What kind of rock does granite belong to? Natural Sciences

Granite is a rock made up of more than three types of minerals. The three main minerals are quartz, feldspar, and mica (biotite and muscovite). Granite is widely distributed on the earth's surface, and it is a plutonic acid igneous rock.

The content of SiO2 is mostly more than 70%, and the color is light, usually gray-white and flesh-red. There are many types of granite, which can be divided into biotite granite, muscovite granite, mica granite, hornblende granite, etc. according to the mineral types it contains; According to the structure and structure of the rock, it can be divided into fine-grained granite, medium-grained granite, coarse-grained granite, porphyry granite and gneiss granite.

Granite is a high-quality building material because of its uniform structure, hard texture, and beautiful color. But it is important to note that some granites contain radioactive elements. People often choose brightly colored granite when decorating houses for the sake of beauty, so that it looks brightly colored, but granite is an invisible killer, and studies have proved that the use of natural granite containing radioactive minerals to decorate the ground and walls will cause people to be physically injured and prone to infertility.

What kind of granite contains radioactive minerals? Generally speaking, alkaline granite contains more radioactive minerals. Radioactive minerals are characterized by their vivid color and greasy luster.

When buying stone, it is best not to use red natural granite. Granite that does not contain radioactive minerals is grayish-white, and although the color is not very bright, it is better to choose them for safety, or to buy artificial granite slabs. From the above aspects, we should not treat granite as a mineral.

Granite is often referred to as granite, which is easily mistaken for a mineral.

Igneous. A plutonic acid igneous rock. The silica content is mostly above 70.

The color is lighter, and grayish-white and flesh-red are more common. It is mainly composed of dark minerals such as quartz, feldspar, and a small amount of biotite. The quartz content is 20 40, and the alkaline feldspar is more than plagioclase, accounting for more than 2 3 of the total feldspar.

Alkaline feldspar is a variety of potassium feldspar and albite, and plagioclase is mainly albite or feldspar. The dark mineral is dominated by biotite with a small amount of hornblende. It has a granite structure or a patchy structure.

According to the types of minerals contained, it can be divided into biotite granite, muscovite granite, hornblende granite, mica granite, etc.; According to the structural structure, it can be divided into fine-grained granite, medium-grained granite, coarse-grained granite, porphyry granite, porphyritic granite, geode granite and gneiss granite. According to the secondary minerals contained, it can be divided into cassiterite-bearing granite, niobium-bearing granite, beryllium-bearing granite, lepidolite granite, tourmaline granite, etc. Self-metamorphism such as feldspar, dolomite, and electrification are common. Granite is a widely distributed rock that has been produced in various geological eras.

The forms are mostly rock foundations, rock strains, rock clocks, etc. In terms of genesis, some people believe that granite is formed by condensation and crystallization of granite magma deep in the earth's crust or crystallization by basalt magma, while others believe that it is the result of granite crystallization caused by deep metamorphism and metasomatism. Many non-ferrous metal minerals such as copper, lead, zinc, tungsten, tin, bismuth, molybdenum, etc., such as gold, silver, rare metals such as niobium, tantalum, beryllium, etc., and radioactive elements such as uranium and thorium, are related to granite.

Granite has a uniform structure, hard texture, beautiful color, and is a high-quality building stone.

Rocks formed by magma intruding upwards and cooling condensation deep in the earth's crust or upper mantle are called intrusive rocks.

What erupts from the surface becomes igneous rock.

Granite is a --- magmatic rock or igneous rock. According to the geological genesis, rocks can be divided into three categories: igneous rocks, sedimentary rocks and metamorphic rocks. Granite belongs to igneous rocks (magmatic rocks), limestone belongs to sedimentary rocks, and marble belongs to metamorphic rocks.

Granite is mainly composed of quartz, feldspar, amphibole, pyroxene, olivine, mica and other mineral components. The Mohs hardness is above 6 degrees, and the shore hardness is between 60 and 90, and the luster and color have a great relationship with the mineral composition contained in it, which can be described as ever-changing.

Granite is a type of magmatic rock.

