What is the deepest trench on earth?

Also known as Mariana Trench. It is located at1120 ′ n,1421.5 ′ e, which is the bottom of the Pacific Ocean near Mariana Islands in the northeast of the Philippines, starting from Iojima in the north and reaching Yapo Island in the southwest.

There are trenches such as Aleutian, Thousand Islands and Kogasawara in the north, and trenches such as New Britain and New Hebrides in the south, with a total length of 2,550 kilometers and an arc shape with an average width of 70 kilometers. It is estimated that this trench has been formed for 60 million years.

The deepest part of Mariana Trench is 6~ 1 1 km, which is the deepest part of the known ocean. It is characterized by high water pressure, complete darkness, low temperature, low oxygen content and lack of food resources, so it has become one of the worst environments on earth.

Mariana Trench is a plate subduction zone, and the submarine geological movement is very active. The material composition and genesis of seamount volcanic rocks are of interest to marine geologists.

Seabed mineral deposits:

In 201110, an international scientific research team found that the Mariana Trench stored a lot of carbon, which means that the trench plays a more important role in regulating the earth's environment than previously known. The Mariana Trench is like a sediment collector, and the amount of carbon transformed by bacteria in the trench is higher than that in the submarine plain at a depth of 6000 meters.

This shows that the carbon content in the trench is higher than previously thought by researchers. They didn't realize that there was such a carbon dioxide collection tank in the deep sea. The scientists' next idea is to quantify the research results.

Calculate how much carbon content in the deep-sea trench is higher than that in other sea areas, and how much carbon is transformed by bacteria. These data can help researchers better understand the role of deep-sea trenches in regulating climate.

Baidu Encyclopedia-Mariana Trench