on the sample box, and related information markings provided in an embodiment of this application.

[0053] In the picture:

[0054] 1. Residual adhesive residue;

[0055] 2. Surface of mineral particles;

[0056] 3. The surface of the carbonate cement filling the pores;

[0057] 4. The surface of the carbonate cement filling the cracks;

[0058] 5. Fluid inclusions;

[0059] 6. Fluid inclusion microthermometer mineral sample;

[0060] 7. The delineated fluid inclusion region of the target temperature to be measured within the mineral sheet;

[0061] 8. Sample box;

[0062] 9. Label paper;

[0063] 10. Number of fluid inclusions in the target temperature measurement object;

[0064] 11. Schematic diagram of the shape of a mineral sample containing fluid inclusions and microthermometer.

[0065] 12. Schematic diagram of the location of the fluid inclusion region of the target temperature to be measured. Detailed Implementation

[0066] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0067] Before explaining the preparation method of a fluid inclusion microthermometer mineral plate provided in the embodiments of this application, the application scenarios of the preparation method of a fluid inclusion microthermometer mineral plate provided in the embodiments of this application will be specifically described:

[0068] Crustal fluids participate in almost all geological processes on Earth, such as diagenesis, magmatism, metamorphism, tectonic-deformation processes, and mineralization. Therefore, crustal fluids largely control the mechanisms and evolution of these geological processes and geological dynamics. During these geological processes, microscopic crustal fluids trapped in the lattice defects of minerals during crystal growth—i.e., fluid inclusions—are the most direct and effective geological samples recording information about geological fluids (temperature, pressure, salinity, composition, etc.), commonly known as "paleofluid fossils." Currently, they are widely used in many branches of geoscience, including sedimentology, petrology, (solid) mineral deposit geology, petroleum geology, reservoir geology, structural geology, and (paleo)environmental geology.

[0069] Homogenization temperature and freezing point temperature are two of the most fundamental and important geochemical parameters of fluid inclusions. They are used to determine the temperature, salinity, and composition of fluids involved in geological processes. They are also key parameters required for calculating the geological environmental pressure during fluid capture using PVT simulations. Homogenization temperature and freezing point temperature are obtained through microthermodynamic testing of fluid inclusions using a hot and cold stage. However, a crucial step before this is the successful implementation of the microthermometry experiment is the effective preparation of high-quality fluid inclusion microthermometry slides to ensure the subsequent acquisition of high-precision fluid inclusion microthermometry data.

[0070] In the initial stage of fluid inclusion mineral sections, the fluid inclusions are glued onto a glass slide to form a thin section. The purpose is to conduct micro-petrographic observation of the fluid inclusions under an optical microscope and to further select suitable target fluid inclusions for thermometry. To obtain high-quality microthermometry data, a crucial step in the preparation of fluid inclusion microthermometry sections is to separate the fluid inclusion mineral section from the glass slide. If they are not separated, during thermodynamic temperature measurement using the microthermometry section with the glass slide attached after cutting, the thickness of the glass slide will cause a heat conduction process, resulting in a lag in the heating temperature of the microthermometry section. This may cause the measured homogenization temperature and freezing point temperature of the fluid inclusions to be approximately 3-5 degrees higher than the true values. o Especially when testing freezing point temperatures, using such microthermometer slides with glass mounts may yield data with significant errors or even inaccuracies. The method for preparing a fluid inclusion microthermometer slide provided in this embodiment is applied to this scenario.

[0071] Reference Figure 1 This document illustrates one of the flowcharts for a method of preparing a fluid inclusion microthermometer mineral plate according to an embodiment of this application. Figure 1 As shown, the preparation method includes:

[0072] Step 101: Provide a thin slide of fluid inclusions that has been pre-observed under an optical microscope in detail using microlithography and has the location of the fluid inclusions to be microthermally measured delineated, i.e., a glass slide with the fluid inclusion mineral slide bonded to it.

[0073] Step 102: Place the fluid inclusion sheet as a whole in a glass culture dish, inject adhesive dissolving solution into the culture dish, and immerse the entire fluid inclusion sheet in the adhesive dissolving solution to dissolve the adhesive and separate the fluid inclusion mineral sheet from the glass slide.

[0074] Step 103: After the fluid inclusion mineral slide separates from the glass slide, the fluid inclusion mineral slide continues to be immersed in the adhesive solution until the adhesive adhering to the surface of the mineral particles in the fluid inclusion mineral slide is completely dissolved.