Granite, the main component of the continental crust, is an igneous rock formed by the condensation of magma below the earth's surface, and the main components are feldspar, mica and quartz. The etymology of granite is the Latin word granum, which means grain or grain. Because granite is a plutonic rock, it often forms well-developed mineral particles that are recognizable to the naked eye, hence the name.

Magmatic rocks, also known as igneous rocks, are rocks formed by magma erupting from the surface or invading the earth's crust for cooling and solidification, with obvious mineral crystal particles or pores, accounting for about 65% of the total volume of the earth's crust. Magma is a hot, hot, viscous, volatile silicate melt produced deep in the earth's crust or upper mantle. It is the matrix for the formation of various magmatic rocks and magmatic deposits.

The whole process of magma generation, migration, accumulation, change and condensation of rocks is called magmatism.

Granite is a magmatic rock, which is composed of crystalline isogranular feldspar, quartz and a small amount of mica, and has a massive structure of plutonic acidic rock.

The main category is magmatic rock, which is also an intrusive rock in magmatic rock, which is an ultramafic rock, and the main components are quartz, feldspar, and mica.

Granite belongs to igneous rocks Igneous rocks are mainly formed from volcanic materials such as magma. The liquid magma beneath the surface cools and solidifies. Mineral gases and liquids seep into the rock to form new crystals and various colors.

Generally dark in color. Natural granite is igneous rock, also called acid crystalline plutonic rock, is the most widely distributed rock in igneous rocks, belongs to hard stone, hard and dense rock, according to its crystal particle size can be divided into "pegmatite", "coarse" and "fine" three kinds.

Granite belongs to igneous rocks.

Granite is a plutonic acid igneous rock formed by the condensation of magma in the deep underground, and some granite is gneiss or mixed lithified rocks formed by metamorphism of magma and sedimentary rocks, mostly light flesh red, light gray, gray-white, etc. Its etymology is the Latin word granum, which means granular. Because of its hard texture and beautiful color, granite is not only a good building material, but also the first choice for open-air carving.

So what are the differences between granite and marble?

1. The characteristics of stone are different

Everything that has a texture is called marble, which is rich in marbling and has many color variations; The main spots are called granite, and the granite pattern is single, and it is generally gray and white.

2. The composition of the stone is different

Granite is an igneous rock, its composition is dominated by silica, accounting for about 65% to 75%, and the rock is hard and compact. When the silica content is greater than 65%, it is an acidic rock, and the granular structure is called granite.

Marble is the original rock in the earth's crust, and it is a metamorphic rock formed by the action of high temperature and high pressure in the earth's crust. The internal action of the earth's crust promotes the process of qualitative change of the original rocks, and its main component is calcium carbonate, accounting for more than 50%.

Granite is a hard stone, which is hard and dense, while marble is a medium hard stone, usually composed of obvious patterns and a lot of mineral particles.

3. The hardness is different

Compared with marble, granite has a higher hardness, so it is more difficult to process, but it is resistant to wind and bloom corrosion, not easy to deteriorate, and usually the appearance color can be maintained for more than 100 years, and marble because half of it contains impurities, and marble contains calcium carbonate, which is susceptible to the action of carbide, carbon dioxide and water vapor in the atmosphere to make its surface tarnished.

4. The scope of application is differentNormally, marble is used indoors, and granite is mostly used outdoors, for example, the outdoor road pavement is paved with granite, this difference is mainly determined by its radioactivity, because the radioactivity of granite is more harmful to the human body than marble, so it can only be used outdoors, and the texture of marble is relatively better, so it is used more indoors.

Igneous rocks.

Granite belongs to the intrusive rocks in acidic (SiO2>66%) magmatic rocks, which is the most common type of rock in this category, mostly light flesh red, light gray, grayish white, etc.

Medium-coarse-grained, fine-grained structure, massive structure, and some are patchy structures, spherical structures, and gneiss-like structures.

The main minerals are quartz, potassium feldspar and acid plagioclase, while the minor minerals are biotite, hornblende and sometimes a small amount of pyroxene.

There are many kinds of secondary minerals, common magnetite, zrive, zircon, apatite, tourmaline, fluorite, etc., the quartz content is the most in various magmatic rocks, its content can be from 2-5%, a few up to 5-6%.

