Do magnetic rocks belong to magmatic rocks

Magnetic rocks do not necessarily belong to magmatic rocks.

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. Magnetic rocks are mainly magnetite, and magnetite is mostly igneous rocks, but it is true that a small number of magnetite particles are found in metamorphic or sedimentary rocks. Therefore, it can only be said that most of the magnetic rocks are magmatic rocks, but other types of rocks must not be magnetic, except for igneous rocks.

Magmatic rock classification: granite, peridotite, basalt, andesite, rhyolite.

1. Granite.

It is the most widely distributed plutonic intrusive rock. The main mineral components of granite are quartz, feldspar and mica, with light gray and fleshy red being the most common, with equigranular and massive structures. According to the different components of minor minerals, it can be divided into biotite granite, hornblende granite, etc.

Many metal minerals, such as tungsten, tin, lead, zinc, mercury, gold, etc., rare earth elements and radioactive elements are closely related to granite. Granite is both beautiful and has high compressive strength, making it a high-quality building material.

2. Peridotite.

A type of peridotite of intrusive rocks. The main mineral components are olivine and pyroxene, dark green or greenish-black, with a large proportion and granular structure. It is the only parent rock of platinum and chrome ore, and nickel, diamond, asbestos, siderite, talc, etc. are also related to this type of rock.

3. Basalt.

One of the most widespread ejecta rocks. The mineral composition is mainly plagioclase and pyroxene, black or gray-black, with stomatal structure, almond-like structure and porphyry structure. According to the composition of minor minerals, it can be divided into olive basalt, hornblende basalt, etc.

Useful minerals such as copper, cobalt, and ice island stone are often produced in basalt pores, and basalt itself can be used as a casting stone raw material with excellent wear resistance and acid resistance.

4. Andesite.

One of the ejecta rocks, which is widely distributed, second only to basalt. The main mineral components of andesite are plagioclase, amphibole and a small amount of pyroxene. When fresh, it is grayish-black, gray-green or brown with a patchy structure. The minerals related to andesite are mainly copper, followed by gold, lead, zinc, etc.

5. Rhyolite.

Rhyolite is an ejecta rock that is chemically comparable to granite. Generally light in color, mostly light red, gray-white or gray-red, with a patchy structure and a rheological structure. Rhyolite is hard and dense in nature and can be used as a building material.

1. Most of the magmatic rocks are massive crystalline rocks, and some are vitreous structure rocks.

2. The endemic minerals in magmatic rocks have unique structures and structures, such as stomatae, almonds and rhyolites.

3. The magmatic rock mass has no bedding.

4. The magmatic rock mass often contains fragments of surrounding rock, and these traps often have thermal metamorphism.

5. There is a lack of any biological remains in the magmatic rock.

6. The minerals in the intrusive magmatic rock are relatively evenly distributed, and the rock is block-like. The ejected rhyolite will show some flow structures; and stomatae, rhyolites, ropes, and almonds in andesite and basalt.

7. The main rock-forming minerals of magmatic rocks are, quartz, feldspar, amphibole, biotite, pyroxene, and olivine. The former minerals are predominantly in acidic magmatic rocks, while the latter is preferred in mafic magmatic rocks. The overall is silicon-aluminum minerals and iron-magnesium minerals.

Therefore, the color of the rock varies from flesh red to off-white to black.

Classification of the composition of magmatic rocks:Magmatic rocks are divided into ultramafic rocks, mafic rocks, neutral rocks, and acid rocks according to the content of silica.

Ultramafic rocks: the content of silica is less than 45%, such as peridotite, pyroxene, bitter olive, etc.

Mafic rocks: the content of silica is greater than 45% and less than 52%, such as basalt, gabbro, etc.

Neutral rock: the content of silica is greater than 52% and less than 65%, such as diorite, andesite, etc.

Acidic rocks: the content of silica is greater than 65%, such as granite, rhyolite, etc.

a.Granite.

b.Conglomerate. c.Petroleum.

d.Calcite.

e.Basalt.

e.The cress rock crystal is suspicious.

Correct Answer: Granite; Conglomerate. Basalt.

The following are (c).

a.Concrete bBrick CPebble.

Analysis: Rocks are natural, relatively hard, widely distributed on the earth, and are produced under the action of various geologies. Rock is a collection of minerals and is the main substance that makes up the earth's crust, pebbles belong to rocks, and concrete and bricks do not belong to rocks.