[0075] Step 104: Using a blade, cut the fluid inclusion mineral sheet after the adhesive has been completely dissolved according to the position of the target fluid inclusion to be measured on its surface, and prepare a rock mineral fragment containing the target fluid inclusion that is the size suitable for placing in the quartz crucible of the hot and cold stage, that is: prepare a fluid inclusion microthermometer mineral sheet.

[0076] Step 105: Store the qualified microthermometer mineral slide in the sample box for later use, and affix a label to the sample box. Mark the number of the target fluid inclusion sample to be measured on the label, and draw a schematic diagram of the shape of the microthermometer mineral slide and the area where the target fluid inclusion is located.

[0077] Reference Figure 2 The second flowchart illustrates a method for preparing a fluid inclusion microthermometer mineral plate according to an embodiment of this application. Figure 2 As shown, the preparation method of this fluid inclusion microthermometer mineral plate includes the following steps:

[0078] Step 201: Provide fluid inclusion thin film: The fluid inclusion thin film, namely: a glass slide with fluid inclusion mineral slices bonded together, needs to be subjected to detailed micro-petrography observation under an optical microscope in advance and the position of the target fluid inclusion to be micro-thermometry is delineated on its surface;

[0079] The fluid inclusion mineral slice is bonded to the surface of the glass slide using adhesive. In this embodiment, the adhesive can be 502 glue (e.g., T-1 type 502 glue produced by Beijing Chemical Plant). Of course, other types of adhesives with no fluorescence or weak fluorescence can also be selected, such as fir resin. The specific type of adhesive is not limited in this embodiment.

[0080] The optical microscopes used for microlithoscopic observation of fluid inclusions include a polarizing microscope and a fluorescence microscope. The polarizing microscope is used to observe brine inclusions and hydrocarbon / non-hydrocarbon gaseous inclusions, while the fluorescence microscope is used to observe hydrocarbon inclusions containing unsaturated hydrocarbons.

[0081] It should be noted that, based on the micro-lithomorphic characteristics of the fluid inclusions, a 2B pencil is needed to delineate the appropriate location of the target fluid inclusion for subsequent microthermometry on the surface of the fluid inclusion thin section. When delineating the location of the target fluid inclusion with a 2B pencil, the circle should be as small as possible without contaminating the clarity of the imaging field of the target fluid inclusion under the optical microscope, so as to facilitate the subsequent cutting of the fluid inclusion mineral section.

[0082] Step 202: Separating the fluid inclusion mineral slice and glass slide by dissolving the adhesive in a bubble: Place the fluid inclusion thin slice as a whole in a petri dish, inject adhesive dissolving solution into the petri dish, and immerse the entire fluid inclusion thin slice in adhesive dissolving solution to gradually dissolve the adhesive, thereby separating the fluid inclusion mineral slice from the adhesive surface of the glass slide first;

[0083] The fluid inclusion sheet needs to be placed in a culture dish for a first fixed time, and the adhesive solution is required to immerse the entire fluid inclusion sheet. In this embodiment, the first fixed time of soaking the sheet in this step should be determined according to actual needs. For example, the first fixed time can be set to half an hour, one hour, or two hours. This embodiment does not make a specific limit on the specific value of the first fixed time, but based on experience, it generally does not exceed 3 hours.

[0084] Glass petri dishes are the best choice for the culture dishes;

[0085] It should be specifically noted that after the fluid inclusion sheet has been placed in the petri dish and immersed for a first fixed time, the lid of the petri dish needs to be removed, and the fluid inclusion sheet needs to be gently pushed from one side using precision pointed stainless steel tweezers to check whether the fluid inclusion sheet has completely separated from the glass slide. If the fluid inclusion sheet can move under the pushing of the precision pointed stainless steel tweezers, it indicates that the fluid inclusion sheet has completely separated from the glass slide. If the fluid inclusion sheet cannot move under the pushing of the precision pointed stainless steel tweezers, it indicates that the fluid inclusion sheet has not completely separated from the glass slide due to the adhesive. In this case, the process needs to be repeated: place the fluid inclusion sheet in the petri dish and replace the lid, place it for a first fixed time, then remove the lid of the petri dish containing the fluid inclusion sheet, and gently push the fluid inclusion sheet from one side using precision pointed stainless steel tweezers to check whether the fluid inclusion sheet has completely separated from the glass slide, until the fluid inclusion sheet has completely separated from the glass slide.

