Device and method for counting granular particle content in rock slices

Abstract

The present invention is a device and method for counting the content of granular particles in rock slices. The device includes: a bracket and a transparent plate; the transparent plate is arranged on the bracket, and is used to fix the transparent plate on a computer screen; the transparent plate is arranged between two cavities, and a plurality of equally divided grids are evenly arranged on the surface of the transparent plate. The method is to convert the statistics of particle percentage content in rock microscope thin section identification from empirical qualitative to quantitative, which greatly reduces the error caused by human factors in traditional methods; and reduces the technical threshold of counting particle percentage content under rock thin section microscope, so that beginners can easily master it.

Description

Technical Field

[0001] The present invention relates to a device and a method for counting the content of granular particles in rock slices. Background Art

[0002] Rock microscope slices are a common carrier for studying rocks in geology. They are a kind of flake material that is ground into a thickness of less than 0.03mm. Generally, they are fixed on a glass slide and then covered with a cover glass (see Figure 1 ), and then observe and study it under a polarizing microscope. It is the carrier of information inside the rock, indicating the microscopic material composition, structure and other information of the rock. In petrological research, microscope thin section identification is a basic skill, among which the estimation of the percentage of various minerals or paleontological debris particles in the thin section is an indispensable process, which can intuitively reflect the content of various minerals or paleontological debris in the rock. The traditional method of estimating the percentage of particles in rock microscope thin sections is divided into the following two steps:

[0003] (1) Place the thin section under an optical perspective microscope and select an appropriate magnification. Use a camera connected to the microscope and computer to take photos and identify the representative areas where the minerals are evenly distributed;

[0004] (2) Select the target particles and compare their percentage with the colorimetric chart (see Figure 2 ) for comparison and estimation (generally the area ratio is approximately equal to the volume ratio).

[0005] In the traditional method, many people are not sure about the percentage of minerals or paleontological debris in thin sections during thin section identification. Identifiers usually rely on experience to estimate the percentage of various minerals or paleontological debris in thin sections. However, different identifiers have different estimates of the same type of particles in the same thin section; for beginners, due to lack of experience, the estimation error may be greater. This type of error may directly lead to deviations in the understanding and naming of rocks, thus affecting further geological research. Summary of the invention

[0006] The main purpose of the present invention is to provide a device and method for accurately counting the content of granular particles in rock slices.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a device for counting the content of granular particles in a rock slice comprises: a bracket and a transparent plate;

[0008] The transparent plate is arranged on a bracket, and is used for fixing the transparent plate on a computer screen;

[0009] The transparent plate is arranged between the two cavities, and a plurality of equally divided grids are evenly arranged on the surface of the transparent plate.

[0010] Further, it also includes a movable component, a clamping claw and an elastic component;

[0011] The bracket is provided with two cavities, each of which is in the shape of an elongated strip and is respectively and parallelly arranged on both sides of the bracket, and both ends of the cavity are provided with a first through hole and a second through hole communicating with the cavity;

[0012] The transparent plate is arranged between the two cavities;

[0013] There are two movable components, and the two movable components are respectively arranged corresponding to the two cavities. Each movable component includes a first movable rod and a second movable rod. One end of the first movable rod passes through the first through hole and is located in the cavity, and the other end is located outside the cavity and is slidably arranged along the length direction of the cavity; one end of the second movable rod passes through the second through hole and is located in the cavity, and the other end is located outside the cavity and is slidably arranged along the length direction of the cavity, and the end of the second movable rod located in the cavity is located inside the first movable rod;

[0014] There are two clamping jaws, one of which is connected to one end of the two first movable rods located outside the cavity, and the other clamping jaw is connected to one end of the two second movable rods located outside the cavity;

[0015] There are two elastic components, which are respectively arranged in the two cavities to drive the first movable rod and the second movable rod to slide towards each other.