It can be seen that c is in line with the topic.

2.Among the following things that belong to rocks is (c).

a, feldspar b, calcite c, pumice d, quartz.

Analysis: It mainly examines the relationship between minerals and rocks, rocks are made up of minerals, minerals are made up of elements, and the earth's crust is made up of rocks

a. Feldspar is a mineral, so it does not conform to the topic;

b. Calcite is a mineral, so the idea of loss does not conform to the topic;

c. Pumice belongs to rocks, so it is correct;

d. Kongna quartz is a mineral, so it does not meet the topic

Common volcanic rocks include basalt, andesite, and rhyolite.

First, magmatic rocks are divided into four categories according to acidity, and then several rock types are divided into each major group according to alkalinity, which are the main members of the large magmatic rock family. For example, the large category of ultramafic rocks: the calc-alkaline series of rocks is peridotite-peridotite; The more alkaline rocks are diamond-bearing kimberlite; The peralkaline rocks are neonite-nepheline rocks and carbonate rocks.

Mafic rocks: The calc-alkaline series of rocks are gabbbro-basalt; The corresponding alkaline rock types are alkaline gabbro and alkaline basalt. Neutral rock category:

The calc-alkaline series is diorite-andesite; The alkaline series is syenite-rough rocks; The peralkaline rocks are nepheline syenite-ringstones. Acidic rocks: mainly granite-rhyolites of the calcium-alkaline series.

Common rocks come.

Magmatic rocks: granite, peridotite, basalt, andesite, rhyolite.

Magmatic rock refers to the rock formed by the cooling and condensation of magma in the underground molten state, and it is generally believed that the asthenosphere is the birthplace of magma, and the asthenosphere is due to the decay of the earth's radioactive elements, which produces huge heat energy, making the rock melt to form magma in a molten state.

These magma, located deep underground, rise under tremendous pressure along the cracks between the rock layers, and eventually cool near or on the surface to form magmatic rocks. Magmatic rock is a common rock, and its physical properties have a lot to do with where the magma cools.

Because the underground fissures of magma are cooled under the pressure of the surrounding rocks, the intrusive rocks formed often have the characteristics of being dense and hard, and because they are located underground, the magma has a longer cooling time, so the formed rocks have enough time to crystallize the minerals, so the intrusive rocks tend to have coarse mineral grains, and granite is the representative of the intrusive rocks.

Common magmatic rocks are:

1. Acid rock:

Acid rocks are a type of igneous rocks. Refers to magmatic rocks with a silica content greater than 65%. It is characterized by low iron, magnesium and calcium content.

Dark minerals are less abundant. The color is mostly grayish-white.

2. Neutral rocks:

Neutral rocks are lighter in color, mostly light gray, and have a smaller specific gravity than mafic rocks. The chemical composition characteristics are SiO2 is 53-65%, iron, magnesium and calcium are lower than mafic rocks, Al2O3 is 16-17%, which is slightly higher than mafic rocks, and Na2O+K2O can reach 5%, which is significantly higher than mafic rocks.

3. Mafic rocks:

The color of mafic rocks is lighter than that of ultramafic rocks, and the specific gravity is slightly smaller, generally around 3. Its chemical composition is characterized by SiO2 content of 45-53%, Al2O3 content of 15%, and CAO content of 10%, all of which are higher than those of ultramafic rocks, while the contents of FeO and MGO are lower than those of ultramafic rocks.

4. Ultramafic rocks:

The ultramafic rocks are relatively dark in color, most of them are black-gray and dark green, and the specific gravity is also very large, generally above, so they are very hard and often have dense massive structures.

Its chemical composition is characterized by the lowest acidity, with a SiO2 content of less than 45%; The alkalinity is also very low, generally less than 1% of K2O+Na2O.

Common volcanic rocks include basalt, andesite, and rhyolite. Rocks formed when lava rises before reaching the surface but condenses at a certain depth in the earth's crust are called intrusive rocks.

Hello landlord! SiO2 is the most dominant oxide in magmatic rocks, so its content varies regularly.

It is the main basis for the classification of magmatic rocks. According to acidity.

That is, the SiO2 content, which can divide the magmatic rocks.

into four major groups: ultramafic rocks (SiO2< 45%.