[0086] The above-mentioned operation process needs to be carried out entirely within a fume hood.

[0087] Step 203: Continue soaking the slide to further dissolve the adhesive residue on the surface of the mineral particles in the fluid inclusion slide. The specific implementation process is as follows: After the adhesive surfaces of the fluid inclusion slide and the glass slide have completely separated, use precision pointed stainless steel tweezers to hold one end of the glass slide and remove the glass slide containing the fluid inclusion slide from the petri dish. Place it on the work surface of the fume hood to allow the adhesive residue adhering to the surface of the fluid inclusion slide to evaporate naturally. When the fluid inclusion slide is semi-dry, use precision pointed stainless steel tweezers to gently push it several times from one side to prevent the fluid inclusion slide and the glass slide from sticking together due to residual adhesive residue. The cumulative adsorption force generated by the evaporation of the adhesive solution causes the two to adhere together again. After the remaining adhesive solution has completely evaporated and the fluid inclusion mineral slide is dry, a portion of the fluid inclusion mineral slide is pushed away from the surface of the glass slide using precision pointed stainless steel tweezers. A single-edged blade is then slowly inserted from the bottom of the area where the fluid inclusion mineral slide is detached from the surface of the glass slide and lifted it up. Then, the slide is placed in the palm of the hand and the top and bottom surfaces of the fluid inclusion mineral slide are turned over using the single-edged blade so that the adhesive side that was previously bonded to the glass slide is facing upwards. After that, it is placed back on the surface of the glass slide, and one end of the glass slide is held with precision pointed stainless steel tweezers to continue immersing it in the petri dish.

[0088] It should be noted that, depending on the specific circumstances, adhesive dissolving solution should be added to the petri dish intermittently to ensure that the adhesive dissolving solution always submerges the entire fluid inclusion sheet until the adhesive on the surface of the mineral particles bonded to the fluid inclusion mineral sheet is completely dissolved.

[0089] Step 204: Observation of the degree of dissolution of the adhesive on the slide under a polarizing microscope: While the fluid inclusion mineral slide with the adhesive side facing up is placed on the glass slide and immersed in a petri dish to continue dissolving the adhesive, after a second fixed immersion time (approximately 6 hours each time), the fluid inclusion mineral slide needs to be removed and observed under a polarizing microscope to check the degree of dissolution of the adhesive on the surface of the mineral particles in the fluid inclusion mineral slide. The specific implementation method of this step is as follows:

[0090] Using precision pointed stainless steel tweezers, hold one side of the glass slide and remove the fluid inclusion mineral slide from the petri dish. Place it on the work surface of the fume hood to allow the adhesive solution adhering to the surface of the fluid inclusion mineral slide to evaporate naturally. When the fluid inclusion mineral slide is semi-dry, gently push it several times from one side using the precision pointed stainless steel tweezers to prevent the cumulative adsorption force generated by the evaporation of residual adhesive solution from causing the fluid inclusion mineral slide and the glass slide surface to adhere together again. Wait until the residual adhesive solution has completely evaporated and the fluid inclusion mineral slide is completely dry. Using precision pointed stainless steel tweezers, a portion of the fluid inclusion mineral slide is pushed away from the surface of the slide. A single-edged blade is then gently inserted from the bottom of the area where the fluid inclusion mineral slide is detached from the slide surface and lifted it up. It is then placed on a new slide to support the slide, ensuring that the previous adhesive surface adheres to the surface of the new slide. Subsequently, the new slide containing the fluid inclusion mineral slide is loaded onto the stage of a polarizing microscope. Under single polarized light conditions, a high-magnification objective lens (e.g., 50x) is used to microscopically observe the degree of dissolution of the adhesive on the surface of the mineral particles in the fluid inclusion mineral slide, in order to check whether the adhesive has been completely dissolved.

[0091] If the adhesive has only partially dissolved and has not completely dissolved, such as Figure 3 As shown in (a) and (b), the surface of mineral particles in fluid inclusion mineral sheets will be blurred under a polarizing microscope due to the influence of residual adhesive; while the identification characteristics under a polarizing microscope when the adhesive is completely dissolved are as follows. Figure 4 (a) and (b) and Figure 5 As shown in (a) and (b), the mineral grains or diagenetic cements within the fluid inclusions appear clean and bright under single-polarized light, and the phase boundaries of the fluid inclusions trapped within them are clearly distinguishable; among them, Figure 3 , Figure 4 and Figure 5 The 40µm in the image is the scale bar of the microlithography photograph under a polarizing microscope.