[0016] A method for counting the content of granular particles in a rock slice, using a device for counting the content of granular particles in a rock slice, comprising:

[0017] 1. Place the slice under an optical perspective microscope for identification and take a photo to obtain a photo of the slice;

[0018] 2. Open the representative thin-section photos taken in the computer connected to the microscope and adjust the size;

[0019] 3. Fix the device for counting the content of granular particles in rock slices on the surface of the computer screen;

[0020] Fourth, different types of target particles are identified through thin-section photos, and the target particles are divided into multiple categories. Then, grid marking statistics are performed. If the target particle is completely covered by a certain grid, the grid is a valid grid and is marked on the grid; if the target particle is not covered by a certain grid, but occupies more than 1 / 2 of the grid area, it is also regarded as a valid grid and is marked on the grid; if the target particle is covered by a certain grid but occupies less than 1 / 2 of the grid area, it is regarded as an invalid grid and should be discarded;

[0021] 5. After the calibration is completed, the marks are counted.

[0022] Furthermore, in step 1, an area where the minerals are evenly distributed in the thin section is selected for photographing.

[0023] Furthermore, the size of the sheet photo in step 2 corresponds to the size of the transparent plate.

[0024] Furthermore, in step 4, when marking on the grid, choose an erasable oil-based pen for marking.

[0025] Furthermore, in step 4, different types of particles are marked with different colors, and in step 5, grids marked with different colors are counted respectively, and each color represents a type of particle.

[0026] The beneficial effects of the present invention are:

[0027] The device for counting the content of granular particles in a rock slice of the present invention is used to fix a transparent plate in front of a computer screen. Since there are multiple equally divided grids on the transparent plate, the percentage content of particles in the rock can be quantitatively counted by counting the number of grids occupied by different rock particles. The first movable rod, the second movable rod, the spring and the clamping claw are arranged to facilitate fixing the transparent plate of the device in front of the computer screen and to stably fix it, thereby facilitating quantitative counting of the percentage content of particles in the rock slice image.

[0028] The method of counting the granular particle content in rock thin sections transforms the statistics of particle percentage in rock microscope thin section identification from empirical qualitative to quantitative, greatly reducing the human error in traditional methods; it lowers the technical threshold for counting particle percentage under rock thin section microscopy, making it easy for beginners to master it. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Figure 1 A schematic diagram of the existing technology for counting the content of granular particles in rock thin sections;

[0031] Figure 2 It is a colorimetric card in the prior art;

[0032] Figure 3 It is a cross-sectional view of the device for counting the content of granular particles in a rock slice in the natural state of the present invention;

[0033] Figure 4 It is a cross-sectional view of the device for counting the content of granular particles in a rock slice of the present invention when clamping a computer screen;

[0034] Figure 5 Set up a diagram for the arrangement of the grid on the transparent board;

[0035] Figure 6 This is a photo of the slice of the present invention;

[0036] Figure 7 This is a schematic diagram of the present invention for counting the content of granular particles in rock slices.

[0037] Description of Reference Numerals

[0038] 1. Bracket; 2. Transparent plate; 21. Grid; 3. Cavity; 31. First through hole; 32. Second through hole; 41. First movable rod; 411. First protrusion; 42. Second movable rod; 421. Second protrusion; 5. Clamping claw; 6. Elastic component;

[0039] a, thin section photograph; b, type A particles; c, type B particles; d, effective grid calibration; e, matrix; f, slide; g, cover glass; h, rock thin section. DETAILED DESCRIPTION

[0040] The technical scheme in the embodiment of the present invention is described clearly and completely below in conjunction with the accompanying drawings in the embodiment of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0041] like Figure 3-Figure 7 As shown, the device for counting the content of granular particles in a rock slice comprises: a support 1 and a transparent plate 2;

[0042] The transparent plate 2 is arranged on the bracket 1, and is used to fix the transparent plate 2 on the computer screen;

[0043] The transparent plate 2 is disposed between the two cavities 3 , and a plurality of equally divided grids 21 are evenly arranged on the surface of the transparent plate 2 .

