The metaphor from the sliding zone cuts the Red River

From studies of the Red River shear zone, Red River fault zone has deep fault in Southeast Asia with maximum earthquake can reach 6.0 ± 0.3 richter.

Scientists warn of environmental geological hazards such as earthquakes, cracks, landslides, mud and rock floods, river bank erosion . are potential risks. These are the research results recently published by Vietnamese and Polish scientists at the workshop of 'North and Red River fault zone in northern Vietnam' held on November 23, in Hanoi.

Interesting findings

One of the most important tectonic events in Asia, directly related to Vietnam is the Indian continental plate crashing into the Eurasian array, leading to the creation of the world's most majestic Himalayas and creating Red River's shear zone (DTCSH), also known as Ailao Shan shear zone - Red River. This shear zone runs for thousands of kilometers, extending in the Northwest - Southeast, throughout Southeastern Tibet (China), cutting through northern Vietnam to the South China Sea. The Red River Fault Zone lies in DTCSH.

Prof. Nguyen Trong Yem, Institute of Geology, Vietnam Academy of Science and Technology said: 'In order to have accurate parameters, the group of Vietnamese and Polish geological scientists has focused on research for the past 10 years. Cenozoic geodynamics of Vietnam (Tan Sinh geological era 40 million years ago).

The unique feature of DTCSH is the distribution of small, narrow Miocene basins controlled by the faults in this zone. Researching basins, scientists affirmed that DTCSH was formed not a complete 'resting' phase as judged by many geologists before.

Based on geomorphological signs in many locations distributed over a length of over 200km from the Vietnam - China border to Phu Tho, for the first time, scientists determined the right displacement amplitude of faults in the DTCSH section in Vietnam. Male is only nearly 14 km, much less than other studies (from 20 to 250 km). This study helps to make earthquake predictability more accurate.

Field survey of sediments in Lao Cai area.Photo PN

Related to the city along the Red River

According to Dr. Nguyen Quoc Cuong, Institute of Geology, Vietnam Academy of Science and Technology, with studies on tectonic, geological, and geomorphologic, many risks of accidents can occur in the Red River fault zone. . Potential risks such as earthquakes, cracks, landslides, rock and mud floods, erosion of river banks, coastline . All these risks are expressed through the history of geological tectonics. As with earthquakes, although it is not possible to predict the exact time of nearing, it is possible to make a relatively long forecast (maybe several hundred years later).

According to experts, the phenomenon of cracking occurs most strongly in Bat Bat (Ba Vi, Hanoi), Tan Hoi (Dan Phuong, Hanoi), Phu Ly (Ha Nam), Lien Mac, Vien Nam (Me Linh, Vinh Phuc), Kim Dong (Hung Yen). River erosion phenomenon is mainly developed along the Red River, Chay River belongs to the town of Lao Cai (Lao Cai). The phenomenon of mud and rock floods can occur in mountainous areas.

The scientists also said that the area affected by the Red River fault zone in Vietnam is a large, densely populated area and many areas have an important role in the national economy such as works. Thac Ba, Hoa Binh, Viet Tri, Ha Noi, Nam Dinh industrial parks, dike systems of the Northern Delta, mineral, petroleum and brown coal mines in mountainous areas and low-lying areas of Hanoi ( Viet Tri - Nam Dinh - Hai Phong triangle and Bac Bo bay.

According to Prof. Yêm, the geological zone is also related to the city project along the Red River, so all construction works here must be calculated to anticipate possible geological changes, avoiding any losses. worth it.

Dr. Nguyen Quoc Cuong said: All research parameters will be widely published so that other sectors can handle environmental geological hazards in the construction of hydropower plants, urban planning and development. sustainable in the region. Currently, it is only studied along the Red River, Chay, Lo River fault zones along the Cao Bang, Dien Bien and Son La border lines . It is expected that in the coming time, the Da River - Ma River will be expanded and opened. wide cooperation with countries in Southeast Asia. The ultimate goal focuses on research to identify risks of environmental hazards and search for mineral resources.