[0092] It should be further noted that if the adhesive on the surface of the mineral particles in the fluid inclusion mineral slide is completely dissolved, the subsequent sectioning operation can be performed; if the adhesive on the surface of the mineral particles in the fluid inclusion mineral slide is not completely dissolved, the following steps need to be repeated: place the fluid inclusion mineral slide with the adhesive side facing up on the surface of a glass slide, and immerse it in a petri dish for a second fixed time (about 6 hours each time) to dissolve the adhesive. Then, remove the fluid inclusion mineral slide and place it under a polarizing microscope for microscopic observation to check the degree of dissolution of the adhesive on the surface of the mineral particles in the fluid inclusion mineral slide, until the adhesive is completely dissolved.

[0093] Based on experience, it generally takes about 2 to 3 days for the adhesive to completely dissolve;

[0094] The adhesive dissolving solution includes either acetone or anhydrous ethanol. In terms of dissolving adhesive, acetone is superior to anhydrous ethanol. In terms of potential risk factors, acetone is higher than anhydrous ethanol. If handled improperly and exposed to acetone for a long time, it may have an anesthetic effect on the human central nervous system, leading to adverse reactions such as weakness, dizziness, nausea, and headache.

[0095] In addition, the entire process of immersing the fluid inclusion thin film (mineral) in the petri dish to dissolve the adhesive must be carried out in a fume hood. The specific implementation method is as follows: During the immersion process, the ventilation function of the fume hood is turned off or its ventilation volume and ventilation rate are adjusted to a low level to prevent the adhesive solution injected into the petri dish from evaporating completely in a short time; before removing the fluid inclusion thin film (mineral) from the petri dish, the ventilation function of the fume hood must be turned on first. After ventilating for a certain period of time (about 2 to 3 minutes) to remove the gas formed by the evaporation of the adhesive solution, the sliding door of the fume hood is opened to remove the fluid inclusion thin film (mineral).

[0096] Provided the laboratory has a fume hood and uses it correctly, acetone can be selected as the best solvent for dissolving fluid inclusions in thin (mineral) sheet adhesives.

[0097] During the series of operations to dissolve the adhesive, it is also necessary to wear a disposable surgical mask and disposable nitrile gloves to prevent the gas generated by the evaporation of the adhesive solution from harming the operator's respiratory system, and to avoid the adhesive solution from causing possible allergic damage to the skin of the hands.

[0098] Step 205: Cutting fluid inclusion mineral slices: After the adhesive on the surface of the mineral particles in the fluid inclusion mineral slices is completely dissolved, use a blade to cut the fluid inclusion mineral slices according to the positions of the fluid inclusions to be measured that are pre-marked on their surface, so as to cut them into small fragments. These fragments containing the fluid inclusions to be measured are called microthermometric mineral slices.

[0099] It should be specifically noted that, during the slicing process, depending on the actual situation, a flashlight can be used to illuminate the surface of the fluid inclusion mineral slice so that the position of the fluid inclusion target to be measured, circled by a 2B pencil, can be clearly identified, thereby accurately performing the cutting operation.

[0100] The optimal type of flashlight to be used is a high-powered flashlight.

[0101] The blade is preferably a plastic-loaded adhesive remover.

[0102] Furthermore, it should be further explained that the specific requirements for cutting the microthermometer mineral pieces also include: the size of the cut microthermometer mineral pieces should be such that they can be placed in the hot and cold stage quartz crucible, and their position should be easily adjustable inside the quartz crucible; since the standard inner diameter of the hot and cold stage quartz crucible is 15 mm, the length of each side of the cut microthermometer mineral piece should ideally be controlled to around 5 mm, and the shape of the microthermometer mineral piece should ideally be a near-square or a near-rectangular shape with a small length-to-width ratio.

[0103] Step 206: Preserve qualified fluid inclusion microthermometer mineral slices and residues: Store each prepared qualified microthermometer mineral slice in a sample box for subsequent microthermometer testing; at the same time, collect the remaining fragments that do not contain the target fluid inclusions after cutting the fluid inclusion mineral slices and store them in a sample box for subsequent geological analysis and testing, so as to make full use of the fluid inclusion mineral slices.

