Is Wencheng Hot Spring a natural hot spring?

Wencheng Hot Spring is a natural hot spring.

Hot spring is a type of spring water that naturally gushes out from the ground. The temperature at the mouth of the spring is significantly higher than the local average annual temperature. It also contains mineral spring water with trace elements that are beneficial to human health. .

There are also artificially dug wells in many areas, usually at 600 to 2,000 meters. Deep water pumps are used to extract groundwater, which is rich in a variety of beneficial minerals. The water temperature is generally above 20 degrees Celsius. It is also called a hot spring well. Due to the differences in climate, latitude and altitude in different places, it is difficult to unify the lower temperature limit of hot springs.

The formation of hot springs can generally be divided into two types: one is formed by magma inside the earth's crust, or is accompanied by volcanic eruptions. The surface of the earth is raised by plate movement, and there is still uncooled magma beneath.

They will continuously release a large amount of heat energy. Due to the concentrated heat of such heat sources, as long as there are water-bearing rock formations with pores nearby, they will not only be heated into high-temperature hot water, but most of them will boil into steam. Mostly sulfate springs.

The second is formed by the infiltration and circulation of surface water. That is to say, when rainwater falls on the surface and penetrates downward, it penetrates deep into the aquifers deep in the earth's crust to form groundwater (sandstone, conglomerate, volcanic rock, these are good aquifers).

Groundwater is heated by the geothermal energy below to become hot water. Most of the deep hot water contains gases. These gases are mainly carbon dioxide. When the temperature of the hot water rises, if there are dense and impermeable rock layers blocking its way, The pressure will become higher and higher, so that hot water and steam will be in a high-pressure state, and will rush up as soon as there is a crack.