[0044] Further, it also includes a movable component, a clamping jaw 5 and an elastic component 6;

[0045] The bracket 1 is provided with two cavities 3, each of which is in the shape of an elongated strip and is arranged in parallel and correspondingly on both sides of the bracket 1, and both ends of the cavity 3 are provided with a first through hole 31 and a second through hole 32 communicating with the cavity 3;

[0046] The transparent plate 2 is arranged between the two cavities 3;

[0047] There are two movable components, which are respectively arranged corresponding to the two cavities 3. Each movable component includes a first movable rod 41 and a second movable rod 42. One end of the first movable rod 41 passes through the first through hole 31 and is located in the cavity 3, and the other end is located outside the cavity 3 and is slidably arranged along the length direction of the cavity 3; one end of the second movable rod 42 passes through the second through hole 32 and is located in the cavity 3, and the other end is located outside the cavity 3 and is slidably arranged along the length direction of the cavity 3, and the end of the second movable rod 42 located in the cavity 3 is located inside the first movable rod 41;

[0048] There are two clamping jaws 5, one of which is connected to one end of the two first movable rods 41 outside the cavity 3, and the other clamping jaw 5 is connected to one end of the two second movable rods 42 outside the cavity 3;

[0049] There are two elastic components 6 , which are respectively disposed in the two cavities 3 to drive the first movable rod 41 and the second movable rod 42 to slide toward each other.

[0050] In the device for counting the content of granular particles in rock slices of the present invention, the material of the transparent plate 2 can be PVC, or other transparent materials can be selected, with a thickness of 0.1 mm. A plurality of appropriately equally divided grids 21 are made on one side of the transparent plate 2, and the size of a single grid 21 is smaller than the cross-sectional size of the smallest particle in the rock slice h under a 10*2.5x microscope. The specific transparent plate 2 is recommended to be 10 cm*10 cm, or other sizes. It is recommended to divide the side length of the transparent plate 2 into 30 equal parts and make a 30*30 specification grid 21.

[0051] The first movable rod 41 is cylindrical, and one end of the first movable rod 41 located in the cavity 3 is provided with a circle of first protrusions 411 inwardly along the radial direction toward the central axis of the first movable rod 41;

[0052] One end of the second movable rod 42 located in the cavity 3 is located in the first movable rod 41, and this end of the second movable rod 42 is radially outwardly provided with a circle of second protrusions 421;

[0053] The elastic component 6 is a spring, which is sleeved outside the second movable rod 42 and located between the first protrusion 411 and the second protrusion 421 .

[0054] Each clamping jaw 5 is a horizontal plate, one of which is fixed to one end of the two first movable rods 41 outside the cavity 3, and the two first movable rods 41 are located on one side of the horizontal plate. The other horizontal plate is fixed to one end of the two second movable rods 42 outside the cavity 3, and the two second movable rods 42 are located on one side of the horizontal plate.

[0055] In the device for counting the content of granular particles in rock slices of the present invention, the two cavities 3 can be arranged vertically on the bracket 1, in which case the first movable rod 41 is located on the left side of the bracket 1, and the second movable rod 42 is located on the right side of the bracket 1. The two cavities 3 can also be arranged horizontally on the bracket 1, in which case the first movable rod 41 is located on the upper side of the bracket 1, and the second movable rod 42 is located on the lower side of the bracket 1. When the two cavities 3 are arranged vertically on the bracket 1, the clamping jaws 5 connected to the first movable rod 41 and the second movable rod 42 are used to clamp the left and right ends of the computer screen, the two first movable rods 41 drive the left clamping jaws 5 to clamp the left end of the computer screen, and the two second movable rods 42 drive the right clamping jaws 5 to clamp the right end of the computer screen. When the two cavities 3 are arranged on the left and right sides of the bracket 1, the clamping claws 5 connected to the first movable rod 41 and the second movable rod 42 are used to clamp the upper and lower ends of the computer screen. The two first movable rods 41 drive the upper clamping claws 5 to clamp the upper end of the computer screen, and the two second movable rods 42 drive the lower clamping claws 5 to clamp the lower end of the computer screen.

[0056] In this embodiment, the clamping claw 5 clamps the upper and lower ends of the computer screen as an example. The first movable rod 41 passes through the first through hole 31 from the top of the cavity 3, so that the bottom of the first movable rod 41 is located in the cavity 3, the top of the first movable rod 41 is located outside the cavity 3, and the lengths of the two first movable rods 41 in the cavity 3 are the same, that is, the lengths of the first movable rods 41 outside the cavity 3 are also the same.