[0104] The sample box can be any size of a coin storage box with a diameter of 12-20 mm.

[0105] Each of the sample boxes contains a corresponding qualified microthermometer mineral plate.

[0106] It should be noted that a label should be affixed to each sample box, such as... Figure 6 As shown, the corresponding label should be marked with the sample number of the fluid inclusion to be measured, the morphology of the corresponding microthermometric mineral section and a schematic diagram of the area where the fluid inclusion to be measured is located, so that the specific location of the fluid inclusion to be measured can be quickly found using a polarizing microscope before carrying out subsequent microthermometric operations. Similarly, a label should also be affixed to the surface of the sample box containing the remaining fragments of the fluid inclusion mineral section to indicate the remaining fragments.

[0107] This application provides a method for preparing a fluid inclusion microthermometer slide, guided by the core principle of "soaking before cutting". First, a thin slide of fluid inclusions with the target fluid inclusions to be measured marked is placed in a petri dish containing adhesive solution. By dissolving the adhesive, the fluid inclusion slide is gradually separated from the glass slide until the adhesive on the surface of the mineral particles in the fluid inclusion slide is completely dissolved. Then, the slide is cut according to the target fluid inclusions marked on the surface of the fluid inclusion slide to produce a qualified fluid inclusion microthermometer slide. Following this preparation method minimizes the probability of fluid inclusion mineral fragment breakage due to improper operation, whether in the dissolution of the adhesive on the slide or the cutting of the fluid inclusion mineral fragment. Furthermore, the entire preparation process is time-saving, labor-saving, and highly efficient. Because this method completely separates the fluid inclusion mineral fragment from the glass slide and completely dissolves the adhesive on the surface of the mineral particles in the fluid inclusion mineral fragment, it effectively eliminates the possibility of decreased accuracy or even erroneous data acquisition caused by the presence of the glass slide and adhesive. This method effectively meets the requirements for producing high-quality fluid inclusion microthermometry fragments and provides a solid sample foundation for the accuracy and reliability of subsequent fluid inclusion microthermometry experimental results.

[0108] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0109] Although optional embodiments of the present application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the optional embodiments as well as all changes and modifications falling within the scope of the embodiments of the present application.

[0110] Finally, it should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities.

[0111] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the principles and implementation methods of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for the preparation of a fluid-inclusion microtherm ore fragment, characterized in that, The preparation method of the fluid inclusion microthermometric section comprises the following steps: providing a fluid inclusion section that has been observed and circled under an optical microscope for detailed micro-petrographic observation, and the target fluid inclusion position to be microthermometrically measured, i.e., a glass slide with a fluid inclusion section; placing the entire fluid inclusion section in a glass culture dish, injecting a section adhesive dissolving solution into the culture dish, and immersing the entire fluid inclusion section in the section adhesive dissolving solution to dissolve the section adhesive and separate the fluid inclusion section from the bonding surface of the glass slide; after the fluid inclusion section is separated from the glass slide, the fluid inclusion section continues to be soaked in the section adhesive dissolving solution until the section adhesive adhered to the surface of the mineral particles in the fluid inclusion section is completely dissolved; using a blade to cut the fluid inclusion section with completely dissolved section adhesive according to the position of the target fluid inclusion to be measured, and prepare a rock and mineral section containing the target fluid inclusion with a size suitable for being placed in a quartz crucible of a cooling and heating stage, i.e., a fluid inclusion microthermometric section; storing the qualified microthermometric section in a sample box for later use, and pasting a label paper on the sample box, and marking the sample number of the target fluid inclusion to be measured, the shape of the microthermometric section, and the schematic diagram of the area where the target fluid inclusion is located on the label paper.

2. A method of preparing a fluid-inclusion microtherm mount according to claim 1, wherein, The optical microscope comprises a polarizing microscope and a fluorescence microscope, wherein the polarizing microscope is used to observe brine inclusions and hydrocarbon / non-hydrocarbon gas phase inclusions, and the fluorescence microscope is used to observe hydrocarbon inclusions capturing unsaturated hydrocarbons; before the entire fluid inclusion section is placed in the glass culture dish, the preparation method further comprises the following steps: circulating the position of the target fluid inclusion to be microthermometrically measured on the surface of the fluid inclusion section according to the micro-petrographic characteristics by using a 2B pencil.

