Limestone is not a natural material What is limestone

Yes, of course! Limestone.

Carbonate rocks with calcite as the main component. Sometimes it contains dolomite, clay minerals and detrital minerals, gray, gray-white, gray-black, yellow, light red, brown-red and other colors, the hardness is generally not large, and the reaction with dilute hydrochloric acid is violent. The structure is more complex, and there are two types: clastic structure and grain structure.

The detrital structure is mostly composed of particles, mud matrix and bright crystalline cement. Grains, also known as granular chips, mainly include internal debris, biological detritus and oolitic grains, etc., the mud crystal matrix is a plaster composed of calcium carbonate fines or crystals, and the particles are mostly less than millimeters, and the bright crystal cement is a chemical precipitate filled in the pores between the rock particles, and it is a calcite crystal particle with a diameter greater than millimeters; Grain structure is a crystalline particle formed by chemical and biochemical precipitation. According to the genesis, it can be divided into granular limestone, biolimestone and chemical limestone.

Limestone is mainly formed in the environment of shallow sea, and in the limestone development area, karst landforms of different forms are often formed. Limestone is the main raw material for burning lime and cement, and is a flux for ironmaking and steelmaking.

Yes, as long as it is not synthetic, it is a natural material that occurs naturally in nature.

Limestone is one of the most widely distributed minerals in the earth's crust. According to its sedimentary area, the limestone is divided into marine sedimentary and terrestrial sedimentation, with the former being the majority; According to its genesis, limestone can be divided into three types: biosedimentary, chemical sedimentary and secondary. According to the composition of the ore, limestone can be divided into three types: siliceous limestone, clayey limestone and dolomitic limestone.

Summary. Difference Between Tuff and Limestone.

Hello dear, under normal circumstances granite and tuff are easily distinguished, one is holocrystalline rock, the other is volcaniclastic rock, and they can be divided into two types of rocks without a magnifying glass. However, this is when the granite grain size is relatively large (reaching medium to medium grain), if the grain size is relatively small, granite and crystalline tuff (crystal chips should be small and many) are indeed more long, because crystalline tuff contains the three major rock-forming minerals of granite, and it must be noted that crystalline tuff with obvious devitrification is more like granite.

The second case: when granite intrudes into the tuff strata, the rocks at the contact site of the two of them may have the characteristics of two rocks at the same time (mixed), that is, the tuff is metamorphic, and when the metamorphism is appropriate, it is not easy to distinguish from granite with the naked eye.

In the final analysis, tuff is a volcaniclastic rock, and there is cementation between the mineral particles (whether siliceous or what), granite is a plutonic intrusive rock, and the mineral particles are closely connected, and there is no cementation statement, that is, there is no cementation between the grains, and it can be distinguished if you carefully identify them.

Difference Between Tuff and Limestone.

The difference between tuff and limestone is dear, granite and tuff are easy to distinguish under normal circumstances, one is holocrystalline rock, the other is volcaniclastic rock, and they can be divided into two types of rocks without a magnifying glass. However, this is when the granite grain size is relatively large (reaching medium to medium grain), if the grain size is relatively small, granite and crystalline tuff (crystal chips should be small and many) are indeed more long, because crystalline tuff contains the three major rock-forming minerals of granite, and it must be noted that crystalline tuff with obvious devitrification is more like granite. The second scenario:

When granite intrudes into the tuff formation, the rocks at the contact site of the two of them may have the characteristics of two rocks at the same time (mixed), that is, the tuff is metamorphic, and when the metamorphism is appropriate, it is not easy to distinguish from granite with the naked eye. In the final analysis, tuff is a volcaniclastic rock, and there is cementation between the mineral particles (whether siliceous or what), granite is a plutonic intrusive rock, and the mineral particles are closely connected, and there is no cementation statement, that is, there is no cementation between the grains, and it can be distinguished if you carefully identify them. Hope it helps.