The content of potassium feldspar is generally more than plagioclase, and the relationship between the content ratio of the two is often that potassium feldspar accounts for two-thirds of the total feldspar, plagioclase accounts for one-third, and potassium feldspar is mostly light flesh red in granite, and there are also grayish-white and gray.

Granite is a type of tectonic rock that erupts volcanically and is uplifted to the surface of the earth's crust under considerable pressure in a molten state. In the formation of the surface layer of the earth's crust, it moves slowly to cool down. It is a type of igneous rock, which is a substance formed by the cooling and solidification of magma or lava containing silicate melt.

When molten magma condenses and consolidates, minerals are formed in igneous rocks, such as olivine and pyroxene. Its densest iron-magnesium-silicate mineral, formed at the highest magmatic temperature; Less dense minerals, such as feldspar and quartz, are formed in the later stages of cooling. Minerals formed in lava can usually grow unfettered and have well-developed crystals.

What rocks do granite belong toMagmatic rocks. Magmatic rocks, also called igneous rocks, are rocks formed by magma formed deep in the earth's crust or in the upper mantle, which is formed by intrusion into the upper part of the earth's crust or ejection to the surface of the earth to cool and consolidate and undergo crystallization. Because the conditions under which it is formed are very different from sedimentary rocks, its characteristics are also markedly different from those of sedimentary rocks.

The general process starts from discovering the problem and raising the problem, and after discovering the problem, make assumptions about the answer to the problem according to their existing knowledge and life experience Design the first plan, including the selection of materials, design methods and steps, etc. After reaching a conclusion, it is also necessary to reflect on the whole process of the general methodological steps of the experiment: asking questions, making hypotheses, making plans, implementing plans, drawing conclusions, expressing and communicating

The most commonly used methods in science include observation method, experimental method, investigation method and data analysis method

Observation is a basic method of science Scientific observation can be made directly with the naked eye, with the help of magnifying glasses, microscopes and other instruments, or with the use of cameras, video recorders, video cameras and other tools, and sometimes it is also necessary to measure Scientific observation should have a clear purpose; Observations should be comprehensive, meticulous, and realistic, and recorded in a timely manner; Be planned and patient; Think positively and record in a timely manner; To exchange views and discuss The design of the experimental protocol should be carried out closely around the questions and hypotheses raised When studying the influence of one condition on the research object, the experiment carried out under the same conditions except for the different conditions is called a controlled experiment General steps: find and ask questions; gather information related to the issue; make assumptions; design of experimental protocols; Conduct experiments and record them; analysis of experimental phenomena; Conclusion Investigation is one of the common methods of science When investigating, we must first clarify the purpose of the investigation and the object of the investigation, and formulate a reasonable investigation plan During the investigation process, sometimes because the scope of the investigation is very large, it is necessary to select a part of the survey objects as samples During the investigation process, it is necessary to record truthfully The results of the investigation should be sorted out and analyzed, and sometimes the statistical methods should be used to collect and analyze data is also one of the common methods of science There are many ways to collect information Go to the library to consult books and newspapers, and visit relevant people, The form of information includes text, data, and audio-visual data, etc., and the information obtained should be sorted out and analyzed, and answers and clues should be found from it.

Granite belongs to magmatic rocks.

Granite is a type of magmatic rock, which is most widely distributed in the earth's crust, and is a crystalline rock mass formed by the gradual cooling and condensation of magma in the depths of the earth's crust, and the main components are quartz, feldspar and mica. Granite is a widely distributed rock that has been produced in various geological eras. According to the types of minerals contained, granite can be divided into black granite, muscovite granite, hornblende granite, mica granite, etc.; According to the structural structure, it can be divided into fine-grained granite, medium-grained granite, coarse-grained granite, porphyry granite, porphyritic granite, geode granite, gneiss granite and black golden sand granite.

According to the secondary minerals contained, it can be divided into cassiterite-bearing granite, niobium-bearing granite, beryllium-bearing granite, lepidolite granite, tourmaline granite, etc. Granite and basalt belong to the same magmatic rock, the difference is that when magma erupts, granite is the underground part and is formed under high pressure, and basalt is formed after magma erupts from the surface. Granite is much tighter than basalt, so it is very hard.

The Huangshan Mountains in China were formed by the underground granite after the surface was exposed in the process of crustal changes.