3. The method of preparing a fluid-inclusion microtherm mount according to claim 1, wherein, placing the entire fluid inclusion section in a culture dish, injecting a section adhesive dissolving solution into the culture dish, and immersing the entire fluid inclusion section in the section adhesive dissolving solution to dissolve the section adhesive and separate the fluid inclusion section from the bonding surface of the glass slide, comprising the following steps: placing the fluid inclusion section in the culture dish for a first fixed time, and immersing the entire fluid inclusion section in the section adhesive dissolving solution; opening the cover of the culture dish, and pushing the fluid inclusion section from one side of the fluid inclusion section by using a precision pointed stainless steel tweezers to detect whether the fluid inclusion section is completely separated from the glass slide; if the fluid inclusion section can be moved under the pushing of the precision pointed stainless steel tweezers, it indicates that the fluid inclusion section is completely separated from the glass slide; if the fluid inclusion section cannot be moved under the pushing of the precision pointed stainless steel tweezers, it indicates that the fluid inclusion section has not been completely separated from the glass slide under the action of the section adhesive; If the fluid inclusion slice and the glass slide have not been completely separated, the following steps are repeated: re-covering the cover of the petri dish loaded with the fluid inclusion slice, placing it for a first fixed time, uncovering the cover of the petri dish loaded with the fluid inclusion slice, pushing the fluid inclusion slice from one side of the fluid inclusion slice using the precision pointed stainless steel tweezers, detecting whether the fluid inclusion slice and the glass slide are completely separated, until the fluid inclusion slice and the glass slide are completely separated.

4. The method of preparing a fluid-inclusion microtherm mount according to claim 1, wherein, After the fluid inclusion slice and the glass slide are separated, the fluid inclusion slice continues to soak in the mounting cement dissolving solution until the mounting cement adhered to the surface of the mineral particles in the fluid inclusion slice is completely dissolved, including: After the fluid inclusion slice and the glass slide are separated, one end of the glass slide is clamped using the precision pointed stainless steel tweezers, the glass slide carrying the fluid inclusion slice is taken out of the petri dish and placed on the workbench surface of the fume hood, and the mounting cement dissolving solution adhered to the surface of the fluid inclusion slice is allowed to volatilize naturally; When the fluid inclusion slice is in a semi-dry state after volatilization, the fluid inclusion slice is gently pushed from one side of the fluid inclusion slice using the precision pointed stainless steel tweezers to prevent the fluid inclusion slice and the glass slide from adhering to each other again due to the cumulative adsorption force caused by the volatilization of residual mounting cement dissolving solution on the surface of the fluid inclusion slice and the glass slide; When the residual mounting cement dissolving solution is completely volatilized and the fluid inclusion slice is in a dry state, a portion of the fluid inclusion slice is pushed away from the surface of the glass slide using the precision pointed stainless steel tweezers, and a single-edged blade is used to slowly insert from the bottom of the surface area of the glass slide and lift the fluid inclusion slice; The fluid inclusion slice is placed in the palm of the hand, and the top and bottom surfaces of the fluid inclusion slice are turned over using the single-edged blade so that the surface of the mounting cement previously adhered to the glass slide faces upward, and then the fluid inclusion slice is placed on the surface of the glass slide and clamped at one end using the precision pointed stainless steel tweezers to continue soaking in the petri dish, and the mounting cement dissolving solution is supplemented and injected into the petri dish as needed to ensure that the mounting cement dissolving solution immerses the entire fluid inclusion slice until the mounting cement adhered to the surface of the mineral particles in the fluid inclusion slice is completely dissolved.

