What is the difference between an active volcano and a dead and alive mountain?

Active volcanoes are volcanoes that have often erupted during human history, such as the famous Mount Vesuvius in Italy and some volcanoes in Indonesia; An extinct volcano is a volcano that has not erupted in the period of human history, but an extinct volcano is not necessarily completely dead, and it may erupt someday in the future, and most of the volcanoes in our country are extinct volcanoes.

An active volcano will erupt, and an extinct volcano will not erupt, there is hope.

It's very simple, and it makes sense. Active volcanoes can erupt at any time, while extinct volcanoes do not.

The main difference between an active volcano and an extinct volcano is that it does not breathe fire.

Active volcanoes are in an active, semi-active phase, erupting intermittently or periodically; Extinct volcanoes have ceased to erupt, craters have healed, and volcanoes are no longer active. Some extinct volcanoes still retain their unique volcanic morphology, but there are no records of eruptions or active manifestations in history.

Volcanic eruption conditions:

1. For the formation of partial melt, there must be a high geothermal heat, or a uplift and decompression process, or dehydration to reduce the solidus.

2. The enrichment of magma in the earth's crust, or the location of the formation of magma sacs, is related to the depth of the neutral buoyancy surface, which in turn is related to the rheological discontinuity of the crust.

3. The physicochemical processes in the magma sac are mainly the fraction and interaction of crystals, volatiles and fluids, and the magma eruption initiates or inhibits it. The presence of magma sacs in the earth's crust plays a role in intercepting and transforming the magma on the rising mantle. It is also an important condition for the formation of **-type volcanic eruptions.

4. The existence of magma sacs promotes the formation of magma channels, and the tensile stress field generated by tectonic activities is the main reason for the formation of magma channels.

5. The rise of magma after leaving the magma sac is driven by both pressure gradient and buoyancy.

The main difference between an active volcano and a dead volcano is that an active volcano is in an active and semi-active period, and is erupting intermittently or periodically; Extinct volcanoes have ceased to erupt, craters have healed, and volcanoes are no longer active. The extinct volcanoes that are suspicious of the world still retain the unique form of volcanoes, but there are no records of eruptions or active manifestations in history.

An active volcano is a volcano that has erupted and is expected to erupt again. Those dormant volcanoes, even if they are alive, are not about to erupt, and those that are likely to erupt again can also be called active. The eruptions of active volcanoes are cyclical, such as Mount Merapi on the island of Java, which has erupted continuously every two or three years since the beginning of this century.

The eruptive activity of active volcanoes is also intermittent, but the duration of the intermittent time varies.

The death of the wide hand volcano refers to the eruption that has long ceased to erupt, and there is no sign of eruption in modern times, only volcanic remains. These volcanoes have lost their ability to erupt for a long time, and some of them still remain intact volcanic forms, while others have been weathered and eroded, leaving only incomplete volcanic remains.

According to the nature of their activity, volcanoes are divided into three types: active volcanoes, dormant volcanoes, and extinct volcanoes. Active volcanoes: Active volcanoes, including those that are still erupting regularly and those that have not erupted for a long time but have erupted in human history.

Dormant volcanoes: Volcanoes that have not erupted for a long time, but will erupt in the future. It is a sleeping volcano that has left the crustal movement zone and temporarily ceased its activity, and once it re-enters the crustal movement zone, there is a chance that it will erupt again.

It is difficult to draw a clear line between it and an active volcano. Extinct volcanoes: volcanoes that are no longer active, and some still have volcano-specific morphologies, but there is no record of eruptions in history, and there are no active manifestations.

According to statistics, there are now more than 500 active volcanoes in the world, three-quarters of which are distributed on the Pacific Rim coast, forming the famous active volcanic belt around the Pacific Ocean; The second is the active volcanic belt of the Alps and Himalayas, which are all located in the Cenozoic lithospheric tectonic activity zone, which is the law of modern volcanic distribution. There are more than 600 extinct volcanoes and dormant volcanic relics found in China. It is mainly distributed in the northeast, Datong, Shanxi, southeast coast, Taiwan Island and Tengchong in western Yunnan.

Active volcanoes and volcanic activity areas are located on the island of Taiwan and Tengchong in Yunnan. In addition to the harm they cause to humans, volcanoes also have a positive side to them. Volcanic ash is a natural mineral fertilizer; A variety of useful minerals have been formed by condensation near the crater, mainly arsenic, chlorine, boron, sulfur, and sometimes iron, copper, diamond and other mineral resources; Volcanoes and volcanic activity areas are rich in geothermal resources, often in the form of hot springs, hot springs, boiling springs, etc., and these natural resources can benefit mankind after being exploited and utilized.

In addition, active volcanoes also provide a "window" for humans to peek into the composition of the earth's internal materials, kinetic energy, and other effectsActive volcanoes Example: Qixing Mountain in the Datun Volcanic Group in Taiwan, Vesuvius Volcano Extinct Volcano Example:

Extinct volcanoes near Datong, Shanxi Province Dormant volcanoes Example: Baitou Mountain in Changbai Mountain, China, and five lotus ponds in Heilongjiang.

Both active and extinct volcanoes are a type of volcanic activity.

Active volcanoes are volcanoes that erupt and are expected to erupt again, dormant volcanoes, even if they are alive but not about to erupt, and volcanoes that are likely to erupt again can also be called active volcanoes.

Those volcanoes that last erupted a long time ago and have been shown not to erupt in the foreseeable period are called extinct volcanoes or extinct volcanoes. In general, only active volcanoes erupt in general.

The main form of modern volcanic activity

1. Tranquility: When a volcano erupts, only a large amount of hot lava quietly overflows from the crater and flows slowly down the hillside, like boiling rice soup boiling out of a rice pot. The overflow is mainly mafic molten slurry, which has a high melting temperature, low viscosity and easy flow.

It contains less gas, has no ** phenomenon, and is represented by Hawaiian volcanoes, also known as Hawaiian type. These volcanoes can be enjoyed to their heart's content.

2. Explosive type: When the volcano erupts, it produces a violent **, and at the same time spews out a large amount of gas and volcanic debris materials, and the molten slurry spewed out is mainly medium acid molten slurry. On December 16, 1902, the eruption of Mount Peret in the West Indies shook the world.

It spews out a viscous magma while spewing out a lot of pumice and red-hot ash. The eruption, which killed 26,000 people, is one such type, also known as the Peret.

The above content refers to Encyclopedia - Active Volcanoes.