[0057] The second movable rod 42 passes through the second through hole 32 from the bottom of the cavity 3, so that the top of the second movable rod 42 is located in the cavity 3, and the bottom of the second movable rod 42 is located outside the cavity 3. The lengths of the two second movable rods 42 located in the cavity 3 are also the same, that is, the lengths of the two second movable rods 42 located outside the cavity 3 are the same. The top of the second movable rod 42 passes through the bottom of the first movable rod 41, and the top part of the second movable rod 42 is located inside the bottom of the first movable rod 41.

[0058] A circle of inward first protrusions 411 is arranged at the bottom of the first movable rod 41, and a circle of outward second protrusions 421 is arranged at the top of the second movable rod 42, and the spring is placed between the first protrusions 411 and the second protrusions 421. There are two clamping claws 5, that is, two horizontal plates, one side of which is connected to the two first movable rods 41, and the other side is used to clamp the upper end of the computer screen, and one side of the other horizontal plate is connected to the two second movable rods 42, and the other side is used to clamp the lower end of the computer screen. The two horizontal plates clamping the computer screen are located on the same side, which is convenient for clamping the computer screen.

[0059] When the top of the first movable rod 41 is flush with the top of the cavity 3, the bottom of the second movable rod 42 is flush with the bottom of the cavity 3. At this time, the distance between the bottom of the first movable rod 41 and the top of the second movable rod 42 is the largest, and the spring is in a natural state. When clamping the computer screen, hold the two clamping claws 5 and move the two clamping claws 5 in opposite directions. During this process, the first movable rod 41 moves upward and the second movable rod 42 moves downward, so that the distance between the bottom of the first movable rod 41 and the top of the second movable rod 42 is reduced, and the spring is compressed. The spring gives the first movable rod 41 and the second movable rod 42 an elastic force to move toward each other. At this time, the two clamping claws 5 are clamped to the two ends of the computer screen, and the clamping can be more stable under the elastic force of the spring.

[0060] A buffer layer can be provided on one side of the horizontal plate clamping the computer screen to protect the computer screen.

[0061] The present invention facilitates fixing the transparent plate 2 in front of a computer screen, and quantitatively counting the percentage of particles in the rock slice h image according to the grid 21 on the transparent plate 2.

[0062] The method for counting the content of granular particles in rock slices, using the above-mentioned device, comprises the following steps:

[0063] 1. Place the thin section under an optical perspective microscope for identification, and select an area in the thin section where the minerals are evenly distributed to take a photo, to obtain thin section photo a;

[0064] 2. Open the photographed representative thin slice photo a in the computer connected to the microscope, and adjust the size so that the size of the thin slice photo a corresponds to the size of the transparent plate 2;

[0065] 3. Fix the device for counting the content of granular particles in the rock slice on the surface of the computer screen, and make the position of the transparent plate 2 correspond to the position of the slice photo a;

[0066] Fourth, identify different types of target particles through the thin film photo a, and divide the target particles into multiple categories, such as category A, category B, category C, etc., and then mark and count the grids 21. When marking, use an erasable oil pen to mark different types of target particles on the grid 21. You can use pens of different colors for marking to facilitate distinction. If the target particle is completely covered by a certain grid 21, the grid 21 is a valid grid 21 and is marked on the grid 21; if the target particle is not covered by a certain grid 21, but occupies more than 1 / 2 of the area of ​​the grid 21, it is also regarded as a valid grid 21 and is marked on the grid 21; if the target particle is covered by a certain grid 21, but is less than 1 / 2 of the area of ​​the grid 21, it is regarded as an invalid grid 21 and should be discarded;

[0067] 5. After marking, count the marks.

[0068] In this embodiment, there are two types of particles, A and B, in the thin slice, and the total number of grids 21 on the transparent plate 2 is known to be M. Through the grid 21 marking method, it is obtained that the number of grids 21 occupied by type A particles b is p, and the number of grids 21 occupied by type B particles c is q, then the percentage content of type A target particles is p / M*100%, and the percentage content of type B target particles is q / M*100%. Similar to the traditional statistical method, this method also approximates the area ratio occupied by the target particles in the picture to the volume ratio. Generally speaking, the material in the rock thin slice h is composed of two parts: fine matrix e and granular material. To count the content of matrix e in the thin slice, it is only necessary to subtract the sum of all particle contents from 100%.

