A new hypothesis is proposed for the convection of the Earth’s mantle

The mantle is one of the spherical shells that make up the Earth. It is located between the earth’s crust and the core. A direct study of the mantle material is impossible today – a technology that would allow the bark to be fully drilled, still does not exist. There are ambitious projects for such studies (for example, the recent project of Japanese geologists), but none of them have yet been implemented. Therefore, now scientists create theoretical models that explain possible principles of organization of the substance of the mantle.
 
In a new article published in the journal Scientific Reports, scientists from the University of Leicester said: according to their research, the Earth’s mantle is not homogeneous, as was thought before. According to scientists, it consists of two large regions, each of which is an independent process of convection. Between these areas practically do not mix. One of the regions is located under the Pacific Ocean, the other is surrounded by it.
 
The substance of the upper mantle moves downward, reaching subduction zones, where one block of the earth’s crust is partially submerged under the other. Dropping down, the substance of the mantle forms a “curtain” that does not allow the next “wave” of matter to flow into another section of the mantle. Reaching the border with the earth’s core, the substance of the mantle, according to scientists, does not spread in different directions, but returns to the same site from which the ascent began.
 

Convection in the robes, Scientific Reports
 
Scientists used 3D modeling techniques, paleotectonic reconstructions and analysis of the content of hafnium and neodymium isotopes in the earth’s crust. Based on the data of geochemical studies and analysis of the motion of lithospheric plates, scientists suggested that such a process of convection in the earth’s mantle could begin 550 million years ago.

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