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In daily life, we often hear about lime and cement in combination, but limestone is relatively unfamiliar. So what is limestone? Next, I will give you a detailed introduction to limestone, let's take a look.

Limestone is known as limestone, and its main component is calcite, but it also contains some clay minerals, dolomite and detrital minerals. Limestone has gray-white, gray, gray-black, yellow, brown-red, light red and other colors, the hardness is not very large, and it will have a violent chemical reaction with dilute hydrochloric acid, which belongs to sedimentary rocks.

The structure of limestone.

1. Limestone is formed in a shallow sea environment, and can be divided into granular limestone, chemical biochemical limestone, and bioskeleton limestone according to its composition. According to its structure, it can be divided into oolitic limestone, bamboo leaf limestone, clump limestone, leopard skin limestone, etc. The main component of limestone is caCO3, which is easy to dissolve, so there will be many karst caves and stone forests in the limestone area.

2. Limestone can be used to burn cement and lime, and can also be used as a flux for ironmaking and steelmaking. The structure of limestone is more complex, with two types: grain structure and clastic structure. Particle structure is a crystalline particle formed by chemical and biochemical precipitation.

The structure of crushed hail debris is mostly composed of particles, mud crystal matrix and bright crystal cement. Pellets, also known as granular chips, are mainly composed of oolitic grains, biological detritus, internal detritus, etc.

The formation process of limestone.

The main component of limestone is calcium carbonate, which can be dissolved in water containing carbon dioxide, usually a liter of water containing carbon dioxide can dissolve about 50 mg of calcium carbonate. Calcium carbonate deposited in shallow seas, after losing water, will be compacted and cemented to form rocks, which are limestone. Limestone contains more than 50% calcite, and there are some magazines such as silt and clay.

Most of the limestone formation is related to biological processes, and the limestone formed by the accumulation of biological remains includes algal limestone, coral limestone, and shell limestone.

Limestone is used as a coating material and a brick and tile binder, and is an important industrial raw material in metallurgy, building materials, chemical industry, light industry, construction, agriculture and other special industrial sectors. Limestone is referred to as limestone, and it is a carbonate rock with calcite as the main component. Sometimes it contains dolomite, clay minerals and detrital minerals, gray, gray-white, gray-black, yellow, light red, brown-red and other colors, the hardness is generally not large, and there is a violent chemical reaction with dilute hydrochloric acid.

It belongs to sedimentary rocks according to its genetic classification. Limestone is mainly formed in a shallow sea environment.

The limestone structure is more complex, with two types: clastic structure and grain structure. The detrital structure is mostly composed of particles, mud matrix and bright crystalline cement. Grains, also known as granular chips, mainly include internal debris, biological detritus and oolitic grains, etc., the mud crystal matrix is a plaster composed of calcium carbonate fines or crystals, and the particles are mostly less than millimeters, and the bright crystal cement is a chemical precipitate filled in the pores between the rock particles, and it is a calcite crystal particle with a diameter greater than millimeters; Grain structure is a crystalline particle formed by chemical and biochemical precipitation.

Limestone is a biochemically formed limestone that is often rich in organic remains. Limestone generally contains some dolomite and clay minerals, and when the clay mineral content reaches 25% to 50%, it is called argillaceous rock. When the dolomite content reaches 25% to 50%, it is called dolomitic limestone.

Limestone is widely distributed, the lithology is uniform, easy to mine and process, and it is a very versatile building material.

Comprehensive utilization of technical methods and technological processesThe characteristics of limestone resources in China are large reserves and good quality. Therefore, the larger limestone mines in China use the washing-crushing-grading method to treat limestone ore to remove the pollution of sand and gravel by surface soil, sand and cohesive mud mass. For low-grade limestone or limestone with large differences in ore properties, some foreign countries use flotation method or photoelectric beneficiation method.

For example, the separation of limestone and quartz from iron by flotation method, the separation of limestone and dolomite from magnesite by flotation method or photoelectric beneficiation method.