Where is the tropical climate in China? Hainan Island is the second largest island in China. It is located at the southernmost end of China’s territory and is also known as a bright pearl inlaid in the South China Sea. Hainan Island, covering an area of more than 30000 square kilometers, is the second largest treasure island in China. The whole Hainan Island has a tropical monsoon marine climate, with no obvious seasonal boundaries, distinct dry and rainy seasons, and unique environment and climate, making Hainan an important tourist destination. So how did Hainan Island come from?
Relevant experts predict that “Hainan Island is floating, and it is still drifting southeast counterclockwise.” many local islanders can’t believe this. In fact, scientists have another explanation: “the drift of Hainan Island is related to the crustal movement, because life is also in motion. It floats and rotates at the same time.” How did Hainan Island come into being? Where will Hainan Island drift in a few hundred years?
The picture shows the plate drift of Hainan Island
The former life of Hainan Island — how did Hainan Island come into being in China? “Squeeze out”
More than 65 million years ago, Hainan Island was actually closely connected with the land of today’s Guangdong Province. How did Hainan Island separate from the land? Relevant geologists believe that there should have been a crustal movement at that time, which led to the subsidence of most of the land and formed the Qiongzhou Strait. This crustal movement also triggered a volcanic eruption in the northern part of Hainan Island. With the violent eruption, more and more materials were ejected, which expanded the area of Hainan Island.
In the process of geographical changes of Hainan Island, because the volcanic movement caused the island to turn clockwise, most of the soil around Hainan Island is volcanic weathered soil. The biggest characteristic of this kind of soil is rich in a large amount of iron. Through the impact of volcanic eruption, the central and southern parts of Hainan Island bear more pushing force from the Beibu Gulf rift, and uplift into a large area There are many kinds of metal deposits in the mountain area. In other words, Hainan Island is the result of crustal movement. Today’s Haikou City has more than 100 square kilometers of volcanic swarms, which is the place with the most volcanoes in China. However, there is no conclusive evidence for the claim that the volcanic eruption expanded the area of Hainan Island.
The picture shows the Haikou volcano group
In the study of the dynamic mechanism of Hainan Island drift, geologists found that although Hainan Island drift is related to crustal movement, the dynamic source of this crustal movement is closely related to the Indian plate. If the Indian plate is regarded as a big gear, it encounters the deep-rooted nail “Mount Emei” when it is squeezing towards China, so its big gear generally starts to rotate in the southeast direction, so that the Southeast Asian plate, including Thailand and Cambodia, extrudes from the southwest of China, along the southeast direction of the gear rotation, starts to rotate to the right, forming their present situation Where you are.
Hainan Island is separated from China’s Beibu Gulf (the current southern sea area of Guangxi Province). It’s like a small gear is bitten and driven by a big gear, drifting to the southeast and accompanied by left rotation. In today’s popular way, the Indian plate is squeezed in the crustal movement and scraped to China’s Beibu Gulf. The scraped land plate is Hainan Island plot.
The most primitive strata in Hainan Island can be divided into three types: Paleozoic, Mesozoic and Cenozoic. Magmatic rocks and oil and gas basins are widely distributed in these strata. The genetic mechanism of Hainan Island is closely related to the crustal movement and evolution of the Indian plate. Hainan Island was formed in the process of evolution, and the Qinghai Tibet Plateau was formed in the process of compression and collision with the Eurasian plate.
The picture shows the Qinghai Tibet Plateau
Affected by geological changes, Hainan Island may be separated from Leizhou Peninsula
From the perspective of the whole geographical structure of Hainan Island, it is very compact. Through crustal movement, Hainan Island has been squeezed out. In this process, the central and southern mountains of Hainan Island can not bear the load. In the central area, it is divided into two parts and becomes a fault zone, forming an East-North to southwest trend of Hainan Island. If the extruded central and southern mountains are the backbone of Hainan Island, then in the mountainous area In the process of geological evolution, the whole rotation of Hainan Island resulted in the formation of a screw shaped Valley, just like a giant top.
If we enlarge the territory of China, Hainan Island and Leizhou Peninsula are combined as a whole. In the process of splicing, we will find that they are perfectly matched. The sea surface width between Leizhou Peninsula and Hainan Island is less than 20 km. The terrain of Leizhou Peninsula is gentle. The whole trend is low in the southeast and high in the northwest. The Leizhou canal runs through the northern part of the peninsula. Leizhou Peninsula is so close to Hainan Island that it is easy for people to think that Hainan Island was separated from Leizhou Peninsula. After geological changes, it is reasonable that Hainan Island evolved.
The picture shows Leizhou Peninsula
Is there any basis for the separation of Hainan Island from the mainland?