[0069] After the target particles are counted, the color marked by the oil pen in the grid 21 can be erased for reuse; this method is suitable for the statistics of granular, near-granular, spherical, ellipsoidal, columnar and other materials, such as olivine, quartz, feldspar, gravel, coral fossil fragments, crinoid fossil fragments, etc., but is not suitable for the statistics of flaky minerals, such as mica.

[0070] This invention transforms the statistics of particle percentage in rock microscopic thin section identification from empirical qualitative to quantitative, greatly reducing the errors caused by human factors in traditional methods; it lowers the technical threshold for counting particle percentage under rock thin section h microscope, making it easy for beginners to master it.

[0071] The above description is only a preferred embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A method for counting the content of granular particles in rock slices, characterized in that: An apparatus for counting the content of granular particles in a rock thin section comprises: a support (1) and a transparent plate (2); The transparent plate (2) is arranged on the bracket (1) and is used to fix the transparent plate (2) on the computer screen; The transparent plate (2) is arranged between the two cavities (3), and a plurality of equally divided grids (21) are evenly arranged on the surface of the transparent plate (2); It also includes a movable component, a clamping claw (5) and an elastic component (6); Two cavities (3) are provided on the bracket (1), each cavity (3) is in the shape of an elongated strip and is arranged in parallel and correspondingly on two sides of the bracket (1), and both ends of the cavity (3) are provided with a first through hole (31) and a second through hole (32) which are in communication with the cavity (3); The transparent plate (2) is arranged between the two cavities (3); There are two movable components, and the two movable components are respectively arranged corresponding to the two cavities (3). Each movable component comprises a first movable rod (41) and a second movable rod (42). One end of the first movable rod (41) passes through the first through hole (31) and is located in the cavity (3), and the other end is located outside the cavity (3) and is slidably arranged along the length direction of the cavity (3); one end of the second movable rod (42) passes through the second through hole (32) and is located in the cavity (3), and the other end is located outside the cavity (3) and is slidably arranged along the length direction of the cavity (3), and the end of the second movable rod (42) located in the cavity (3) is located inside the first movable rod (41); There are two clamping jaws (5), one of which is connected to one end of the two first movable rods (41) located outside the cavity (3), and the other clamping jaw (5) is connected to one end of the two second movable rods (42) located outside the cavity (3); There are two elastic components (6), and the two elastic components (6) are respectively arranged in the two cavities (3) to drive the first movable rod (41) and the second movable rod (42) to slide towards each other; A method for counting the content of granular particles in a rock slice, using the above device, comprises:

1. Place the thin slice under an optical perspective microscope for identification and take a photo to obtain a thin slice photo (a); 2. Open the representative thin-section photo (a) taken on the computer connected to the microscope and adjust the size; 3. Fix the device for counting the content of granular particles in rock slices on the surface of the computer screen; 4. Identify different types of target particles through the thin slice photo (a), classify the target particles into multiple categories, and then mark and count the grids (21). If the target particle is completely covered by a certain grid (21), the grid (21) is a valid grid (21) and is marked on the grid (21); if the target particle is not covered by a certain grid (21), but occupies more than 1 / 2 of the area of ​​the grid (21), it is also regarded as a valid grid (21) and is marked on the grid (21); if the target particle is covered by a certain grid (21) but occupies less than 1 / 2 of the area of ​​the grid (21), it is regarded as an invalid grid (21) and is discarded; 5. After marking, count the marks.

2. The method for counting the content of granular particles in rock slices according to claim 1, characterized in that: Step 1: Select an area in the thin section where the minerals are evenly distributed and take a photo.

3. The method for counting the content of granular particles in rock slices according to claim 1, characterized in that: The size of the sheet photo (a) in step 2 corresponds to the size of the transparent plate (2).

4. The method for counting the content of granular particles in rock slices according to claim 1, characterized in that: Step 4: When marking on the grid (21), use an erasable oil-based pen.

5. The method for counting the content of granular particles in rock slices according to claim 1, characterized in that: In step 4, different types of particles are marked with different colors, and in step 5, the grids (21) marked with different colors are counted respectively, and each color represents a type of particle.

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