5. A method of preparing a fluid-inclusion microtherm mount according to claim 4, wherein, After the fluid inclusion slice is placed on the surface of the glass slide and clamped at one end using the precision pointed stainless steel tweezers to continue soaking in the petri dish, the mounting cement dissolving solution is supplemented and injected into the petri dish as needed to ensure that the mounting cement dissolving solution immerses the entire fluid inclusion slice until the mounting cement adhered to the surface of the mineral particles in the fluid inclusion slice is completely dissolved, including: After soaking for the second fixed duration, the fluid inclusion slice is taken out of the petri dish using the precision pointed stainless steel tweezers, and placed on the workbench of the fume hood, allowing the adhesive glue dissolving solution attached to the surface of the fluid inclusion slice to evaporate naturally; When the fluid inclusion slice appears to be semi-dry, the fluid inclusion slice is gently pushed from one side using the precision pointed stainless steel tweezers, preventing the fluid inclusion slice and the surface of the glass slide from adhering to each other again due to the accumulated adsorption force caused by the evaporation of the residual adhesive glue dissolving solution; When the residual adhesive glue dissolving solution has completely evaporated and the fluid inclusion slice is dry, a portion of the fluid inclusion slice is pushed away from the surface of the glass slide using the precision pointed stainless steel tweezers, and a single-edged blade is used to slowly insert into the bottom of the portion of the fluid inclusion slice and lift it up, and then place it on a new glass slide to serve as a carrier, with the previously adhesive surface attached to the surface of the new glass slide; The new glass slide carrying the fluid inclusion slice is loaded onto the stage of a polarizing microscope, and under single-polarization conditions, a high-power objective lens is used to microscopically observe the degree of dissolution of the adhesive glue on the surface of the mineral particles in the fluid inclusion slice, to check whether the adhesive glue has been completely dissolved, and the identification standard under the polarizing microscope is that the mineral particles in the fluid inclusion slice are clean and bright under single-polarization, and the phase boundary of the fluid inclusion trapped in the mineral particles is clearly identifiable; If the adhesive glue on the surface of the mineral particles in the fluid inclusion slice has been completely dissolved, subsequent slicing operations are performed; If the adhesive glue on the surface of the mineral particles in the fluid inclusion slice has not been completely dissolved, the following cycle is performed: the fluid inclusion slice with the adhesive surface facing up is placed on the surface of the glass slide and soaked in the petri dish for a second fixed duration to dissolve the adhesive glue, the fluid inclusion slice is taken out and placed under the polarizing microscope for microscopic observation to check the degree of dissolution of the adhesive glue on the surface of the mineral particles in the fluid inclusion slice, until the adhesive glue is completely dissolved.

6. A method of preparing a fluid-inclusion microtherm mount according to any one of claims 1 to 5, wherein, The adhesive glue dissolving solution includes any one of acetone and anhydrous ethanol.

7. The method of preparing a fluid-inclusion microtherm mount according to claim 1, wherein, The cutting of the fluid inclusion slice with completely dissolved adhesive glue according to the position of the target fluid inclusion to be measured on the surface thereof includes: The surface of the fluid inclusion slice is irradiated by a flashlight to clearly identify the position of the target fluid inclusion to be measured circled by a 2B pencil, and the fluid inclusion slice with completely dissolved adhesive glue is cut according to the position of the target fluid inclusion to be measured on the surface thereof using the blade; The blade is a glue removing knife loaded with a plastic blade.

8. The method of preparing a fluid-inclusion microtherm mount according to claim 1, wherein, The size of the micro-thermometric ore slice is suitable for being placed in the cold and hot stage quartz crucible and for adjusting the position inside the cold and hot stage quartz crucible; the standard inner diameter of the cold and hot stage quartz crucible is 15 mm, and the length of each side of the micro-thermometric ore slice prepared by cutting is controlled to be 5 mm.

9. The method of preparing a fluid-inclusion microtherm mount according to claim 1, wherein, The sample box is selected from any one of the coin storage boxes with a diameter of 12-20 mm, and one micro-thermometric ore slice is placed in one sample box. The label paper is pasted on the sample box, and the number of the target fluid inclusion sample to be measured is marked on the label paper, and the shape of the micro-thermometric ore slice and the schematic diagram of the target fluid inclusion in the area are drawn. One label paper is pasted on each sample box, and the number of the target fluid inclusion sample to be measured is marked on the corresponding label paper, and the shape of the corresponding micro-thermometric ore slice and the schematic diagram of the target fluid inclusion to be measured in the area are drawn, so as to quickly find the position of the target fluid inclusion to be measured by a polarizing microscope before the micro-thermometric operation is carried out.

10. The method of preparing a fluid-inclusion microtherm mount according to claim 1, wherein, After the fluid inclusion ore slice completely dissolved by the adhesive tape is cut by a blade according to the position of the target fluid inclusion to be measured circled on the surface, the preparation method further comprises: The residual fragments without the target fluid inclusion to be measured left after cutting the fluid inclusion ore slice are collected, all the residual fragments are uniformly stored in a storage sample box, and the label paper is pasted on the surface of the storage sample box for marking and explanation, so as to realize the purpose of fully utilizing the fluid inclusion ore slice for subsequent related geological analysis and testing.

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