Archaeologists have excavated vertebrates in the Nanchang River, Hainan Province. They are different in appearance, including proboscis, reptiles, some birds and fish. These vertebrates are roughly the same as those found in the mainland. Through the fossil detection of these vertebrates, archaeologists predict that they are probably animals in the Lingnan area of the mainland. Through this major discovery, we can also see that it is very likely that Hainan was separated from the mainland.
If the mainland is a mother, then Hainan is the fetus it gave birth to. The unique tropical island climate and geographical conditions are very similar to the mainland. Hainan Island is not only a paradise for the reproduction of animals and plants, but also a typical representative of the development of human civilization. The diversified geographical characteristics of Hainan make many experts think that it is an excellent representative of the human migration from the Chinese nation.
There has been controversy over how Hainan Island has been formed. Most scholars have realized that the geological characteristics of Hainan Island are similar to those of Chinese mainland, and most likely they are separated from Chinese mainland. But this argument needs more solid proof. In order to prove how Hainan Island was formed, we first find out the reasons for the formation of Qiongzhou Strait, and the relationship between them is inseparable.
The picture shows animal fossils 30 million years ago
The future: millions of years later,
Hainan Island rotates counter clockwise, drifting farther and farther
It joins the Strait of Malacca,
Become the golden coastline
Qiongzhou Strait is located in the South China Sea. It is the third continental marginal sea in the world. It is adjacent to many straits, such as Babuyan in the East, Taiwan Strait in the northeast, Malacca Strait in the southwest, including Singapore Strait. These Straits form a sea area extending in all directions. If Hainan Island rotates anticlockwise and drifts continuously, according to its geographical position, it can only reverse in the marine field, and can not collide with the continental plate. Qiongzhou Strait is regarded as an independent and interconnected marine body. According to its adjacent parts of the Strait, Hainan Island is likely to drift to the Strait of Malacca in the next few million years, and finally drift to the Strait of Malacca In the position of.
Malacca Strait is between Malay Peninsula and Sumatra island. There is a long and thin waterway, which is southeast northwest. Its northwest end is connected with the Andaman Sea, and its southeast end is connected with the South China Sea, which is the only direction of Hainan Island reversal.
The import and export volume of the Strait of Malacca is three times that of the Suez Canal. Hundreds of thousands of ships pass through it every year. The whole Strait of Malacca is composed of more than 60 islands. If Hainan Island drifts and turns to the Strait of Malacca and turns into a golden coastline in the future, then the dominant power will be controlled by China. The Strait of Malacca connects the routes of the Indian Ocean and Asian countries, and the future of the Indian Ocean It is very likely that the freight routes to Asia will be owned by our country. Of course, all this is just my personal opinion.
Due to the change of the earth’s magnetic field, it is connected with the Indian Ocean plate
The Indian Ocean plate mainly includes the Indian peninsula and the Arabian Peninsula. The Indian Ocean plate is very active. Volcanic activities occur frequently in the shallow surface. The mantle along the river generates the crust in the ocean. In the next few million years, if the earth’s magnetic field changes, the mantle magma of the Indian Ocean plate will continue to rise, and Hainan Island will be affected by the earth’s magnetic field, and the reverse direction will also change In the new crustal movement, Hainan Island will gradually become “brothers” with the Indian peninsula and the Arabian Peninsula due to the expansion and advancement of the Indian Ocean plate.
The picture shows the Indian peninsula
3. Affected by the crustal movement, it no longer drifts and shows a “disappearing” trend
As one of the four deserts in China, the Maowusu Desert will gradually disappear in the future due to the influence of extreme weather and the change of ecological environment. In the same way, Hainan Island may not drift again and disappear completely in the earth in the next few million years. In the geological fault zone of Hainan Island, a large area of Beibu Gulf collapses. In the next few hundred years of geological movement, affected by natural climate factors, the South China Sea rises, earthquakes and volcanic eruptions are frequent. With the pouring of sea water, Hainan Island will gradually rise to the depth of Hainan Island continental plate, that is to say, it is possible that Hainan Island will sink in the whole South China Sea, gradually move away and even disappear completely Loss.
The picture shows the disappearing Mu Us Desert
However, the drift of Hainan Island is a slow and long-term process, and its overall drift and rotation are closely related to the collision between India and Eurasia. For this collision or the compression between the two continents, its consequences are very far-reaching. Not only has Hainan Island been drifting around for tens of millions of years, but even in the next few million years, Hainan Island will still be in the state of “drifting around” and will not stop.
Some netizens speculated: will the rotation and drift from Hainan Island wake up the active volcanoes on Hainan Island? Finally, not only will Hainan Island drift further and further away from the mainland, but the eruption of the Volcanic Group will also lead to the extinction of Hainan Island, and all animals and plants will perish. Do you think so