Granite, according to the types of minerals it contains, can be divided into black granite, biotite granite, hornblende granite, mica granite, etc.;

Dark green granite.

According to the structural structure, it can be divided into fine-grained granite, medium-grained granite, coarse-grained granite, porphyritic 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, micite, and tourmaline is common. Granite is a widely distributed rock that has been produced in all geological eras.

The forms are mostly rock foundations, rock strains, rock clocks, etc.

Landlord, you are good! SiO2 is the most important oxygen in magmatic rocks

Chemical, therefore, DAO its content varies regularly.

It is the main basis for the classification of magmatic rocks. According to acidity.

That is, the SiO2 content, which can divide the magmatic rocks.

into four major groups: ultramafic rocks (SiO2

Mafic rocks (SiO2

45-52%), neutral rock.

SiO252-66%) and acidic rocks (SiO2

1. Granite: Granite is an acidic plutonic rock, mostly flesh-red and light gray. Its main minerals are potassium feldspar, quartz and acid plagioclase, and the minor minerals are biotite and amphibole. Isogranular structure of holocrystalline, massive structure.

2. Rhyolite: Rhyolite is an acidic ejecta rock, mostly gray, gray-white and gray-red and other lighter colors. Porphyritic structure, fine porphyry crystals are minerals such as orthoclase and quartz, and the matrix is cryptocrystalline or vitreous, often with rhyolite structure.

3. diorite: diorite is a neutral plutonic rock, light gray to dark gray, and its main mineral components are neutral plagioclase and hornblende, followed by biotite, pyroxene and quartz. It has an equigranular structure and a block-like structure.

4. Andesite: Andesite is a neutral ejecta rock. It is grayish, reddish-brown or light brown. It is often in a porphyry structure, with plagioclase, hornblende and pyroxene, and the matrix is cryptocrystalline or vitreous, and it is also often in an anaphrotic structure. It is often a blocky and stomatal structure.

5. Gabbro: Gabbro is a mafic plutonic rock, black or gray-black, and its mineral composition is mainly mafic plagioclase and pyroxene, and also contains a small amount of hornblende, olivine, etc. It has a medium- and coarse-grained structure and a block-like structure.

6. Diabase: Diabase is a mafic epigenetic rock, dark green or black, and the mineral composition is the same as that of gabbro. It has a fine-grained or diagnogreen structure. Although lumpy or almond-shaped structure.

7. Basalt: Basalt is a widely distributed mafic ejecta rock, which is black, gray-green and dark violet, and its main mineral composition is the same as that of gabbro, mostly in fine-grained to cryptocrystalline structure, as well as vitreous structure and porphyry structure. Dense mass, stomatal structure and almond-shaped structure are common, and columnar joints are generally developed.

Common magmatic rocks include granite, andesite and basalt.

1) Basalt: It is formed by the rapid cooling of magma from the ground erupted from the crater.

2) Andesite: It is formed by the gradual condensation of magma through gentle eruption and overflow.

3) Granite: Magma does not eject from the ground, but is formed by slowly cooling underground.

1. Fill in the blanks with rocks.

Hard rocks, huge rocks, dazzling rocks, hideous rocks, smooth rocks, protruding rocks.

2. Rock is a solid aggregate composed of one or several minerals and natural glass with a stable shape. Rocks composed of a mineral are called monomineral rocks, such as marble composed of calcite, quartzite composed of quartz, etc.; Rocks composed of several minerals are called complex minerals, such as granite composed of minerals such as quartz, feldspar and mica, gabbro composed of mafic plagioclase and pyroxene, and so on. Liquids such as oil, gases such as natural gas, and loose sand and mud that do not have a certain shape are not rocks.

Rock is one of the materials that make up the earth's crust and is the main component that makes up the Earth's lithosphere. Feldspar is the most important rock-forming component of the earth's crust, accounting for 60%, and quartz is the second most abundant ore.

Rocks are classified according to their genesis, structure, and chemical composition, with most rocks containing silica (SiO2) and the latter component of the earth's crust. The amount of silicon in a rock is one of the important factors that determine the properties of a rock.

Rocks were an important tool of early human beings and were of great significance in human evolution. Therefore, the first period of human civilization is known as the Stone Age. Rocks have always been an important material and tool for human life and production.